pearl-data-explorer.ipf

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#pragma rtGlobals=3     // Use modern global access method and strict wave access.
#pragma IgorVersion = 6.1
#pragma ModuleName = PearlDataExplorer
#pragma version = 1.50
#include "pearl-area-import"
#include "pearl-area-profiles"
#include "pearl-area-display"
#include "pearl-pshell-import"
#if exists("MFR_OpenResultFile")
#include "pearl-matrix-import"
#endif

// copyright (c) 2013-16 Paul Scherrer Institut
//
// Licensed under the Apache License, Version 2.0 (the "License");
//   you may not use this file except in compliance with the License.
//   You may obtain a copy of the License at
//   http:///www.apache.org/licenses/LICENSE-2.0



static strconstant package_name = "pearl_explorer"
static strconstant package_path = "root:packages:pearl_explorer:"

static strconstant ks_filematch_adh5 = "*.h5"
static strconstant ks_filematch_pshell = "psh*.h5"
static strconstant ks_filematch_itx = "*.itx"
static strconstant ks_filematch_mtrx = "*_mtrx"

function pearl_data_explorer()
    init_package()
    load_prefs()
    execute /q/z "PearlDataExplorer()"
end

static function init_package()

    dfref savefolder = GetDataFolderDFR()
    SetDataFolder root:
    newdatafolder /o/s packages
    newdatafolder /o/s $package_name
    if (exists("v_InitPanelDone") == 2)
        SetDataFolder savefolder
        return 0
    endif
    
    make /o/n=0/t wtFiles
    make /o/n=0/i wSelectedFiles,wSelectedDatasets
    make /o/n=0/t wtDatasets
    make /o/n=0/t wtPositioners,wtDetectors
    make /o/n=0/i wSelectedPositioners,wSelectedDetectors
    
    make /o/n=(1,1) preview_image // preview 2D data
    make /o/n=0 preview_trace // preview 1D data
    make /o/n=0/t attr_names, attr_values, attr_filter, attr_filter_summary

    // persistent strings and variables. persistent = saved in preferences
    string /g s_filepath = "" // directory path to be listed
    string /g s_hdf_options = "" // recently used HDF5 load options
    string /g s_reduction_params = "" // recently used reduction parameters
    string /g s_preview_pvs = "" // semicolon-separated list of EPICS PVs to display in preview.
        // the list items can contain wildcards for StringMatch
    s_preview_pvs = "*OP:CURRENT*;*Stats*Total*;*KEITHLEY*READOUT;*CADC*"

    // non-persistent strings and variables
    string /g s_preview_file = "" // file or folder name of the current preview
    string /g s_preview_source = "" // data source, e.g. EPICS channel name, of the current preview
    string /g s_profiles_graph = "" // window name of the current preview if the data is two-dimensional
    string /g s_preview_trace_graph = "" // window name of the current preview if the data is one-dimensional
    string /g s_file_info = "" // description of selected file
    
    variable/g v_InitPanelDone = 1
    
    SetDataFolder savefolder
end

static function save_prefs()
    // saves persistent package data to the preferences file
    // the data saved in the file are: data file path, attributes filter
    dfref saveDF = GetDataFolderDFR()

    string fullPath = SpecialDirPath("Packages", 0, 0, 0)
    fullPath += package_name
    NewPath/O/C/Q tempPackagePrefsPath, fullPath
    fullPath += ":preferences.pxp"

    SetDataFolder root:packages
    SetDataFolder $package_name
    string objects = "attr_filter;attr_filter_summary;s_filepath;s_hdf_options;s_reduction_params;s_preview_pvs"
    SaveData /O /Q /J=objects fullPath

    KillPath/Z tempPackagePrefsPath
    
    SetDataFolder saveDF
end

static function load_prefs()
    // loads persistent package data from the preferences file
    // the preferences file is an Igor packed experiment file in a special preferences folder
    dfref saveDF = GetDataFolderDFR()

    variable result = -1
    setdatafolder root:
    NewDataFolder /O/S packages
    NewDataFolder /O/S $package_name
    dfref packageDF = GetDataFolderDFR()
    string fullPath = SpecialDirPath("Packages", 0, 0, 0)
    fullPath += package_name

    GetFileFolderInfo /Q /Z fullPath
    if (V_Flag == 0) // Disk directory exists?
        fullPath += ":preferences.pxp"
        GetFileFolderInfo /Q /Z fullPath
        if (V_Flag == 0) // Preference file exist?
            LoadData /O /R /Q fullPath
            result = 0
        endif
    endif
    
    if (result == 0)
        svar /sdfr=packageDF filepath = s_filepath
        NewPath /O/Z pearl_explorer_filepath, filepath
        update_filelist()
        update_datasets()
    endif
    
    SetDataFolder saveDF
    return result
end

static function pearl_file_type(filename)
    string filename
    
    if (StringMatch(filename, ks_filematch_pshell))
        return 1
    elseif (StringMatch(filename, ks_filematch_adh5))
        return 2
    elseif (StringMatch(filename, ks_filematch_itx))
        return 3
#if exists("MFR_OpenResultFile")
    elseif (StringMatch(filename, ks_filematch_mtrx))
        return 4
#endif
    else
        return 0
    endif
end

static function update_filelist()
    dfref saveDF = GetDataFolderDFR()

    string all_files
    wave /t wtFiles = $(package_path + "wtFiles")
    wave wSelectedFiles = $(package_path + "wSelectedFiles")
    variable nn
    
    PathInfo pearl_explorer_filepath
    if (v_flag == 1)
        all_files = IndexedFile(pearl_explorer_filepath, -1, "????")
        nn = ItemsInList(all_files)
    else
        all_files = ""
        nn = 0
    endif
    
    make /n=(nn) /t /free wtAllFiles
    wtAllFiles = StringFromList(p, all_files)
    Extract /o /t wtAllFiles, wtFiles, pearl_file_type(wtAllFiles[p])
    Sort /A /R wtFiles, wtFiles
    
    redimension /n=(numpnts(wtFiles)) wSelectedFiles
    wSelectedFiles = 0
    
    setdatafolder saveDF
end

static function update_datasets()
    // updates the list of imported datasets.
    // a dataset means any top-level data folder
    // which includes a string variable named pearl_explorer_import.
    dfref saveDF = GetDataFolderDFR()

    setdatafolder root:
    dfref rootdf = GetDataFolderDFR()
    setdatafolder $package_path
    dfref privatedf = GetDataFolderDFR()
    
    wave /t wtDatasets
    wave wSelectedDatasets
    variable maxdf = CountObjectsDFR(rootdf, 4)
    redimension /n=(maxdf) wtDatasets
    
    variable idf = 0
    variable ndf = 0
    string sdf
    
    do
        sdf = GetIndexedObjNameDFR(rootdf, 4, idf)
        if (strlen(sdf) >= 1)
            setdatafolder rootdf
            setdatafolder $sdf
            svar /z importer = pearl_explorer_import
            if (svar_exists(importer))
                wtDatasets[ndf] = sdf
                ndf += 1
            endif
        else
            break
        endif
        idf += 1
    while(1)
    
    redimension /n=(ndf) wtDatasets, wSelectedDatasets
    wSelectedDatasets = 0
    sort wtDatasets, wtDatasets
    
    setdatafolder saveDF
end

static function preview_file(filename)
    string filename
    
    dfref saveDF = GetDataFolderDFR()
    
    variable ft = pearl_file_type(filename)
    switch(ft)
        case 1:
            wave /z image = preview_pshell_file(filename)
            break
        case 2:
            wave /z image = preview_hdf_file(filename)
            break
        case 3:
            wave /z image = preview_itx_file(filename)
            break
        case 4:
            wave /z image = preview_mtrx_file(filename)
            break
        default:
            wave /z image = $""
    endswitch
    
    if (WaveExists(image))
        string graphname = show_preview_graph(image)
        // preset ELOG panel - if available
        if (exists("PearlElog#set_panel_attributes") == 6)
            string cmd
            sprintf cmd, "PearlElog#set_panel_attributes(\"\", \"File=%s\")", ParseFilePath(0, filename, ":", 1, 0)
            execute /Q/Z cmd
            if (strlen(graphname) > 0)
                sprintf cmd, "PearlElog#set_panel_graphs(\"\", \"%s\")", graphname
                execute /Q/Z cmd
            endif
        endif
    endif
    
    setdatafolder saveDF
    return 0
end

static function /wave preview_pshell_file(filename)
    string filename

    dfref saveDF = GetDataFolderDFR()

    setdatafolder $package_path
    dfref previewDF = GetDataFolderDFR()
    svar s_preview_file
    svar s_preview_source
    svar /z s_file_info
    if (! svar_exists(s_file_info))
        string /g s_file_info
    endif
    
    dfref tempDF = NewFreeDataFolder()
    setdatafolder tempDF
    string dataname
    dataname = psh5_load_preview("pearl_explorer_filepath", filename)
    
    s_preview_file = filename
    s_preview_source = ""

    wave /z data = $dataname
    if (waveexists(data))
        duplicate /o data, previewDF:preview_image
    else
        print "no data found in file " + filename
    endif
    
    if (strlen(s_preview_file) > 0)
        s_file_info = psh5_load_info("pearl_explorer_filepath", filename)
    else
        s_file_info = ""
    endif
    
    dfref attrDF = tempDF:attr
    if (DataFolderRefStatus(attrDF))
        preview_attributes(attrDF)
    endif
    
    setdatafolder saveDF
    wave /z /sdfr=previewDF preview_image
    return preview_image
end

static function /wave preview_hdf_file(filename)
    string filename

    dfref saveDF = GetDataFolderDFR()
    setdatafolder $package_path
    svar s_preview_file
    svar s_preview_source
    adh5_load_preview("preview_image", "pearl_explorer_filepath", filename)
    s_preview_file = filename
    s_preview_source = ""
    wave /z preview_image
    
    svar /z s_file_info
    if (! svar_exists(s_file_info))
        string /g s_file_info
    endif
    if (strlen(s_preview_file) > 0)
        s_file_info = adh5_load_info("pearl_explorer_filepath", filename)
    else
        s_file_info = ""
    endif
    
    if (DataFolderExists("attr"))
        setdatafolder attr
        preview_attributes(GetDataFolderDFR())
        setdatafolder ::
    endif
    
    setdatafolder saveDF
    return preview_image
end

static function /wave preview_itx_file(filename)
    string filename

    dfref saveDF = GetDataFolderDFR()
    setdatafolder $package_path
    svar s_preview_file
    svar s_preview_source
    wave preview_image

    dfref dataDF = newfreedatafolder()
    setdatafolder dataDF
    LoadWave /t/p=pearl_explorer_filepath/q filename
    s_preview_file = s_filename
    s_preview_source = ""
    
    preview_datafolder()
    preview_attributes(dataDF, include_datawaves=0)
    
    setdatafolder saveDF
    return preview_image
end

static function /wave preview_mtrx_file(filename)
    string filename

#if exists("MFR_OpenResultFile")
    dfref saveDF = GetDataFolderDFR()
    setdatafolder $package_path
    variable /g V_MatrixFileReaderOverwrite = 1
    variable /g V_MatrixFileReaderFolder = 0
    variable /g V_MatrixFileReaderDouble = 0
    svar s_preview_file
    svar s_preview_source
    string datanames
    string dataname
    datanames = mtrx_load_preview("preview", "pearl_explorer_filepath", filename)
    if (strlen(datanames) > 0)
        s_preview_file = filename

        dataname = StringFromList(0, datanames)
        wave data = $dataname
        duplicate /o $dataname, preview_image
        s_preview_source = StringByKey("Dataset", note(data), "=", "\r")
        
        svar /z s_file_info
        if (svar_exists(s_file_info))
            s_file_info = ""
        endif
        
        variable i
        variable n = ItemsInList(datanames)
        string s
        for (i = 0; i < n; i += 1)
            s = StringFromList(i, datanames)
            killwaves /z $s
        endfor
    endif
    wave /z preview_image
    setdatafolder saveDF
#else
    wave /z preview_image = $""
#endif
    return preview_image
end

static function extract_preview_image(data, preview)
    // extracts a preview image from a wave of arbitrary dimension
    wave data
    wave preview

    variable z1, z2

    // extract image
    switch (WaveDims(data))
        case 1:
            redimension /n=(numpnts(data)) preview
            preview = data[p]
            break
        case 2:
            redimension /n=(dimsize(data, 0), dimsize(data, 1)) preview
            preview = data
            break
        case 3:
            redimension /n=(dimsize(data, 0), dimsize(data, 1)) preview
            z1 = floor(DimSize(data, 2) / 2)
            z2 = z1
            wave slab = ad_extract_slab(data, nan, nan, nan, nan, z1, z2, "", pscale=1)
            preview = slab
            break
        case 4:
            // not implemented
    endswitch
    
    switch (WaveDims(data))
        case 4:
        case 3:
        case 2:
            setscale /p y dimoffset(data, 1), dimdelta(data, 1), waveunits(data, 1), preview
        case 1:
            setscale /p x dimoffset(data, 0), dimdelta(data, 0), waveunits(data, 0), preview
            setscale d 0, 0, waveunits(data, -1), preview
    endswitch
end

static function preview_dataset(datasetname)
    string datasetname // name of a data folder under root
    
    dfref saveDF = GetDataFolderDFR()

    if (!DataFolderExists("root:" + datasetname))
        return -1
    endif
    setdatafolder root:
    setdatafolder $datasetname
    dfref datadf = GetDataFolderDFR()
    wave /z data

    setdatafolder $package_path
    svar s_preview_file
    svar s_preview_source
    wave preview_image
    if (WaveExists(data))
        s_preview_file = datasetname
        s_preview_source = ""
        extract_preview_image(data, preview_image)
        show_preview_graph(preview_image)
    else
        preview_image = nan
        s_preview_file = datasetname
        setdatafolder datadf
        preview_datafolder()
        show_preview_graph(preview_image)
    endif

    // attributes
    setdatafolder datadf
    if (DataFolderExists("attr"))
        setdatafolder attr
        preview_attributes(GetDataFolderDFR())
    else
        preview_attributes(GetDataFolderDFR(), include_datawaves=0)
    endif
    
    setdatafolder saveDF
    return 0
end

static function preview_datafolder()
    // preview data in the current data folder
    dfref saveDF = GetDataFolderDFR()

    setdatafolder $package_path
    svar s_preview_file
    svar s_preview_source
    svar s_preview_pvs
    wave preview_image

    setdatafolder saveDF
    
    // select a wave to display
    // consider only double-precision waves, i.e. ignore text and other special waves
    // filter by matching PV name to s_preview_pvs
    string d_names = WaveList("*", ";", "DP:1")
    variable nw = ItemsInList(d_names, ";")
    variable npv = ItemsInList(s_preview_pvs, ";")
    variable iw, ipv
    string wname, wnote, pv_name, pv_match
    for (iw = 0; iw < nw; iw += 1)
        wname = StringFromList(iw, d_names, ";")
        wnote = note($wname)
        pv_name = StringByKey("PV", wnote, "=", "\r")
        // find matching data wave by PV name
        for (ipv = 0; ipv < npv; ipv += 1)
            pv_match = StringFromList(ipv, s_preview_pvs)
            if (StringMatch(pv_name, pv_match))
                wave data = $wname
                s_preview_source = pv_name
                extract_preview_image(data, preview_image)
                preview_setscale_x(data, preview_image)
                npv = 0
                nw = 0
            endif
        endfor
    endfor
    
    setdatafolder saveDF
end

static function preview_setscale_x(data, preview)
    // sets the approximate x scale of OTF data.
    // requires an Axis1 tag with name of x wave in the wave note.
    // if any of these conditions is true, the function does not change the scaling:
    // 1) Axis1 tag or referenced wave is missing.
    // 2) preview wave is not set to point scaling.
    // 3) x wave is not monotonic (90% of the steps in the same direction).
    wave data
    wave preview
    
    if ((DimOffset(preview, 0) == 0) && (DimDelta(preview, 0) == 1))
        string xname = StringByKey("Axis1", note(data), "=", "\r")
        wave /z xwave = $xname
        if (WaveExists(xwave))
            // check for monotonicity
            variable monotonic = 0
            duplicate /free xwave, xdiff
            differentiate /p xwave /D=xdiff
            duplicate /free xdiff, xflag
            xflag = xdiff > 0
            monotonic = sum(xflag) > numpnts(xwave) * 0.9
            xflag = xdiff < 0
            monotonic = monotonic || (sum(xflag) > numpnts(xwave) * 0.9)
            if (monotonic)
                setscale /i x xwave[0], xwave[numpnts(xwave)-1], waveunits(xwave, -1), preview
            endif
        endif
    endif
end

static function preview_attributes(attr_folder, [dest_folder, attr_filter, include_datawaves, include_infowaves])
    // copies the first elements of attributes in the specified folder to the preview waves
    // by default, all existing attributes are copied
    // if a text wave attr_filter exists in the pear_explorer folder, only the attributes referenced therein are copied
    // to set up a filter, duplicate the attr_names wave of a template dataset, and remove unwanted items
    dfref attr_folder   // data folder which contains the attribute waves
    dfref dest_folder   // destination folder. the output is written to the attr_names and attr_values waves
        // default = package folder
    wave /t attr_filter // list of attributes allowed in the output
        // default = use attr_filter of package folder
    variable include_datawaves // 1 (default) = include data waves (any numeric wave which has a PV=name note)
        // 0 = don't include attributes from data waves
    variable include_infowaves // 1 (default) = include attributes from info waves (IN, ID, IV, IU)
        // 0 = don't include attributes from info waves
    
    dfref saveDF = GetDataFolderDFR()
    setdatafolder $package_path
    
    if (ParamIsDefault(dest_folder))
        dest_folder = GetDataFolderDFR()    // package folder
    endif
    if (ParamIsDefault(attr_filter))
        wave /t /z attr_filter
    endif
    if (ParamIsDefault(include_datawaves))
        include_datawaves = 1
    endif
    if (ParamIsDefault(include_infowaves))
        include_infowaves = 1
    endif
    
    setdatafolder dest_folder
    wave /t /z attr_names, attr_values
    if (!WaveExists(attr_names) || !WaveExists(attr_values))
        make /n=(1) /o /t attr_names, attr_values
    endif
    attr_names = ""
    attr_values = ""
    
    setdatafolder attr_folder
    wave /t /z IN
    wave /t /z ID
    wave /t /z IV
    wave /t /z IU

    // compile list of attributes
    variable nattr  // destination attributes
    variable iattr
    variable ninfo // info wave elements
    variable iinfo
    variable nw // attribute waves
    variable iw
    string sw
    string ss

    if (WaveExists(IN) && include_infowaves)
        ninfo = numpnts(IN)
    else
        ninfo = 0
    endif
    if (include_datawaves)
        string waves = WaveList("*", ";", "")
        string exceptions = "ID;IN;IU;IV"
        waves = RemoveFromList(exceptions, waves)
        nw = ItemsInList(waves, ";")
    else
        nw = 0
    endif
    
    if (WaveExists(attr_filter) && (numpnts(attr_filter) >= 1))
        nattr = numpnts(attr_filter)
        redimension /n=(nattr)  attr_names
        attr_names = attr_filter
    else
        if(ninfo > 0)
            redimension /n=(ninfo) attr_names
            attr_names = SelectString(strlen(ID[p]) >= 0, IN[p], ID[p]) // use ID unless empty
        endif
        
        nattr = ninfo + nw
        iattr = ninfo
        redimension /n=(nattr) attr_names
        for (iw = 0; iw < nw; iw +=1 )
            sw = StringFromList(iw, waves, ";")
            ss = StringByKey("PV", note($sw), "=", "\r")
            FindValue /text=sw attr_names
            if ((v_value < 0) && (strlen(ss) >= 0))
                attr_names[iattr] = sw
                iattr += 1
            endif
        endfor
        nattr = iattr
    endif
    redimension /n=(nattr)  attr_names, attr_values
    sort attr_names, attr_names
    
    // look up attribute values
    for (iattr = 0; iattr < nattr; iattr += 1)
        sw = attr_names[iattr]
        // try info waves
        if (ninfo > 0)
            FindValue /text=sw ID
            if (v_value >= 0)
                attr_values[iattr] = IV[v_value]
            endif
            FindValue /text=sw IN
            if (v_value >= 0)
                attr_values[iattr] = IV[v_value]
            endif
        endif
        
        // override from attribute wave if existent
        if (nw > 0)
            switch (WaveType($sw, 1))
                case 1: // numeric
                    wave /z w = $sw
                    if (WaveExists(w) && (numpnts(w) >= 1))
                        sprintf ss, "%g", w[0]
                        attr_values[iattr] = ss
                    endif
                    break
                case 2: // text
                    wave /t/z wt = $sw
                    if (WaveExists(wt) && (numpnts(wt) >= 1))
                        attr_values[iattr] = wt[0]
                    endif
                    break
            endswitch
        endif
    endfor
    
    setdatafolder saveDF
end

static function display_dataset(datasetname)
    // displays the graph of a loaded dataset in its own window
    string datasetname // name of a data folder under root
    
    dfref saveDF = GetDataFolderDFR()

    if (!DataFolderExists("root:" + datasetname))
        return -1
    endif
    setdatafolder root:
    setdatafolder $datasetname
    dfref datadf = GetDataFolderDFR()
    wave /z data
    if (!WaveExists(data))
        wave /z data = data1
    endif

    if (WaveExists(data))
        switch(WaveDims(data))
            case 2:
                ad_display_profiles(data)
                break
            case 3:
                ad_display_slice(data)
                ad_brick_slicer(data)
                break
        endswitch
    endif

    setdatafolder saveDF
    return 0
end

function test_attributes_notebook()
    dfref df = GetDataFolderDFR()
    wave /t /sdfr=df attr_names
    wave /t /sdfr=df attr_values
    attributes_notebook(attr_names, attr_values, GetDataFolder(0))
end

static function attributes_notebook(attr_names, attr_values, title)
    wave /t attr_names
    wave /t attr_values
    string title
    
    dfref saveDF = GetDataFolderDFR()
    setdatafolder $package_path
    wave /t/z attr_filter, attr_filter_summary

    string name = CleanupName("nb_" + title[0,28], 0)
    if (WinType(name) == 5)
        Notebook $name selection={startOfFile, endOfFile}   
        Notebook $name text=""
    else
        NewNotebook /F=1 /K=1 /N=$name as title
        GetWindow $name wsize
        v_right = v_left + 260
        v_bottom = v_top + 360
        MoveWindow /W=$name v_left, v_top, v_right, v_bottom
        Notebook $name tabs={2*72}
    endif

    // summary
    if (WaveExists(attr_filter_summary) && (numpnts(attr_filter_summary) >= 1))
        notebook $name fStyle=1, text="Summary\r\r"
        notebook $name fStyle=0
        notebook_add_attributes(name, attr_filter_summary, attr_names, attr_values)
        notebook $name text="\r"
    endif

    // all attributes
    notebook $name fStyle=1, text="All Attributes\r\r"
    notebook $name fStyle=0
    notebook_add_attributes(name, $"", attr_names, attr_values)
    notebook $name selection={startOfFile,startOfFile}, findText={"",1}
    
    setdatafolder saveDF
end

static function notebook_add_attributes(notebook_name, attr_filter, attr_names, attr_values)
    string notebook_name
    wave /t /z attr_filter
    wave /t attr_names
    wave /t attr_values

    variable nw = numpnts(attr_names)
    variable iw
    string sw
    string ss

    variable do_filter = WaveExists(attr_filter)
    
    for (iw = 0; iw < nw; iw += 1)
        if (do_filter)
            sw = attr_names[iw]
            FindValue /text=sw attr_filter
        else
            v_value = 0
        endif
        if (v_value >= 0)
            sprintf ss, "%s\t%s\r", attr_names[iw], attr_values[iw]
            notebook $notebook_name text=ss
        endif
    endfor
end

static function /s show_preview_graph(data, [xdata])
    // displays a preview of one- or two-dimensional data
    wave data // data to be displayed. must either one-dimensional or two-dimensional
    wave xdata // positions on x axis
    
    dfref saveDF = GetDataFolderDFR()
    setdatafolder $package_path
    
    svar s_profiles_graph
    svar s_preview_file
    svar s_preview_source
    svar s_preview_trace_graph
    
    if ((strlen(s_profiles_graph) > 0) && (WinType(s_profiles_graph) == 1))
        KillWindow $s_profiles_graph
    endif
    if ((strlen(s_preview_trace_graph) > 0) && (WinType(s_preview_trace_graph) == 1))
        KillWindow $s_preview_trace_graph
    endif

    string graphname
    if (wavedims(data) == 2)
        s_profiles_graph = ad_display_profiles(data)
        ModifyGraph /w=$s_profiles_graph /z wbRGB=(48640,56832,60160)
        graphname = s_profiles_graph
    elseif (wavedims(data) == 1)
        duplicate /o data, preview_trace
        if (!ParamIsDefault(xdata))
            duplicate /o xdata, preview_trace_x
        else
            duplicate /o data, preview_trace_x
            preview_trace_x = x
            setscale d 0, 0, WaveUnits(data, 0), preview_trace_x
        endif
        s_preview_trace_graph = display_preview_trace(preview_trace_x, preview_trace)
        ModifyGraph /w=$s_preview_trace_graph wbRGB=(48640,56832,60160)
        graphname = s_preview_trace_graph
    else
        return ""
    endif
    
    string title = "Preview " + s_preview_file
    if (strlen(s_preview_source) > 0)
        title = title + " (" + s_preview_source[0,31] + ")"
    endif
    dowindow /f/t $graphname, title
    
    setdatafolder saveDF
    return graphname
end

static function /s display_preview_trace(xtrace, ytrace)
    wave xtrace
    wave ytrace
    
    display /n=pearl_explorer_1d /k=1 ytrace vs xtrace as "Preview"
    string graphname = s_name
    ModifyGraph /w=$graphname rgb[0]=(0,0,0)
    ModifyGraph /w=$graphname grid=2
    ModifyGraph /w=$graphname mirror=1
    ModifyGraph /w=$graphname minor=1
    ModifyGraph /w=$graphname axThick=0.5
    ModifyGraph /w=$graphname gridRGB=(52224,52224,52224)
    ModifyGraph /w=$graphname gridHair=0
    ModifyGraph /w=$graphname tick=0
    ModifyGraph /w=$graphname btLen=4
    
    // axis labels  
    string labels = note(ytrace)
    string lab
    lab = StringByKey("AxisLabelX", labels, "=", "\r")
    if (!strlen(lab))
        lab = "X"
    endif
    Label /w=$graphname bottom lab + " (\\U)"
    lab = StringByKey("AxisLabelD", labels, "=", "\r")
    if (!strlen(lab))
        lab = "value"
    endif
    Label /w=$graphname left lab + " (\\U)"
    
    return s_name
end

static function load_selected_files([options])
    string options
    
    dfref saveDF = GetDataFolderDFR()
    setdatafolder $package_path
    
    wave wSelectedFiles
    wave/t wtFiles
    variable nn = numpnts(wSelectedFiles)
    variable ii
    for (ii = 0; ii < nn; ii += 1)
        if (wSelectedFiles[ii])
            if (ParamIsDefault(options))
                load_file(wtFiles[ii])
            else
                load_file(wtFiles[ii], options=options)
            endif
        endif
    endfor
    
    update_datasets()
    setdatafolder saveDF
end

static function load_file(filename, [options])
    string filename
    string options
    
    dfref saveDF = GetDataFolderDFR()

    variable ft = pearl_file_type(filename)
    switch(ft)
        case 1:
            if (ParamIsDefault(options))
                load_pshell_file(filename)
            else
                load_pshell_file(filename, options=options)
            endif
            break
        case 2:
            if (ParamIsDefault(options))
                load_hdf_file(filename)
            else
                load_hdf_file(filename, options=options)
            endif
            break
        case 3:
            load_itx_file(filename)
            break
        case 4:
            load_mtrx_file(filename)
            break
        default:
            break
    endswitch

    setdatafolder saveDF
end

static function prompt_hdf_options(options)
    string &options

    string mode = StringByKey("mode", options, ":", ";")
    string reduction_func = StringByKey("reduction_func", options, ":", ";")
    
    string modes = "load_reduced"
    string reduction_functions = adh5_list_reduction_funcs()
    
    if (strlen(mode) == 0)
        mode = StringFromList(0, modes, ";")
    endif
    if (strlen(reduction_func) == 0)
        reduction_func = StringFromList(0, reduction_functions, ";")
    endif
    
    prompt mode, "Mode", popup, modes
    prompt reduction_func, "Reduction Function", popup, reduction_functions
    doprompt "HDF5 Loading Options", mode, reduction_func

    if (v_flag == 0)
        options = ReplaceStringByKey("mode", options, mode, ":", ";")
        options = ReplaceStringByKey("reduction_func", options, reduction_func, ":", ";")
    endif
    return v_flag // 0 = OK, 1 = cancel
end

function prompt_default_process(param)
    string &param
    
    return 0
end

function prompt_func_params(func_name, func_param)
    string func_name
    string &func_param
    
    string prompt_name = "prompt_" + func_name
    if (exists(prompt_name) == 6)
        funcref prompt_default_process prompt_func = $prompt_name
        return prompt_func(func_param)
    else
        // ignore missing prompt function
        return 0
    endif
end

static function /df load_pshell_file(filename, [options])
    string filename
    string options

    dfref saveDF = GetDataFolderDFR()
    string nickname = ad_suggest_foldername(filename)
    string loaded_filename = ""
    
    if (ParamIsDefault(options))
        loaded_filename = psh5_load_complete(nickname, "pearl_explorer_filepath", filename)
    else
        if (strlen(options) == 0)
            svar pref_options = $(package_path + "s_hdf_options")
            options = pref_options
            if (prompt_hdf_options(options) == 0)
                // OK
                pref_options = options
            else
                // cancel
                options = ""
            endif
        endif
        
        string mode = StringByKey("mode", options, ":", ";")
        
        strswitch(mode)
            case "load_reduced":
                string reduction_func = StringByKey("reduction_func", options, ":", ";")
                svar pref_params = $(package_path + "s_reduction_params")
                string reduction_params = pref_params
                if (prompt_func_params(reduction_func, reduction_params) == 0)
                    pref_params = reduction_params
                    print reduction_func, reduction_params
                    psh5_load_reduced(nickname, "pearl_explorer_filepath", filename, $reduction_func, reduction_params)
                    svar s_filepath
                    loaded_filename = s_filepath
                endif
                break
        endswitch
    endif

    dfref dataDF    
    if (strlen(loaded_filename) > 0)
        setdatafolder $("root:" + nickname)
        dataDF = GetDataFolderDFR()
        string /g pearl_explorer_import = "load_pshell_file"
    endif
    
    setdatafolder saveDF
    return dataDF
end

static function /df load_hdf_file(filename, [options])
    string filename
    string options

    dfref saveDF = GetDataFolderDFR()
    string nickname = ad_suggest_foldername(filename)
    string loaded_filename = ""
    
    if (ParamIsDefault(options))
        loaded_filename = adh5_load_complete(nickname, "pearl_explorer_filepath", filename)
    else
        if (strlen(options) == 0)
            svar pref_options = $(package_path + "s_hdf_options")
            options = pref_options
            if (prompt_hdf_options(options) == 0)
                // OK
                pref_options = options
            else
                // cancel
                options = ""
            endif
        endif
        
        string mode = StringByKey("mode", options, ":", ";")
        
        strswitch(mode)
            case "load_reduced":
                string reduction_func = StringByKey("reduction_func", options, ":", ";")
                svar pref_params = $(package_path + "s_reduction_params")
                string reduction_params = pref_params
                if (prompt_func_params(reduction_func, reduction_params) == 0)
                    pref_params = reduction_params
                    print reduction_func, reduction_params
                    loaded_filename = adh5_load_reduced(nickname, "pearl_explorer_filepath", filename, $reduction_func, reduction_params)
                endif
                break
        endswitch
    endif

    dfref dataDF    
    if (strlen(loaded_filename) > 0)
        setdatafolder $("root:" + nickname)
        dataDF = GetDataFolderDFR()
        string /g pearl_explorer_import = "load_hdf_file"
    endif
    
    setdatafolder saveDF
    return dataDF
end

static function /df load_itx_file(filename, [options])
    string filename
    string options

    dfref saveDF = GetDataFolderDFR()
    string nickname = itx_suggest_foldername(filename)

    if (ParamIsDefault(options))
        options = ""
    endif
    
    setdatafolder root:
    newdatafolder /s/o $("root:" + nickname)
    dfref dataDF = GetDataFolderDFR()
    
    // note: some versions of PEARL data files save data to a new data folder,
    // and leave the newly created folder as the current folder.
    // the free data folder is used by those files which don't create their own data folder.
    // this is the new recommended behaviour

    LoadWave /t/p=pearl_explorer_filepath/q filename
    svar waves = s_wavenames
    dfref actDF = GetDataFolderDFR()
    if (v_flag > 0)
        string /g pearl_explorer_import = "load_itx_file"
    endif
    
    if (!DataFolderRefsEqual(actDF, dataDF))
        // the file created its own data folder.
        // let's kill the pre-allocated folder
        setdatafolder dataDF
        if (ItemsInList(WaveList("*", ";", ""), ";") == 0)
            killdatafolder /z dataDF
        endif
    endif
    
    setdatafolder saveDF
    return actDF
end

static function /df load_mtrx_file(filename, [options])
    string filename
    string options

    dfref saveDF = GetDataFolderDFR()
    dfref dataDF = $""

#if exists("MFR_OpenResultFile")
    setdatafolder root:
    string datasets = ""
    datasets = mtrx_load_file("pearl_explorer_filepath", filename)
    if (strlen(datasets) > 0)
        string /g pearl_explorer_import = "load_mtrx_file"
        string s1 = StringFromList(0, datasets)
        wave w1 = $s1
        dataDF = GetWavesDataFolderDFR(w1)
    endif
#endif
    
    setdatafolder saveDF
    return dataDF
end

function /s itx_suggest_foldername(filename, [ignoredate,sourcename,unique])
    // suggests the name of a data folder based on a file name
    // if the file name follows the naming convention source-date-index.extension,
    // the function tries to generate the nick name as source_date_index.
    // otherwise it's just a cleaned up version of the file name.
    string filename // file name, including extension. can also include a folder path (which is ignored)
        // the extension is currently ignored, but may be used later to select the parent folder
    variable ignoredate // if non-zero, the nick name will not include the date part
        // defaults to zero
    string sourcename // nick name of the data source
        // the function tries to detect the source from the file name
        // this option can be used to override auto-detection
        // allowed values: sscan, otf
    variable unique // if non-zero, the resulting name is made a unique data folder name in the current data folder
        // defaults to zero
    
    if (ParamIsDefault(ignoredate))
        ignoredate = 0
    endif
    if (ParamIsDefault(unique))
        unique = 0
    endif
    
    string basename = ParseFilePath(3, filename, ":", 0, 0)
    string extension = ParseFilePath(4, filename, ":", 0, 0)
    string nickname
    
    string autosource
    if (strsearch(basename, "X03DA_PC", 0, 2) >= 0)
        autosource = "sscan"
        basename = ReplaceString("_", basename, "-")
        ignoredate = 1
    elseif (strsearch(basename, "otf", 0, 2) >= 0)
        autosource = "otf"
    endif
    if (ParamIsDefault(sourcename))
        sourcename = autosource
    endif
    
    variable nparts = ItemsInList(basename, "-")
    if (nparts >= 3)
        string datepart = StringFromList(nparts - 2, basename, "-")
        string indexpart = StringFromList(nparts - 1, basename, "-")
        if (ignoredate)
            sprintf nickname, "%s_%s", sourcename, indexpart
        else
            sprintf nickname, "%s_%s_%s", sourcename, datepart, indexpart
        endif
    else
        nickname = CleanupName(basename, 0)
    endif
    
    if (unique && CheckName(nickname, 11))
        nickname = UniqueName(nickname + "_", 11, 0)
    endif
    
    return nickname
end

Window PearlDataExplorer() : Panel
    PauseUpdate; Silent 1       // building window...
    NewPanel /K=1 /W=(800,0,1530,444) as "PEARL Data Explorer"
    ModifyPanel cbRGB=(48640,56832,60160)
    
    GroupBox gb_filepath,pos={8,4},size={224,52},title="file system folder"
    TitleBox tb_filepath,pos={20,24},size={174,20},frame=2
    TitleBox tb_filepath,variable=root:packages:pearl_explorer:s_filepath,fixedSize=1
    Button b_browse_filepath,pos={200,24},size={20,20},proc=PearlDataExplorer#bp_browse_filepath,title="..."
    Button b_browse_filepath,fColor=(65280,48896,32768)
    
    GroupBox gb_prefs,pos={240,4},size={58,52},title="prefs",help={"explorer package preferences"}
    Button b_save_prefs,pos={252,20},size={32,17},proc=PearlDataExplorer#bp_save_prefs,title="save"
    Button b_save_prefs,help={"save preferences of the data explorer package (data file path, attributes filter)"}
    Button b_save_prefs,fColor=(65280,48896,32768)
    Button b_load_prefs,pos={252,36},size={32,17},proc=PearlDataExplorer#bp_load_prefs,title="load"
    Button b_load_prefs,help={"load preferences of the data explorer package"}
    Button b_load_prefs,fColor=(65280,48896,32768)
    
    GroupBox gb_filelist,pos={8,64},size={224,372},title="data files"
    ListBox lb_files,pos={20,84},size={200,212},proc=PearlDataExplorer#lbp_filelist
    ListBox lb_files,listWave=root:packages:pearl_explorer:wtFiles
    ListBox lb_files,selWave=root:packages:pearl_explorer:wSelectedFiles,row= 11,mode= 4
    TitleBox tb_file_info,pos={20,300},size={198,78},frame=2,fixedSize=1
    TitleBox tb_file_info,variable= root:packages:pearl_explorer:s_file_info

    Button b_update_filelist,pos={20,386},size={60,20},proc=PearlDataExplorer#bp_update_filelist,title="update list"
    Button b_update_filelist,fColor=(65280,48896,32768)
    CheckBox cb_file_preview,pos={84,390},size={60,20},title="preview"
    CheckBox cb_file_preview,help={"enable/disable automatic preview window when selecting a data file"}
    CheckBox cb_file_preview,value=1
    Button b_file_prev,pos={176,386},size={20,20},proc=PearlDataExplorer#bp_file_prev,title="\\W646"
    Button b_file_prev,help={"previous file"}
    Button b_file_prev,fColor=(65280,48896,32768)
    Button b_file_next,pos={200,386},size={20,20},proc=PearlDataExplorer#bp_file_next,title="\\W649"
    Button b_file_next,help={"next file"}
    Button b_file_next,fColor=(65280,48896,32768)

    Button b_load_files,pos={20,410},size={76,20},proc=PearlDataExplorer#bp_load_files,title="load complete"
    Button b_load_files,help={"load the complete contents from the selected files"}
    Button b_load_files,fColor=(65280,48896,32768)
    Button b_load_files_opt,pos={100,410},size={76,20},proc=PearlDataExplorer#bp_load_files_opt,title="load reduced"
    Button b_load_files_opt,help={"load data from the selected files with options (reduced dimensions)"}
    Button b_load_files_opt,fColor=(65280,48896,32768)

    // datasets group   
    GroupBox gb_datasets,pos={240,64},size={224,372},title="datasets"
    ListBox lb_datasets,pos={252,84},size={200,300},proc=PearlDataExplorer#lbp_datasets,help={"list of loaded datasets"}
    ListBox lb_datasets,listWave=root:packages:pearl_explorer:wtDatasets
    ListBox lb_datasets,selWave=root:packages:pearl_explorer:wSelectedDatasets,mode= 1
    ListBox lb_datasets,selRow= -1

    Button b_update_datasets,pos={252,386},size={60,20},proc=PearlDataExplorer#bp_update_datasets,title="update list"
    Button b_update_datasets,help={"update the list of datasets"}
    Button b_update_datasets,fColor=(65280,48896,32768)
    CheckBox cb_dataset_preview,pos={316,390},size={60,20},title="preview"
    CheckBox cb_dataset_preview,help={"enable/disable automatic preview window when selecting a dataset"}
    CheckBox cb_dataset_preview,value=0
    Button b_dataset_prev,pos={408,386},size={20,20},proc=PearlDataExplorer#bp_dataset_prev,title="\\W646"
    Button b_dataset_prev,help={"goto previous dataset"}
    Button b_dataset_prev,fColor=(65280,48896,32768)
    Button b_dataset_next,pos={432,386},size={20,20},proc=PearlDataExplorer#bp_dataset_next,title="\\W649"
    Button b_dataset_next,help={"goto next dataset"}
    Button b_dataset_next,fColor=(65280,48896,32768)
    
    Button b_dataset_folder,pos={252,410},size={50,20},proc=PearlDataExplorer#bp_dataset_folder,title="goto DF"
    Button b_dataset_folder,help={"set the current data folder of the selected dataset"}
    Button b_dataset_folder,fColor=(65280,48896,32768)
    Button b_dataset_display,pos={306,410},size={50,20},proc=PearlDataExplorer#bp_dataset_display,title="display"
    Button b_dataset_display,help={"display the selected dataset in its own window"}
    Button b_dataset_display,fColor=(65280,48896,32768)

    GroupBox gb_preview,pos={472,4},size={250,52},title="preview"
    TitleBox tb_preview_file,pos={484,24},size={226,20},frame=2
    TitleBox tb_preview_file,variable=root:packages:pearl_explorer:s_preview_file,fixedSize=1

    GroupBox gb_attributes,pos={472,64},size={250,372},title="attributes"
    Button b_attr_notebook,pos={484,386},size={60,20},proc=PearlDataExplorer#bp_attr_notebook,title="notebook"
    Button b_attr_notebook,help={"show attribute list in a notebook"}
    Button b_attr_notebook,fColor=(65280,48896,32768)

    String fldrSav0= GetDataFolder(1)
    SetDataFolder root:packages:pearl_explorer:
    Edit/W=(484,84,710,384)/HOST=#  attr_names,attr_values
    ModifyTable format(Point)=1,width(Point)=0,width(attr_names)=103,width(attr_values)=103
    ModifyTable statsArea=85
    SetDataFolder fldrSav0
    RenameWindow #,T0
    SetActiveSubwindow ##
EndMacro

static function bp_load_prefs(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    switch( ba.eventCode )
        case 2: // mouse up
            load_prefs()
            break
        case -1: // control being killed
            break
    endswitch

    return 0
End

static function bp_save_prefs(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    switch( ba.eventCode )
        case 2: // mouse up
            save_prefs()
            break
        case -1: // control being killed
            break
    endswitch

    return 0
End

static function bp_browse_filepath(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    dfref saveDF = GetDataFolderDFR()

    switch( ba.eventCode )
        case 2: // mouse up
            PathInfo /S pearl_explorer_filepath
            NewPath /M="select data file folder" /O/Z pearl_explorer_filepath
            if (v_flag == 0)
                PathInfo /S pearl_explorer_filepath
                svar filepath = $(package_path + "s_filepath")
                filepath = s_path
                update_filelist()
            endif
            break
        case -1: // control being killed
            break
    endswitch

    setdatafolder saveDF
    return 0
End

static function bp_update_filelist(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    switch( ba.eventCode )
        case 2: // mouse up
            update_filelist()
            break
        case -1: // control being killed
            break
    endswitch

    return 0
End

static function bp_load_files(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    switch( ba.eventCode )
        case 2: // mouse up
            load_selected_files()
            break
        case -1: // control being killed
            break
    endswitch

    return 0
End

static function bp_load_files_opt(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    switch( ba.eventCode )
        case 2: // mouse up
            load_selected_files(options="")
            break
        case -1: // control being killed
            break
    endswitch

    return 0
End

static function bp_file_next(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    dfref saveDF = GetDataFolderDFR()
    
    switch( ba.eventCode )
        case 2: // mouse up
            setdatafolder $package_path
            wave /t wtFiles
            wave wSelectedFiles
            FindValue /i=1 wSelectedFiles
            v_value += 1
            if (v_value >= numpnts(wtFiles))
                v_value = min(numpnts(wtFiles) - 1, 0)
            endif
            wSelectedFiles = p == v_value
            if (v_value >= 0)
                variable ifile = v_value
                ControlInfo /W=PearlDataExplorer cb_file_preview
                if (v_value)
                    preview_file(wtFiles[ifile])
                endif
            endif
            break
        case -1: // control being killed
            break
    endswitch

    setdatafolder saveDF
    return 0
End

static function bp_file_prev(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    dfref saveDF = GetDataFolderDFR()
    
    switch( ba.eventCode )
        case 2: // mouse up
            setdatafolder $package_path
            wave /t wtFiles
            wave wSelectedFiles
            FindValue /i=1 wSelectedFiles
            v_value -= 1
            if (v_value < 0)
                v_value = numpnts(wtFiles) - 1
            endif
            wSelectedFiles = p == v_value
            if (v_value >= 0)
                variable ifile = v_value
                ControlInfo /W=PearlDataExplorer cb_file_preview
                if (v_value)
                    preview_file(wtFiles[ifile])
                endif
            endif
            break
        case -1: // control being killed
            break
    endswitch

    setdatafolder saveDF
    return 0
End

static function lbp_filelist(lba) : ListBoxControl
    STRUCT WMListboxAction &lba

    Variable row = lba.row
    Variable col = lba.col
    WAVE/T/Z listWave = lba.listWave
    WAVE/Z selWave = lba.selWave

    switch( lba.eventCode )
        case -1: // control being killed
            break
        case 1: // mouse down
            if (selWave[row])
                ControlInfo /W=PearlDataExplorer cb_file_preview
                if (v_value)
                    preview_file(listWave[row])
                endif
            endif
            break
        case 3: // double click
            break
        case 4: // cell selection
        case 5: // cell selection plus shift key
            break
        case 6: // begin edit
            break
        case 7: // finish edit
            break
        case 13: // checkbox clicked (Igor 6.2 or later)
            break
    endswitch

    return 0
End

static function bp_update_datasets(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    switch( ba.eventCode )
        case 2: // mouse up
            update_datasets()
            break
        case -1: // control being killed
            break
    endswitch

    return 0
End

static function bp_dataset_folder(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    switch( ba.eventCode )
        case 2: // mouse up
            ControlInfo /W=PearlDataExplorer lb_datasets
            if (v_value >= 0)
                setdatafolder $package_path
                wave /t wtDatasets
                string dataset = wtDatasets[v_value]
                string cmd
                sprintf cmd, "setdatafolder root:%s", PossiblyQuoteName(dataset)
                execute /q /z cmd
                cmd = "setdatafolder :scan1"
                execute /q /z cmd
                sprintf cmd, "setdatafolder %s", GetDataFolder(1)
                print cmd
            endif
            break
        case -1: // control being killed
            break
    endswitch

    return 0
End

static function bp_dataset_display(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    switch( ba.eventCode )
        case 2: // mouse up
            ControlInfo /W=PearlDataExplorer lb_datasets
            if (v_value >= 0)
                setdatafolder $package_path
                wave /t wtDatasets
                string dataset = wtDatasets[v_value]
                display_dataset(dataset)
            endif
            break
        case -1: // control being killed
            break
    endswitch

    return 0
End

static function bp_dataset_next(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    switch( ba.eventCode )
        case 2: // mouse up
            ControlInfo /W=PearlDataExplorer lb_datasets
            wave /t wtDatasets = $(s_datafolder + s_value)
            v_value += 1
            if (v_value >= numpnts(wtDatasets))
                v_value = min(0, numpnts(wtDatasets) - 1)
            endif
            ListBox lb_datasets win=PearlDataExplorer, selRow=v_value
            if (v_value >= 0)
                variable ids = v_value
                ControlInfo /W=PearlDataExplorer cb_dataset_preview
                if (v_value)
                    preview_dataset(wtDatasets[ids])
                endif
            endif
            break
        case -1: // control being killed
            break
    endswitch

    return 0
End

static function bp_dataset_prev(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    switch( ba.eventCode )
        case 2: // mouse up
            ControlInfo /W=PearlDataExplorer lb_datasets
            wave /t wtDatasets = $(s_datafolder + s_value)
            v_value -= 1
            if (v_value < 0)
                v_value = max(-1, numpnts(wtDatasets) - 1)
            endif
            ListBox lb_datasets win=PearlDataExplorer, selRow=v_value
            if (v_value >= 0)
                variable ids = v_value
                ControlInfo /W=PearlDataExplorer cb_dataset_preview
                if (v_value)
                    preview_dataset(wtDatasets[ids])
                endif
            endif
            break
        case -1: // control being killed
            break
    endswitch

    return 0
End

static function lbp_datasets(lba) : ListBoxControl
    STRUCT WMListboxAction &lba

    Variable row = lba.row
    Variable col = lba.col
    WAVE/T/Z listWave = lba.listWave
    WAVE/Z selWave = lba.selWave

    switch( lba.eventCode )
        case -1: // control being killed
            break
        case 1: // mouse down
            if (row >= 0)
                ControlInfo /W=PearlDataExplorer cb_dataset_preview
                if (v_value)
                    preview_dataset(listWave[row])
                endif
            endif
            break
        case 3: // double click
            break
        case 4: // cell selection
        case 5: // cell selection plus shift key
            break
        case 6: // begin edit
            break
        case 7: // finish edit
            break
        case 13: // checkbox clicked (Igor 6.2 or later)
            break
    endswitch

    return 0
End

static function bp_attr_notebook(ba) : ButtonControl
    STRUCT WMButtonAction &ba

    dfref saveDF = GetDataFolderDFR()

    switch( ba.eventCode )
        case 2: // mouse up
            setdatafolder $package_path
            svar s_preview_file
            wave /t /z attr_names
            wave /t /z attr_values
            if (WaveExists(attr_names))
                attributes_notebook(attr_names, attr_values, s_preview_file)
            endif
            break
        case -1: // control being killed
            break
    endswitch

    setdatafolder saveDF
    return 0
End