1 | # image2.tcl -- |
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2 | # |
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3 | # This demonstration script creates a simple collection of widgets |
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4 | # that allow you to select and view images in a Tk label. |
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5 | # |
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6 | # RCS: @(#) $Id: image2.tcl,v 1.6 2002/08/12 13:38:48 dkf Exp $ |
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7 | |
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8 | if {![info exists widgetDemo]} { |
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9 | error "This script should be run from the \"widget\" demo." |
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10 | } |
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11 | |
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12 | # loadDir -- |
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13 | # This procedure reloads the directory listbox from the directory |
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14 | # named in the demo's entry. |
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15 | # |
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16 | # Arguments: |
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17 | # w - Name of the toplevel window of the demo. |
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18 | |
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19 | proc loadDir w { |
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20 | global dirName |
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21 | |
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22 | $w.f.list delete 0 end |
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23 | foreach i [lsort [glob -directory $dirName *]] { |
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24 | $w.f.list insert end [file tail $i] |
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25 | } |
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26 | } |
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27 | |
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28 | # selectAndLoadDir -- |
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29 | # This procedure pops up a dialog to ask for a directory to load into |
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30 | # the listobx and (if the user presses OK) reloads the directory |
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31 | # listbox from the directory named in the demo's entry. |
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32 | # |
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33 | # Arguments: |
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34 | # w - Name of the toplevel window of the demo. |
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35 | |
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36 | proc selectAndLoadDir w { |
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37 | global dirName |
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38 | set dir [tk_chooseDirectory -initialdir $dirName -parent $w -mustexist 1] |
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39 | if {[string length $dir] != 0} { |
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40 | set dirName $dir |
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41 | loadDir $w |
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42 | } |
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43 | } |
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44 | |
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45 | # loadImage -- |
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46 | # Given the name of the toplevel window of the demo and the mouse |
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47 | # position, extracts the directory entry under the mouse and loads |
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48 | # that file into a photo image for display. |
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49 | # |
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50 | # Arguments: |
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51 | # w - Name of the toplevel window of the demo. |
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52 | # x, y- Mouse position within the listbox. |
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53 | |
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54 | proc loadImage {w x y} { |
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55 | global dirName |
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56 | |
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57 | set file [file join $dirName [$w.f.list get @$x,$y]] |
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58 | image2a configure -file $file |
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59 | } |
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60 | |
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61 | set w .image2 |
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62 | catch {destroy $w} |
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63 | toplevel $w |
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64 | wm title $w "Image Demonstration #2" |
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65 | wm iconname $w "Image2" |
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66 | positionWindow $w |
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67 | |
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68 | label $w.msg -font $font -wraplength 4i -justify left -text "This demonstration allows you to view images using a Tk \"photo\" image. First type a directory name in the listbox, then type Return to load the directory into the listbox. Then double-click on a file name in the listbox to see that image." |
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69 | pack $w.msg -side top |
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70 | |
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71 | frame $w.buttons |
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72 | pack $w.buttons -side bottom -fill x -pady 2m |
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73 | button $w.buttons.dismiss -text Dismiss -command "destroy $w" |
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74 | button $w.buttons.code -text "See Code" -command "showCode $w" |
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75 | pack $w.buttons.dismiss $w.buttons.code -side left -expand 1 |
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76 | |
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77 | frame $w.mid |
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78 | pack $w.mid -fill both -expand 1 |
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79 | |
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80 | labelframe $w.dir -text "Directory:" |
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81 | set dirName [file join $tk_library demos images] |
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82 | entry $w.dir.e -width 30 -textvariable dirName |
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83 | button $w.dir.b -pady 0 -padx 2m -text "Select Dir." \ |
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84 | -command "selectAndLoadDir $w" |
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85 | bind $w.dir.e <Return> "loadDir $w" |
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86 | pack $w.dir.e -side left -fill both -padx 2m -pady 2m -expand true |
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87 | pack $w.dir.b -side left -fill y -padx {0 2m} -pady 2m |
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88 | labelframe $w.f -text "File:" -padx 2m -pady 2m |
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89 | |
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90 | listbox $w.f.list -width 20 -height 10 -yscrollcommand "$w.f.scroll set" |
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91 | scrollbar $w.f.scroll -command "$w.f.list yview" |
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92 | pack $w.f.list $w.f.scroll -side left -fill y -expand 1 |
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93 | $w.f.list insert 0 earth.gif earthris.gif teapot.ppm |
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94 | bind $w.f.list <Double-1> "loadImage $w %x %y" |
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95 | |
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96 | catch {image delete image2a} |
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97 | image create photo image2a |
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98 | labelframe $w.image -text "Image:" |
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99 | label $w.image.image -image image2a |
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100 | pack $w.image.image -padx 2m -pady 2m |
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101 | |
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102 | grid $w.dir - -sticky ew -padx 1m -pady 1m -in $w.mid |
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103 | grid $w.f $w.image -sticky nw -padx 1m -pady 1m -in $w.mid |
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104 | grid columnconfigure $w.mid 1 -weight 1 |
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