[37] | 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 1.2 1998/09/14 18:23:29 stanton 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 [file join $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 | # loadImage -- |
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| 29 | # Given the name of the toplevel window of the demo and the mouse |
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| 30 | # position, extracts the directory entry under the mouse and loads |
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| 31 | # that file into a photo image for display. |
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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 | # x, y- Mouse position within the listbox. |
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| 36 | |
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| 37 | proc loadImage {w x y} { |
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| 38 | global dirName |
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| 39 | |
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| 40 | set file [file join $dirName [$w.f.list get @$x,$y]] |
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| 41 | image2a configure -file $file |
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| 42 | } |
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| 43 | |
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| 44 | set w .image2 |
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| 45 | catch {destroy $w} |
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| 46 | toplevel $w |
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| 47 | wm title $w "Image Demonstration #2" |
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| 48 | wm iconname $w "Image2" |
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| 49 | positionWindow $w |
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| 50 | |
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| 51 | 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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| 52 | pack $w.msg -side top |
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| 53 | |
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| 54 | frame $w.buttons |
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| 55 | pack $w.buttons -side bottom -fill x -pady 2m |
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| 56 | button $w.buttons.dismiss -text Dismiss -command "destroy $w" |
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| 57 | button $w.buttons.code -text "See Code" -command "showCode $w" |
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| 58 | pack $w.buttons.dismiss $w.buttons.code -side left -expand 1 |
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| 59 | |
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| 60 | label $w.dirLabel -text "Directory:" |
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| 61 | set dirName [file join $tk_library demos images] |
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| 62 | entry $w.dirName -width 30 -textvariable dirName |
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| 63 | bind $w.dirName <Return> "loadDir $w" |
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| 64 | frame $w.spacer1 -height 3m -width 20 |
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| 65 | label $w.fileLabel -text "File:" |
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| 66 | frame $w.f |
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| 67 | pack $w.dirLabel $w.dirName $w.spacer1 $w.fileLabel $w.f -side top -anchor w |
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| 68 | |
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| 69 | listbox $w.f.list -width 20 -height 10 -yscrollcommand "$w.f.scroll set" |
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| 70 | scrollbar $w.f.scroll -command "$w.f.list yview" |
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| 71 | pack $w.f.list $w.f.scroll -side left -fill y -expand 1 |
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| 72 | $w.f.list insert 0 earth.gif earthris.gif teapot.ppm |
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| 73 | bind $w.f.list <Double-1> "loadImage $w %x %y" |
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| 74 | |
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| 75 | catch {image delete image2a} |
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| 76 | image create photo image2a |
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| 77 | frame $w.spacer2 -height 3m -width 20 |
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| 78 | label $w.imageLabel -text "Image:" |
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| 79 | label $w.image -image image2a |
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| 80 | pack $w.spacer2 $w.imageLabel $w.image -side top -anchor w |
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