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