# image2.tcl -- # # This demonstration script creates a simple collection of widgets # that allow you to select and view images in a Tk label. # # RCS: @(#) $Id: image2.tcl,v 1.1.4.1 1998/09/30 02:17:48 stanton Exp $ if {![info exists widgetDemo]} { error "This script should be run from the \"widget\" demo." } # loadDir -- # This procedure reloads the directory listbox from the directory # named in the demo's entry. # # Arguments: # w - Name of the toplevel window of the demo. proc loadDir w { global dirName $w.f.list delete 0 end foreach i [lsort [glob [file join $dirName *]]] { $w.f.list insert end [file tail $i] } } # loadImage -- # Given the name of the toplevel window of the demo and the mouse # position, extracts the directory entry under the mouse and loads # that file into a photo image for display. # # Arguments: # w - Name of the toplevel window of the demo. # x, y- Mouse position within the listbox. proc loadImage {w x y} { global dirName set file [file join $dirName [$w.f.list get @$x,$y]] image2a configure -file $file } set w .image2 catch {destroy $w} toplevel $w wm title $w "Image Demonstration #2" wm iconname $w "Image2" positionWindow $w 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." pack $w.msg -side top frame $w.buttons pack $w.buttons -side bottom -fill x -pady 2m button $w.buttons.dismiss -text Dismiss -command "destroy $w" button $w.buttons.code -text "See Code" -command "showCode $w" pack $w.buttons.dismiss $w.buttons.code -side left -expand 1 label $w.dirLabel -text "Directory:" set dirName [file join $tk_library demos images] entry $w.dirName -width 30 -textvariable dirName bind $w.dirName "loadDir $w" frame $w.spacer1 -height 3m -width 20 label $w.fileLabel -text "File:" frame $w.f pack $w.dirLabel $w.dirName $w.spacer1 $w.fileLabel $w.f -side top -anchor w listbox $w.f.list -width 20 -height 10 -yscrollcommand "$w.f.scroll set" scrollbar $w.f.scroll -command "$w.f.list yview" pack $w.f.list $w.f.scroll -side left -fill y -expand 1 $w.f.list insert 0 earth.gif earthris.gif teapot.ppm bind $w.f.list "loadImage $w %x %y" catch {image delete image2a} image create photo image2a frame $w.spacer2 -height 3m -width 20 label $w.imageLabel -text "Image:" label $w.image -image image2a pack $w.spacer2 $w.imageLabel $w.image -side top -anchor w