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# 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 1.6 2002/08/12 13:38:48 dkf 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 -directory $dirName *]] { $w.f.list insert end [file tail $i] } }
# selectAndLoadDir -- # This procedure pops up a dialog to ask for a directory to load into # the listobx and (if the user presses OK) reloads the directory # listbox from the directory named in the demo's entry. # # Arguments: # w - Name of the toplevel window of the demo.
proc selectAndLoadDir w { global dirName set dir [tk_chooseDirectory -initialdir $dirName -parent $w -mustexist 1] if {[string length $dir] != 0} { set dirName $dir loadDir $w } }
# 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
frame $w.mid pack $w.mid -fill both -expand 1
labelframe $w.dir -text "Directory:" set dirName [file join $tk_library demos images] entry $w.dir.e -width 30 -textvariable dirName button $w.dir.b -pady 0 -padx 2m -text "Select Dir." \ -command "selectAndLoadDir $w" bind $w.dir.e <Return> "loadDir $w" pack $w.dir.e -side left -fill both -padx 2m -pady 2m -expand true pack $w.dir.b -side left -fill y -padx {0 2m} -pady 2m labelframe $w.f -text "File:" -padx 2m -pady 2m
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 <Double-1> "loadImage $w %x %y"
catch {image delete image2a} image create photo image2a labelframe $w.image -text "Image:" label $w.image.image -image image2a pack $w.image.image -padx 2m -pady 2m
grid $w.dir - -sticky ew -padx 1m -pady 1m -in $w.mid grid $w.f $w.image -sticky nw -padx 1m -pady 1m -in $w.mid grid columnconfigure $w.mid 1 -weight 1
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