English
- # 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
