77 lines
2.4 KiB
Tcl
77 lines
2.4 KiB
Tcl
|
# image2.tcl --
|
||
|
|
#
|
||
|
|
# This demonstration script creates a simple collection of widgets
|
||
|
|
# that allow you to select and view images in a Tk label.
|
||
|
|
#
|
||
|
|
# SCCS: @(#) image2.tcl 1.8 96/08/20 16:53:29
|
||
|
|
|
||
|
|
# 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 <Return> "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 <Double-1> "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
|