mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
287a34ae0d
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@22784 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
125 lines
3.6 KiB
Ruby
125 lines
3.6 KiB
Ruby
# image3.rb
|
|
#
|
|
# This demonstration script creates a simple collection of widgets
|
|
# that allow you to select and view images in a Tk label.
|
|
#
|
|
# widget demo 'load image' (called by 'widget')
|
|
#
|
|
|
|
# toplevel widget
|
|
if defined?($image3_demo) && $image3_demo
|
|
$image3_demo.destroy
|
|
$image3_demo = nil
|
|
end
|
|
|
|
# demo toplevel widget
|
|
$image3_demo = TkToplevel.new {|w|
|
|
title('Image Demonstration #3')
|
|
iconname("Image3")
|
|
positionWindow(w)
|
|
}
|
|
|
|
base_frame = TkFrame.new($image3_demo).pack(:fill=>:both, :expand=>true)
|
|
|
|
#
|
|
def loadDir3(w)
|
|
w.delete(0,'end')
|
|
Dir.glob([$dirName,'*'].join(File::Separator)).sort.each{|f|
|
|
w.insert('end',File.basename(f))
|
|
}
|
|
end
|
|
|
|
# selectAndLoadDir3 --
|
|
# This procedure pops up a dialog to ask for a directory to load into
|
|
# the listobx and (if the user presses OK) reloads the directory
|
|
# listbox from the directory named in the demo's entry.
|
|
#
|
|
# Arguments:
|
|
# w - Name of the toplevel window of the demo.
|
|
def selectAndLoadDir3(w, lbox)
|
|
dir = Tk.chooseDirectory(:initialdir=>$dirName.value,
|
|
:parent=>w, :mustexist=>true)
|
|
if dir.length > 0
|
|
$dirName.value = dir
|
|
loadDir3(lbox)
|
|
end
|
|
end
|
|
|
|
def loadImage(w,x,y)
|
|
$image3a.file([$dirName, w.get("@#{x},#{y}")].join(File::Separator))
|
|
end
|
|
|
|
|
|
# label
|
|
msg = TkLabel.new(base_frame) {
|
|
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."
|
|
}
|
|
msg.pack('side'=>'top')
|
|
|
|
# frame
|
|
TkFrame.new(base_frame) {|frame|
|
|
TkButton.new(frame) {
|
|
text 'Dismiss'
|
|
command proc{
|
|
tmppath = $image3_demo
|
|
$image3_demo = nil
|
|
tmppath.destroy
|
|
}
|
|
}.pack('side'=>'left', 'expand'=>'yes')
|
|
|
|
TkButton.new(frame) {
|
|
text 'Show Code'
|
|
command proc{showCode 'image3'}
|
|
}.pack('side'=>'left', 'expand'=>'yes')
|
|
|
|
}.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')
|
|
|
|
# variable
|
|
$dirName = TkVariable.new([$demo_dir,'..','images'].join(File::Separator))
|
|
|
|
# image
|
|
begin
|
|
$image3a.delete
|
|
rescue
|
|
end
|
|
$image3a = TkPhotoImage.new
|
|
|
|
#
|
|
image3_f = TkFrame.new(base_frame).pack(:fill=>:both, :expand=>true)
|
|
|
|
image3_df = TkLabelFrame.new(base_frame, :text=>'Directory:')
|
|
|
|
image3_ff = TkLabelFrame.new(base_frame, :text=>'File:',
|
|
:padx=>'2m', :pady=>'2m')
|
|
image3_lbx = TkListbox.new(image3_ff, :width=>20, :height=>10) {
|
|
pack(:side=>:left, :fill=>:y, :expand=>true)
|
|
yscrollbar(TkScrollbar.new(image3_ff).pack(:side=>:left, :fill=>:y,
|
|
:expand=>true))
|
|
insert(0, *(%w(earth.gif earthris.gif teapot.ppm)))
|
|
bind('Double-1', proc{|x,y| loadImage(self, x, y)}, '%x %y')
|
|
}
|
|
|
|
image3_ent = TkEntry.new(image3_df, :width=>30, :textvariable=>$dirName){
|
|
pack(:side=>:left, :fill=>:both, :padx=>'2m', :pady=>'2m', :expand=>true)
|
|
bind('Return', proc{loadDir3(image3_lbx)})
|
|
}
|
|
|
|
TkButton.new(image3_df, :pady=>0, :padx=>'2m', :text=>"Select Dir.",
|
|
:command=>proc{selectAndLoadDir3(image3_ent, image3_lbx)}) {
|
|
pack(:side=>:left, :fill=>:y, :padx=>[0, '2m'], :pady=>'2m')
|
|
}
|
|
|
|
image3_if = TkLabelFrame.new(base_frame, :text=>'Image:') {|f|
|
|
# TkLabel.new(f, :image=>$image3a).pack(:padx=>'2m', :pady=>'2m')
|
|
Tk::Label.new(f, :image=>$image3a).pack(:padx=>'2m', :pady=>'2m')
|
|
}
|
|
|
|
Tk.grid(image3_df, '-',
|
|
:sticky=>:ew, :padx=>'1m', :pady=>'1m', :in=>image3_f)
|
|
Tk.grid(image3_ff, image3_if,
|
|
:sticky=>:nw, :padx=>'1m', :pady=>'1m', :in=>image3_f)
|
|
TkGrid.columnconfigure(image3_f, 1, :weight=>1)
|
|
|