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authorJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-16 18:49:26 +0900
committerJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-30 00:39:06 +0900
commitfcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch)
tree64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/ext/tk/sample/demos-en/image3.rb
Fresh start
Diffstat (limited to 'jni/ruby/ext/tk/sample/demos-en/image3.rb')
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diff --git a/jni/ruby/ext/tk/sample/demos-en/image3.rb b/jni/ruby/ext/tk/sample/demos-en/image3.rb
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+# 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)
+