1# image2.rb 2# 3# This demonstration script creates a simple collection of widgets 4# that allow you to select and view images in a Tk label. 5# 6# widget demo 'load image' (called by 'widget') 7# 8 9# toplevel widget 10if defined?($image2_demo) && $image2_demo 11 $image2_demo.destroy 12 $image2_demo = nil 13end 14 15# demo toplevel widget 16$image2_demo = TkToplevel.new {|w| 17 title('Image Demonstration #2') 18 iconname("Image2") 19 positionWindow(w) 20} 21 22base_frame = TkFrame.new($image2_demo).pack(:fill=>:both, :expand=>true) 23 24# label 25msg = TkLabel.new(base_frame) { 26 font $font 27 wraplength '4i' 28 justify 'left' 29 text "This demonstration allows you to view images using a Tk \"photo\" image. First type a directory name in the listbox, then press Enter to load the directory into the listbox. Then double-click on a file name in the listbox to see that image." 30} 31msg.pack('side'=>'top') 32 33# frame 34TkFrame.new(base_frame) {|frame| 35 TkButton.new(frame) { 36 text 'Dismiss' 37 command proc{ 38 tmppath = $image2_demo 39 $image2_demo = nil 40 tmppath.destroy 41 } 42 }.pack('side'=>'left', 'expand'=>'yes') 43 44 TkButton.new(frame) { 45 text 'Show Code' 46 command proc{showCode 'image2'} 47 }.pack('side'=>'left', 'expand'=>'yes') 48 49}.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m') 50 51# create variable 52$dirName = TkVariable.new([$demo_dir,'..','images'].join(File::Separator)) 53 54# image 55$image2a = TkPhotoImage.new 56 57# 58TkLabel.new(base_frame, 'text'=>'Directory:')\ 59.pack('side'=>'top', 'anchor'=>'w') 60 61image2_e = TkEntry.new(base_frame) { 62 width 30 63 textvariable $dirName 64}.pack('side'=>'top', 'anchor'=>'w') 65 66TkFrame.new(base_frame, 'height'=>'3m', 'width'=>20)\ 67.pack('side'=>'top', 'anchor'=>'w') 68 69TkLabel.new(base_frame, 'text'=>'File:')\ 70.pack('side'=>'top', 'anchor'=>'w') 71 72TkFrame.new(base_frame){|w| 73 s = TkScrollbar.new(w) 74 l = TkListbox.new(w) { 75 width 20 76 height 10 77 yscrollcommand proc{|first,last| s.set first,last} 78 } 79 s.command(proc{|*args| l.yview(*args)}) 80 l.pack('side'=>'left', 'expand'=>'yes', 'fill'=>'y') 81 s.pack('side'=>'left', 'expand'=>'yes', 'fill'=>'y') 82 #l.insert(0,'earth.gif', 'earthris.gif', 'mickey.gif', 'teapot.ppm') 83 l.insert(0,'earth.gif', 'earthris.gif', 'teapot.ppm') 84 l.bind('Double-1', proc{|x,y| loadImage $image2a,l,x,y}, '%x %y') 85 86 image2_e.bind 'Return', proc{loadDir l} 87 88}.pack('side'=>'top', 'anchor'=>'w') 89 90# image 91[ TkFrame.new(base_frame, 'height'=>'3m', 'width'=>20), 92 TkLabel.new(base_frame, 'text'=>'Image:'), 93 TkLabel.new(base_frame, 'image'=>$image2a) 94].each{|w| w.pack('side'=>'top', 'anchor'=>'w')} 95 96# 97def loadDir(w) 98 w.delete(0,'end') 99 Dir.glob([$dirName,'*'].join(File::Separator)).sort.each{|f| 100 w.insert('end',File.basename(f)) 101 } 102end 103 104def loadImage(img,w,x,y) 105 img.file([$dirName, w.get("@#{x},#{y}")].join(File::Separator)) 106end 107 108