292 lines
9.7 KiB
Ruby
292 lines
9.7 KiB
Ruby
# twind.rb
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#
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# This demonstration script creates a text widget with a bunch of
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# embedded windows.
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#
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# text (embedded windows) widget demo (called by 'widget')
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#
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# toplevel widget
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if defined?($twind_demo) && $twind_demo
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$twind_demo.destroy
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$twind_demo = nil
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end
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# demo toplevel widget
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$twind_demo = TkToplevel.new {|w|
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title("Text Demonstration - Embedded Windows")
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iconname("Embedded Windows")
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positionWindow(w)
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}
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base_frame = TkFrame.new($twind_demo).pack(:fill=>:both, :expand=>true)
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# frame
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$twind_buttons = TkFrame.new(base_frame) {|frame|
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TkButton.new(frame) {
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text 'Dismiss'
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command proc{
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tmppath = $twind_demo
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$twind_demo = nil
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tmppath.destroy
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}
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}.pack('side'=>'left', 'expand'=>'yes')
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TkButton.new(frame) {
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text 'Show Code'
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command proc{showCode 'twind'}
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}.pack('side'=>'left', 'expand'=>'yes')
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}
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$twind_buttons.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>'2m')
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# frame
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$twind_text = nil
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TkFrame.new(base_frame, 'highlightthickness'=>2, 'borderwidth'=>2,
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'relief'=>'sunken') {|f|
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$twind_text = TkText.new(f, 'setgrid'=>'true', 'font'=>$font,
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'width'=>'70', 'height'=>35, 'wrap'=>'word',
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'highlightthickness'=>0, 'borderwidth'=>0 ){|t|
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TkScrollbar.new(f) {|s|
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command proc{|*args| t.yview(*args)}
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t.yscrollcommand proc{|first,last| s.set first,last}
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}.pack('side'=>'right', 'fill'=>'y')
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}.pack('expand'=>'yes', 'fill'=>'both')
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}.pack('expand'=>'yes', 'fill'=>'both')
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#
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$tag_center = TkTextTag.new($twind_text,
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'justify' =>'center',
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'spacing1'=>'5m',
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'spacing3'=>'5m' )
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$tag_buttons = TkTextTag.new($twind_text,
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'lmargin1'=>'1c',
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'lmargin2'=>'1c',
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'rmargin' =>'1c',
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'spacing1'=>'3m',
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'spacing2'=>0,
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'spacing3'=>0 )
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$twind_text.insert('end', "A text widget can contain other widgets embedded ")
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$twind_text.insert('end', "it. These are called \"embedded windows\", ")
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$twind_text.insert('end', "and they can consist of arbitrary widgets. ")
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$twind_text.insert('end', "For example, here are two embedded button ")
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$twind_text.insert('end', "widgets. You can click on the first button to ")
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TkTextWindow.new($twind_text, 'end',
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'window'=>TkButton.new($twind_text) {
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#text 'ON'
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text 'Turn On'
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command proc{textWindOn $twind_text,$twind_buttons}
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cursor 'top_left_arrow'
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})
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$twind_text.insert('end', " horizontal scrolling, which also turns off ")
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$twind_text.insert('end', "word wrapping. Or, you can click on the second ")
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$twind_text.insert('end', "button to\n")
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TkTextWindow.new($twind_text, 'end',
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'window'=>TkButton.new($twind_text) {
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#text 'OFF'
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text 'Turn Off'
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command proc{textWindOff $twind_text}
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cursor 'top_left_arrow'
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})
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$twind_text.insert('end', " horizontal scrolling and turn back on word wrapping.\n\n")
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$twind_text.insert('end', "Or, here is another example. If you ")
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TkTextWindow.new($twind_text, 'end',
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'window'=>TkButton.new($twind_text) {
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text 'Click Here'
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command proc{textWindPlot $twind_text}
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cursor 'top_left_arrow'
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})
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$twind_text.insert('end', " a canvas displaying an x-y plot will appear right here.")
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$mark_plot = TkTextMark.new($twind_text, 'insert')
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$mark_plot.gravity='left'
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$twind_text.insert('end', " You can drag the data points around with the mouse, ")
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$twind_text.insert('end', "or you can click here to ")
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TkTextWindow.new($twind_text, 'end',
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'window'=>TkButton.new($twind_text) {
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text 'Delete'
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command proc{textWindDel $twind_text}
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cursor 'top_left_arrow'
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})
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$twind_text.insert('end', " the plot again.\n\n")
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$twind_text.insert('end', "You may also find it useful to put embedded windows in ")
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$twind_text.insert('end', "a text without any actual text. In this case the ")
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$twind_text.insert('end', "text widget acts like a geometry manager. For ")
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$twind_text.insert('end', "example, here is a collection of buttons laid out ")
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$twind_text.insert('end', "neatly into rows by the text widget. These buttons ")
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$twind_text.insert('end', "can be used to change the background color of the ")
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$twind_text.insert('end', "text widget (\"Default\" restores the color to ")
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$twind_text.insert('end', "its default). If you click on the button labeled ")
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$twind_text.insert('end', "\"Short\", it changes to a longer string so that ")
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$twind_text.insert('end', "you can see how the text widget automatically ")
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$twind_text.insert('end', "changes the layout. Click on the button again ")
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$twind_text.insert('end', "to restore the short string.\n")
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TkTextWindow.new($twind_text, 'end',
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'window'=>TkButton.new($twind_text) {|b|
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text 'Default'
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command proc{embDefBg $twind_text}
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cursor 'top_left_arrow'
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$tag_buttons.add('end')
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},
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'padx'=>3 )
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embToggle = TkVariable.new('Short')
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TkTextWindow.new($twind_text, 'end',
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'window'=>TkCheckButton.new($twind_text) {
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textvariable embToggle
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indicatoron 0
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variable embToggle
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onvalue 'A much longer string'
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offvalue 'Short'
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cursor 'top_left_arrow'
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pady 5
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padx 2
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},
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'padx'=>3,
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'pady'=>2 )
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[ 'AntiqueWhite3', 'Bisque1', 'Bisque2', 'Bisque3', 'Bisque4',
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'SlateBlue3', 'RoyalBlue1', 'SteelBlue2', 'DeepSkyBlue3', 'LightBlue1',
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'DarkSlateGray1', 'Aquamarine2', 'DarkSeaGreen2', 'SeaGreen1',
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'Yellow1', 'IndianRed1', 'IndianRed2', 'Tan1', 'Tan4'
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].each{|twind_color|
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TkTextWindow.new($twind_text, 'end',
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'window'=>TkButton.new($twind_text) {
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text twind_color
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cursor 'top_left_arrow'
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command proc{$twind_text.bg twind_color}
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},
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'padx'=>3,
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'pady'=>2 )
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}
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#
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def textWindOn (w,f)
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if defined? $twind_scroll
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begin
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$twind_scroll.destroy
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rescue
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end
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$twind_scroll = nil
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end
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base = TkWinfo.parent( TkWinfo.parent(w) )
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$twind_scroll = TkScrollbar.new(base) {|s|
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orient 'horizontal'
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command proc{|*args| w.xview(*args)}
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w.xscrollcommand proc{|first,last| s.set first,last}
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w.wrap 'none'
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pack('after'=>f, 'side'=>'bottom', 'fill'=>'x')
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}
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return nil
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end
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def textWindOff (w)
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if defined? $twind_scroll
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begin
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$twind_scroll.destroy
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rescue
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end
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$twind_scroll = nil
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end
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w.xscrollcommand ''
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w.wrap 'word'
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end
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def textWindPlot (t)
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if (defined? $twind_plot) && TkWinfo.exist?($twind_plot)
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return
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end
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$twind_plot = TkCanvas.new(t) {
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relief 'sunken'
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width 450
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height 300
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cursor 'top_left_arrow'
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}
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if $tk_version =~ /^4.*/
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font = '-Adobe-Helvetica-Medium-R-Normal--*-180-*-*-*-*-*-*'
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else
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font = 'Helvetica 18'
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end
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TkcLine.new($twind_plot, 100, 250, 400, 250, 'width'=>2)
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TkcLine.new($twind_plot, 100, 250, 100, 50, 'width'=>2)
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TkcText.new($twind_plot, 225, 20,
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'text'=>"A Simple Plot", 'font'=>font, 'fill'=>'brown')
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(0..10).each {|i|
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x = 100 + (i * 30)
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TkcLine.new($twind_plot, x, 250, x, 245, 'width'=>2)
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TkcText.new($twind_plot, x, 254,
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'text'=>10*i, 'font'=>font, 'anchor'=>'n')
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}
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(0..5).each {|i|
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y = 250 - (i * 40)
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TkcLine.new($twind_plot, 100, y, 105, y, 'width'=>2)
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TkcText.new($twind_plot, 96, y,
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'text'=>"#{i*50}.0", 'font'=>font, 'anchor'=>'e')
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}
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for xx, yy in [[12,56],[20,94],[33,98],[32,120],[61,180],[75,160],[98,223]]
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x = 100 + (3*xx)
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y = 250 - (4*yy)/5
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item = TkcOval.new($twind_plot, x-6, y-6, x+6, y+6,
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'width'=>1, 'outline'=>'black', 'fill'=>'SkyBlue2')
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item.addtag 'point'
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end
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$twind_plot.itembind('point', 'Any-Enter',
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proc{$twind_plot.itemconfigure 'current', 'fill', 'red'})
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$twind_plot.itembind('point', 'Any-Leave',
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proc{$twind_plot.itemconfigure 'current', 'fill', 'SkyBlue2'})
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$twind_plot.itembind('point', '1',
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proc{|x,y| embPlotDown $twind_plot,x,y}, "%x %y")
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$twind_plot.itembind('point', 'ButtonRelease-1',
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proc{$twind_plot.dtag 'selected'})
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$twind_plot.bind('B1-Motion',
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proc{|x,y| embPlotMove $twind_plot,x,y}, "%x %y")
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while ($twind_text.get($mark_plot) =~ /[ \t\n]/)
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$twind_text.delete $mark_plot
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end
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$twind_text.insert $mark_plot,"\n"
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TkTextWindow.new($twind_text, $mark_plot, 'window'=>$twind_plot)
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$tag_center.add $mark_plot
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$twind_text.insert $mark_plot,"\n"
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end
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$embPlot = {'lastX'=>0, 'lastY'=>0}
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def embPlotDown (w, x, y)
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w.dtag 'selected'
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w.addtag_withtag 'selected', 'current'
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w.raise 'current'
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$embPlot['lastX'] = x
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$embPlot['lastY'] = y
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end
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def embPlotMove (w, x, y)
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w.move 'selected', x - $embPlot['lastX'], y - $embPlot['lastY']
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$embPlot['lastX'] = x
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$embPlot['lastY'] = y
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end
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def textWindDel (w)
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if (defined? $twind_text) && TkWinfo.exist?($twind_plot)
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$twind_text.delete $twind_plot
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$twind_plot = nil
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while ($twind_text.get($mark_plot) =~ /[ \t\n]/)
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$twind_text.delete $mark_plot
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end
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$twind_text.insert $mark_plot," "
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end
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end
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def embDefBg (w)
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w['background'] = w.configinfo('background')[3]
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end
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