Issue #21597: Turtledemo text pane can now be widened to view or copy complete

lines or narrowed for small screens.
Issie #19132: Turtledemo buttons no longer disappear when window is shrun.
Patch mostly by Lita Cho (21597) using idea from patch by Jan Kanis (18132).

1 files changed, 80 insertions, 68 deletions

diff --git a/Lib/turtledemo/__main__.py b/Lib/turtledemo/__main__.py
index a14684c356..35b1651572 100755
--- a/Lib/turtledemo/__main__.py
+++ b/Lib/turtledemo/__main__.py
@@ -41,85 +41,95 @@ def showAboutTurtle():
 
 class DemoWindow(object):
 
-    def __init__(self, filename=None):   #, root=None):
+    def __init__(self, filename=None):
         self.root = root = turtle._root = Tk()
+        root.title('Python turtle-graphics examples')
         root.wm_protocol("WM_DELETE_WINDOW", self._destroy)
 
-        #################
-        self.mBar = Frame(root, relief=RAISED, borderwidth=2)
-        self.mBar.pack(fill=X)
+        root.grid_rowconfigure(1, weight=1)
+        root.grid_columnconfigure(0, weight=1)
+        root.grid_columnconfigure(1, minsize=90, weight=1)
+        root.grid_columnconfigure(2, minsize=90, weight=1)
+        root.grid_columnconfigure(3, minsize=90, weight=1)
 
+        self.mBar = Frame(root, relief=RAISED, borderwidth=2)
         self.ExamplesBtn = self.makeLoadDemoMenu()
         self.OptionsBtn = self.makeHelpMenu()
-        self.mBar.tk_menuBar(self.ExamplesBtn, self.OptionsBtn) #, QuitBtn)
+        self.mBar.tk_menuBar(self.ExamplesBtn, self.OptionsBtn)
+        self.mBar.grid(row=0, columnspan=4, sticky='news')
+
+        pane = PanedWindow(orient=HORIZONTAL, sashwidth=5,
+                           sashrelief=SOLID, bg='#ddd')
+        pane.add(self.makeTextFrame(pane))
+        pane.add(self.makeGraphFrame(pane))
+        pane.grid(row=1, columnspan=4, sticky='news')
+
+        self.output_lbl = Label(root, height= 1, text=" --- ", bg="#ddf",
+                                font=("Arial", 16, 'normal'), borderwidth=2,
+                                relief=RIDGE)
+        self.start_btn = Button(root, text=" START ", font=btnfont,
+                                fg="white", disabledforeground = "#fed",
+                                command=self.startDemo)
+        self.stop_btn = Button(root, text=" STOP ", font=btnfont,
+                               fg="white", disabledforeground = "#fed",
+                               command=self.stopIt)
+        self.clear_btn = Button(root, text=" CLEAR ", font=btnfont,
+                                fg="white", disabledforeground="#fed",
+                                command = self.clearCanvas)
+        self.output_lbl.grid(row=2, column=0, sticky='news', padx=(0,5))
+        self.start_btn.grid(row=2, column=1, sticky='ew')
+        self.stop_btn.grid(row=2, column=2, sticky='ew')
+        self.clear_btn.grid(row=2, column=3, sticky='ew')
+
+        Percolator(self.text).insertfilter(ColorDelegator())
+        self.dirty = False
+        self.exitflag = False
+        if filename:
+            self.loadfile(filename)
+        self.configGUI(NORMAL, DISABLED, DISABLED, DISABLED,
+                       "Choose example from menu", "black")
+        self.state = STARTUP
 
-        root.title('Python turtle-graphics examples')
-        #################
-        self.left_frame = left_frame = Frame(root)
-        self.text_frame = text_frame = Frame(left_frame)
-        self.vbar = vbar =Scrollbar(text_frame, name='vbar')
-        self.text = text = Text(text_frame,
-                                name='text', padx=5, wrap='none',
-                                width=45)
+
+    def onResize(self, event):
+        cwidth = self._canvas.winfo_width()
+        cheight = self._canvas.winfo_height()
+        self._canvas.xview_moveto(0.5*(self.canvwidth-cwidth)/self.canvwidth)
+        self._canvas.yview_moveto(0.5*(self.canvheight-cheight)/self.canvheight)
+
+    def makeTextFrame(self, root):
+        self.text_frame = text_frame = Frame(root)
+        self.text = text = Text(text_frame, name='text', padx=5,
+                                wrap='none', width=45)
+
+        self.vbar = vbar = Scrollbar(text_frame, name='vbar')
         vbar['command'] = text.yview
         vbar.pack(side=LEFT, fill=Y)
-        #####################
-        self.hbar = hbar =Scrollbar(text_frame, name='hbar', orient=HORIZONTAL)
+        self.hbar = hbar = Scrollbar(text_frame, name='hbar', orient=HORIZONTAL)
         hbar['command'] = text.xview
         hbar.pack(side=BOTTOM, fill=X)
-        #####################
+
+        text['font'] = txtfont
         text['yscrollcommand'] = vbar.set
-        text.config(font=txtfont)
-        text.config(xscrollcommand=hbar.set)
-        text.pack(side=LEFT, fill=Y, expand=1)
-        #####################
-        self.output_lbl = Label(left_frame, height= 1,text=" --- ", bg = "#ddf",
-                                font = ("Arial", 16, 'normal'))
-        self.output_lbl.pack(side=BOTTOM, expand=0, fill=X)
-        #####################
-        text_frame.pack(side=LEFT, fill=BOTH, expand=0)
-        left_frame.pack(side=LEFT, fill=BOTH, expand=0)
-        self.graph_frame = g_frame = Frame(root)
-
-        turtle._Screen._root = g_frame
-        turtle._Screen._canvas = turtle.ScrolledCanvas(g_frame, 800, 600, 1000, 800)
-        #xturtle.Screen._canvas.pack(expand=1, fill="both")
+        text['xscrollcommand'] = hbar.set
+        text.pack(side=LEFT, fill=BOTH, expand=1)
+        return text_frame
+
+    def makeGraphFrame(self, root):
+        turtle._Screen._root = root
+        self.canvwidth = 1000
+        self.canvheight = 800
+        turtle._Screen._canvas = self._canvas = canvas = turtle.ScrolledCanvas(
+                root, 800, 600, self.canvwidth, self.canvheight)
+        canvas.adjustScrolls()
+        canvas._rootwindow.bind('<Configure>', self.onResize)
+        canvas._canvas['borderwidth'] = 0
+
         self.screen = _s_ = turtle.Screen()
-#####
         turtle.TurtleScreen.__init__(_s_, _s_._canvas)
-#####
         self.scanvas = _s_._canvas
-        #xturtle.RawTurtle.canvases = [self.scanvas]
         turtle.RawTurtle.screens = [_s_]
-
-        self.scanvas.pack(side=TOP, fill=BOTH, expand=1)
-
-        self.btn_frame = btn_frame = Frame(g_frame, height=100)
-        self.start_btn = Button(btn_frame, text=" START ", font=btnfont, fg = "white",
-                                disabledforeground = "#fed", command=self.startDemo)
-        self.start_btn.pack(side=LEFT, fill=X, expand=1)
-        self.stop_btn = Button(btn_frame, text=" STOP ",  font=btnfont, fg = "white",
-                                disabledforeground = "#fed", command = self.stopIt)
-        self.stop_btn.pack(side=LEFT, fill=X, expand=1)
-        self.clear_btn = Button(btn_frame, text=" CLEAR ",  font=btnfont, fg = "white",
-                                disabledforeground = "#fed", command = self.clearCanvas)
-        self.clear_btn.pack(side=LEFT, fill=X, expand=1)
-
-        self.btn_frame.pack(side=TOP, fill=BOTH, expand=0)
-        self.graph_frame.pack(side=TOP, fill=BOTH, expand=1)
-
-        Percolator(text).insertfilter(ColorDelegator())
-        self.dirty = False
-        self.exitflag = False
-        if filename:
-            self.loadfile(filename)
-        self.configGUI(NORMAL, DISABLED, DISABLED, DISABLED,
-                       "Choose example from menu", "black")
-        self.state = STARTUP
-
-    def _destroy(self):
-        self.root.destroy()
-        sys.exit()
+        return canvas
 
     def configGUI(self, menu, start, stop, clear, txt="", color="blue"):
         self.ExamplesBtn.config(state=menu)
@@ -145,9 +155,9 @@ class DemoWindow(object):
 
         self.output_lbl.config(text=txt, fg=color)
 
-
     def makeLoadDemoMenu(self):
-        CmdBtn = Menubutton(self.mBar, text='Examples', underline=0, font=menufont)
+        CmdBtn = Menubutton(self.mBar, text='Examples',
+                            underline=0, font=menufont)
         CmdBtn.pack(side=LEFT, padx="2m")
         CmdBtn.menu = Menu(CmdBtn)
 
@@ -180,7 +190,6 @@ class DemoWindow(object):
     def refreshCanvas(self):
         if not self.dirty: return
         self.screen.clear()
-        #self.screen.mode("standard")
         self.dirty=False
 
     def loadfile(self, filename):
@@ -238,10 +247,13 @@ class DemoWindow(object):
             self.configGUI(NORMAL, NORMAL, DISABLED, DISABLED,
                            "STOPPED!", "red")
             turtle.TurtleScreen._RUNNING = False
-            #print "stopIT: exitflag = True"
         else:
             turtle.TurtleScreen._RUNNING = False
-            #print "stopIt: exitflag = False"
+
+    def _destroy(self):
+        self.root.destroy()
+        sys.exit()
+
 
 if __name__ == '__main__':
     demo = DemoWindow()