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POIssues with Python Tkinter: Frames within a Canvas
 

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  1. POIssues with Python Tkinter: Frames within a Canvas
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    <p>I'm trying to set up a scrollable series of Frames, so I've nested them into a Canvas. Below, I've included some sample code that demonstrates the problem.</p> <p>However, I have three issues:</p> <ol> <li>Frame <code>c</code> doesn't seem to expand horizontally to fill the canvas.</li> <li>If I use multiple frames <code>c</code>, the canvas scrolls, but if I try to nest my <code>FrameRow</code>s into a single frame <code>c</code>, the canvas no longer scrolls.</li> <li>With multiple frames <code>c</code>, the last of the <code>FrameRow</code>s is cut off.</li> </ol> <p>Buttons "Left" and "Right" demonstrate the behavior I get when the buttons are not nested in a Canvas.</p> <p>I'd prefer using the single Frame <code>c</code> and nesting all <code>FrameRows</code> in that, but I would need the scrolling to work properly for that.</p> <pre><code>import * from Tkinter import FrameRow root = Tk() root.title("Testing") containerFrame = Frame(root) containerFrame.config(bg="red") containerFrame.pack(side=TOP, fill=BOTH, expand=1) # Frame showing proper behavior a = Frame(containerFrame, bg="black") a.pack(side=TOP, fill=X, expand=0) btnLeft = Button(a) btnLeft.config(text="LEFT") btnLeft.pack(side=LEFT, fill=X, expand=1) btnRight = Button(a) btnRight.config(text="RIGHT") btnRight.pack(side=RIGHT, fill=X, expand=0) # Canvas canvas = Canvas(containerFrame) scrollbar = Scrollbar(containerFrame, orient=VERTICAL) scrollbar.config(command=canvas.yview) canvas.config(bg="blue", yscrollcommand=scrollbar.set) scrollbar.pack(side=RIGHT, fill=Y) canvas.pack(side=LEFT, fill=BOTH, expand=1) # Multiple Frames within Canvas frameRow = range(30) c = range(30) for r in xrange(0,30): c[r] = Frame(canvas) c[r].config(bg="green") frameRow[r] = FrameRow.FrameRow() frameRow[r].setFrame(c[r]) frameRow[r].setRow(r) frameRow[r].createRow() c[r].pack(side=TOP, fill=X, expand=1) canvas.create_window(0, (r+1)*30, window=c[r], anchor="nw") canvas.config(scrollregion = canvas.bbox(ALL)) # OR # Single Frame within Canvas ##c = Frame(canvas) ##c.config(bg="green") ## ##frameRow = range(30) ##for r in xrange(0,30): ## frameRow[r] = FrameRow.FrameRow() ## frameRow[r].setFrame(c) ## frameRow[r].setRow(r) ## frameRow[r].createRow() ## ##c.pack(side=TOP, fill=X, expand=1) ##canvas.create_window(0, 0, window=c, anchor="nw") root.mainloop() </code></pre> <p>The <code>FrameRow</code> class is defined as:</p> <pre><code>from Tkinter import * class FrameRow(): _frame = "Default" _row = 0 def setFrame(self, frame): self._frame = frame def setRow(self, row): self._row = row def createRow(self): self.frameRow = Frame(self._frame) self.frameRow.config(bg="yellow") self.frameRow.pack(side=TOP, fill=X, expand=1) self.btn1 = Button(self.frameRow) self.btn1.config(text="Button "+str(self._row)+"A") self.btn1.pack(side=LEFT, fill=X, expand=1) self.btn2 = Button(self.frameRow) self.btn2.config(text="Button "+str(self._row)+"B") self.btn2.pack(side=RIGHT, anchor=E, fill=X, expand=0) </code></pre> <p>Is there something I'm missing in getting Frame(s) <code>c</code> to expand to the width of the canvas?</p> <p>Am I doing something wrong with the scrolling and the single Frame <code>c</code>?</p> <p>Are there any decent tutorials or examples that show how I should be doing this?</p> <p>Thanks!</p>
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