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<pre><span style="color: rgb(128, 128, 128);"><i>#!/usr/bin/python</i></span>
<span style="color: rgb(128, 128, 128);"><i># In this program I wanted to write the event <B1-Motion> on my own, combining <Button-1>, <Motion> and <ButtonRelease-1>,
# but unfortunetly it doesn't work. No syntax errors.
</i></span> <span style="color: rgb(255, 0, 255);">from</span> Tkinter <span
style="color: rgb(255, 0, 255);">import</span> <span
style="color: rgb(255, 0, 255);">*</span>
<b>def</b> handler<span style="color: rgb(255, 0, 255);">(</span>event<span
style="color: rgb(255, 0, 255);">):</span>
<b>if</b> buttonpressed <span
style="color: rgb(255, 0, 255);">==</span> <span
style="color: rgb(0, 0, 255);">1</span> <span
style="color: rgb(255, 0, 255);">:</span>
<span
style="color: rgb(128, 128, 128);"><i>#if the mousebutton is pressed and moved, circles should appear, but they do not</i></span>
can.create_oval<span
style="color: rgb(255, 0, 255);">(</span>event.x<span
style="color: rgb(255, 0, 255);">-</span>r, event.y<span
style="color: rgb(255, 0, 255);">-</span>r, event.x<span
style="color: rgb(255, 0, 255);">+</span>r, event.y<span
style="color: rgb(255, 0, 255);">+</span>r, fill<span
style="color: rgb(255, 0, 255);">=</span><span
style="color: rgb(221, 0, 0);">"orange"</span><span
style="color: rgb(255, 0, 255);">)</span>
lab.config<span
style="color: rgb(255, 0, 255);">(</span>text<span
style="color: rgb(255, 0, 255);">=</span><span
style="color: rgb(221, 0, 0);">'buttonpressed='</span> <span
style="color: rgb(255, 0, 255);">+</span> <span
style="color: rgb(128, 0, 0);">str</span><span
style="color: rgb(255, 0, 255);">(</span>buttonpressed<span
style="color: rgb(255, 0, 255);">)</span> <span
style="color: rgb(255, 0, 255);">)</span>
<b>def</b> press<span style="color: rgb(255, 0, 255);">(</span>event<span
style="color: rgb(255, 0, 255);">):</span>
buttonpressed<span
style="color: rgb(255, 0, 255);">=</span><span
style="color: rgb(0, 0, 255);">1</span>
lab2.config<span
style="color: rgb(255, 0, 255);">(</span>text<span
style="color: rgb(255, 0, 255);">=</span>buttonpressed<span
style="color: rgb(255, 0, 255);">)</span>
<b>def</b> release<span style="color: rgb(255, 0, 255);">(</span>event<span
style="color: rgb(255, 0, 255);">):</span>
buttonpressed<span
style="color: rgb(255, 0, 255);">=</span><span
style="color: rgb(0, 0, 255);">0</span>
lab2.config<span
style="color: rgb(255, 0, 255);">(</span>text<span
style="color: rgb(255, 0, 255);">=</span>buttonpressed<span
style="color: rgb(255, 0, 255);">)</span>
r<span
style="color: rgb(255, 0, 255);">=</span><span
style="color: rgb(0, 0, 255);">5</span>
<span style="color: rgb(128, 128, 128);"><i>#global buttonpressed</i></span>
buttonpressed<span
style="color: rgb(255, 0, 255);">=</span><span
style="color: rgb(0, 0, 255);">0</span>
root <span
style="color: rgb(255, 0, 255);">=</span> Tk<span
style="color: rgb(255, 0, 255);">()</span>
root.geometry<span
style="color: rgb(255, 0, 255);">(</span><span
style="color: rgb(221, 0, 0);">'600x500+200+200'</span><span
style="color: rgb(255, 0, 255);">)</span>
<span style="color: rgb(128, 128, 128);"><i># both labels are used to check the status of the variable buttonpressed</i></span>
lab <span
style="color: rgb(255, 0, 255);">=</span> Label<span
style="color: rgb(255, 0, 255);">(</span>root, text<span
style="color: rgb(255, 0, 255);">=</span><span
style="color: rgb(221, 0, 0);">'cucc'</span><span
style="color: rgb(255, 0, 255);">)</span>
lab2 <span
style="color: rgb(255, 0, 255);">=</span> Label<span
style="color: rgb(255, 0, 255);">(</span>root, text<span
style="color: rgb(255, 0, 255);">=</span><span
style="color: rgb(221, 0, 0);">'cucc2'</span><span
style="color: rgb(255, 0, 255);">)</span>
can <span
style="color: rgb(255, 0, 255);">=</span> Canvas<span
style="color: rgb(255, 0, 255);">(</span>root, width<span
style="color: rgb(255, 0, 255);">=</span><span
style="color: rgb(221, 0, 0);">'500'</span>, height<span
style="color: rgb(255, 0, 255);">=</span><span
style="color: rgb(221, 0, 0);">'400'</span>, bg<span
style="color: rgb(255, 0, 255);">=</span><span
style="color: rgb(221, 0, 0);">'white'</span><span
style="color: rgb(255, 0, 255);">)</span>
can.bind<span
style="color: rgb(255, 0, 255);">(</span><span
style="color: rgb(221, 0, 0);">"<Motion>"</span>,handler<span
style="color: rgb(255, 0, 255);">)</span>
can.bind<span
style="color: rgb(255, 0, 255);">(</span><span
style="color: rgb(221, 0, 0);">"<Button-1>"</span>,press<span
style="color: rgb(255, 0, 255);">)</span>
can.bind<span
style="color: rgb(255, 0, 255);">(</span><span
style="color: rgb(221, 0, 0);">"<ButtonRelease-1>"</span>,release<span
style="color: rgb(255, 0, 255);">)</span>
lab.pack<span
style="color: rgb(255, 0, 255);">()</span>
lab2.pack<span
style="color: rgb(255, 0, 255);">()</span>
can.pack<span
style="color: rgb(255, 0, 255);">()</span>
root.mainloop<span
style="color: rgb(255, 0, 255);">()</span>
</pre>
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