[PyQt] Custom Widget

[Hans-Peter Jansen]

On Wednesday 26 January 2011, 14:35:35 ferdemza at gmail.com wrote:
> Thanks again Pete
>
> I think i will do my own custom widget from scratch following a book
> i have and then use the link you gave me to integrate it to the
> designer.

As I told you, it is simpler to convert the Qt code.

@Phil: for some reason, the richTextPainter.end() is needed in the PyQt 
version to avoid a SIGSEGV crash during paint event:

QPaintDevice: Cannot destroy paint device that is being painted

(gdb) bt
#0  0x08339d10 in ?? ()
#1  0xb647c3f8 in ~QPainter (this=0x1) at painting/qpainter.cpp:1491
#2  0xb6fdfe80 in release_QPainter (sipCppV=0x82514d8) at sipQtGuiQPainter.cpp:5371
#3  0xb6fdfedc in dealloc_QPainter (sipSelf=0xb4ae4454) at sipQtGuiQPainter.cpp:5382
#4  0xb7fc4f5f in forgetObject (sw=0xb4ae4454) at siplib.c:10004
#5  0xb7fc4ff1 in sipSimpleWrapper_dealloc (self=0xb4ae4454) at siplib.c:9233
#6  0xb7eba68d in subtype_dealloc (self=0xb4ae4454) at Objects/typeobject.c:1018
#7  0xb7e8c24a in frame_dealloc (f=0x8301c4c) at Objects/frameobject.c:417
#8  0xb7ef8bec in PyEval_EvalCodeEx (co=0xb7c32260, globals=0xb7c7602c, locals=0x0, args=0xb7c42418, argcount=2, 
    kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:2953
#9  0xb7e8da29 in function_call (func=0xb5f37994, arg=0xb7c4240c, kw=0x0) at Objects/funcobject.c:524
#10 0xb7e68c1c in PyObject_Call (func=0xb5f37994, arg=0xb7c4240c, kw=0x0) at Objects/abstract.c:2487
#11 0xb7e769fe in instancemethod_call (func=0xb5f37994, arg=0xb7c4240c, kw=0x0) at Objects/classobject.c:2579
#12 0xb7e68c1c in PyObject_Call (func=0xb7c26694, arg=0xb5f5b02c, kw=0x0) at Objects/abstract.c:2487
#13 0xb7ef177f in PyEval_CallObjectWithKeywords (func=0xb7c26694, arg=0xb5f5b02c, kw=0x0) at Python/ceval.c:3548
#14 0xb7fc6b03 in sip_api_call_method (isErr=0x0, method=0xb7c26694, fmt=0xb721cf4c "D") at siplib.c:1721
#15 0xb6e3b5f9 in sipVH_QtGui_3 (sipGILState=PyGILState_UNLOCKED, sipMethod=0xb7c26694, a0=0xbfffdaa4)
    at sipQtGuicmodule.cpp:7343
#16 0xb7199dc9 in sipQPushButton::paintEvent (this=0x81f0718, a0=0xbfffdaa4) at sipQtGuiQPushButton.cpp:420

Do you want me to prepare that code for inclusion into examples? 

Pete
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