| | 1 | |
| | 2 | from wxPython.wx import * |
| | 3 | from wxPython.html import * |
| | 4 | |
| | 5 | #---------------------------------------------------------------------- |
| | 6 | |
| | 7 | BTN1 = wxNewId() |
| | 8 | BTN2 = wxNewId() |
| | 9 | |
| | 10 | |
| | 11 | class TestPanel(wxPanel): |
| | 12 | def __init__(self, parent, log): |
| | 13 | wxPanel.__init__(self, parent, -1) |
| | 14 | self.log = log |
| | 15 | |
| | 16 | sizer = wxBoxSizer(wxVERTICAL) |
| | 17 | html = wxHtmlWindow(self, -1) |
| | 18 | html.SetPage(overview) |
| | 19 | sizer.Add(html, 1, wxEXPAND|wxALL, 5) |
| | 20 | |
| | 21 | btns = wxBoxSizer(wxHORIZONTAL) |
| | 22 | btns.Add(50, -1, 1, wxEXPAND) |
| | 23 | btn1 = wxButton(self, BTN1, "Find My Alter-ego") # don't save a ref to this one |
| | 24 | btns.Add(btn1) |
| | 25 | btns.Add(50, -1, 1, wxEXPAND) |
| | 26 | self.btn2 = wxButton(self, BTN2, "Find Myself") |
| | 27 | btns.Add(self.btn2) |
| | 28 | btns.Add(50, -1, 1, wxEXPAND) |
| | 29 | |
| | 30 | sizer.Add(btns, 0, wxEXPAND|wxALL, 15) |
| | 31 | |
| | 32 | self.SetSizer(sizer) |
| | 33 | self.SetAutoLayout(true) |
| | 34 | |
| | 35 | self.sizer = sizer # save it for testing later |
| | 36 | |
| | 37 | EVT_BUTTON(self, BTN1, self.OnFindButton1) |
| | 38 | EVT_BUTTON(self, BTN2, self.OnFindButton2) |
| | 39 | |
| | 40 | |
| | 41 | def OnFindButton1(self, evt): |
| | 42 | win = self.FindWindowById(BTN1) |
| | 43 | if win is None: |
| | 44 | self.log.write("***** OOPS! None returned...\n") |
| | 45 | return |
| | 46 | className = win.__class__.__name__ |
| | 47 | if className in ["wxButton", "wxButtonPtr"]: |
| | 48 | self.log.write("The types are the same! <grin>\n") |
| | 49 | else: |
| | 50 | self.log.write("Got %s, expected wxButton or wxButtonPtr\n" % className) |
| | 51 | |
| | 52 | |
| | 53 | |
| | 54 | def OnFindButton2(self, evt): |
| | 55 | win = self.FindWindowById(BTN2) |
| | 56 | if win is None: |
| | 57 | self.log.write("***** OOPS! None returned...\n") |
| | 58 | return |
| | 59 | if win is self.btn2: |
| | 60 | self.log.write("The objects are the same! <grin>\n") |
| | 61 | else: |
| | 62 | self.log.write("The objects are NOT the same! <frown>\n") |
| | 63 | |
| | 64 | win = evt.GetEventObject() |
| | 65 | if win is None: |
| | 66 | self.log.write("***** OOPS! None returned...\n") |
| | 67 | return |
| | 68 | if win is self.btn2: |
| | 69 | self.log.write("The objects are the same! <grin>\n") |
| | 70 | else: |
| | 71 | self.log.write("The objects are NOT the same! <frown>\n") |
| | 72 | |
| | 73 | sizer = self.GetSizer() |
| | 74 | if sizer is None: |
| | 75 | self.log.write("***** OOPS! None returned...\n") |
| | 76 | return |
| | 77 | if sizer is self.sizer: |
| | 78 | self.log.write("The objects are the same! <grin>\n") |
| | 79 | else: |
| | 80 | self.log.write("The objects are NOT the same! <frown>\n") |
| | 81 | |
| | 82 | |
| | 83 | #---------------------------------------------------------------------- |
| | 84 | |
| | 85 | def runTest(frame, nb, log): |
| | 86 | win = TestPanel(nb, log) |
| | 87 | return win |
| | 88 | |
| | 89 | #---------------------------------------------------------------------- |
| | 90 | |
| | 91 | |
| | 92 | overview = """\ |
| | 93 | <html><body> |
| | 94 | <h2>Original Object Return</h2> |
| | 95 | |
| | 96 | <p>Several methods in wxWindows return pointers to base class objects, |
| | 97 | when in fact the actual object pointed to is of a derived type. Since |
| | 98 | SWIG isn't able to tell the actual type it just creates a new Python |
| | 99 | shadow object of the base type to wrap around the base type pointer |
| | 100 | and returns it. |
| | 101 | |
| | 102 | <p>In wxPython prior to 2.3.0 this could cause annoying issues. For |
| | 103 | example if you called: |
| | 104 | |
| | 105 | <pre> |
| | 106 | |
| | 107 | myText = someWindow.FindWindowById(txtID) |
| | 108 | </pre> |
| | 109 | |
| | 110 | expecting to get a wxTextCtrl you would actually get a wxWindow object |
| | 111 | instead. If you then try to call SetValue on that object you'll get |
| | 112 | an exception since there is no such method. This is the reason for |
| | 113 | the wxPyTypeCast hack that has been in wxPython for so long. |
| | 114 | |
| | 115 | <p>Even with wxPyTypeCast there was the issue that the object returned |
| | 116 | was not the same one that was created in Python originally, but a new |
| | 117 | object of the same type that wraps the same C++ pointer. If the |
| | 118 | programmer has set additional attributes of that original object they |
| | 119 | will not exist in the new object. |
| | 120 | |
| | 121 | <p>For a long time now I have wanted to do away with wxPyTypeCast and |
| | 122 | also find a way to return the original Python object from methods like |
| | 123 | FindWindowById. This project naturally divides into two phases: |
| | 124 | |
| | 125 | <p><ol> |
| | 126 | |
| | 127 | <li>Teach the wrapper methods how to return objects of the right type, |
| | 128 | and be able to then turn wxPyTypeCast in to a no-op. |
| | 129 | |
| | 130 | <li>Be able to return the original Python shadow object if it still exists. |
| | 131 | |
| | 132 | </ol> |
| | 133 | |
| | 134 | <p>The first button below shows the first of these phases (<i>working</i>) |
| | 135 | and the second will show #2 (<i>working as of 2.3.2</i>) |
| | 136 | |
| | 137 | </body></html> |
| | 138 | """ |
projects / wxWidgets.git / blame_incremental