Can GDI and RichEdit share the WindowClient (and live together)
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Hi I have a CrichEditctrl which I am using to display code (as in debugger). When the User whishes to place a breakpoint I TransparentBlt a red bitmap to the left In order to give GDI it own space DeflateRect the Richedit Rect (for the text ) to the left and RcihEdit::SetRect the new smaller size for richedit, Placing the bitmap everything looks fine However when my code reaches to where the breakpoint was set I highlite the line of code with SetSel and SetSelectionCharFormat this has the effect of wiping out the top of the red bullet bitmap which I dont understand Since the SetRect should ensure that it doesnt go out of the rect bounds. I know rich edit has an OLE interface (which can display bitmaps) however with that too I had problem as the bullet shifted the text Thanks
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Hi I have a CrichEditctrl which I am using to display code (as in debugger). When the User whishes to place a breakpoint I TransparentBlt a red bitmap to the left In order to give GDI it own space DeflateRect the Richedit Rect (for the text ) to the left and RcihEdit::SetRect the new smaller size for richedit, Placing the bitmap everything looks fine However when my code reaches to where the breakpoint was set I highlite the line of code with SetSel and SetSelectionCharFormat this has the effect of wiping out the top of the red bullet bitmap which I dont understand Since the SetRect should ensure that it doesnt go out of the rect bounds. I know rich edit has an OLE interface (which can display bitmaps) however with that too I had problem as the bullet shifted the text Thanks
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Hi I have a CrichEditctrl which I am using to display code (as in debugger). When the User whishes to place a breakpoint I TransparentBlt a red bitmap to the left In order to give GDI it own space DeflateRect the Richedit Rect (for the text ) to the left and RcihEdit::SetRect the new smaller size for richedit, Placing the bitmap everything looks fine However when my code reaches to where the breakpoint was set I highlite the line of code with SetSel and SetSelectionCharFormat this has the effect of wiping out the top of the red bullet bitmap which I dont understand Since the SetRect should ensure that it doesnt go out of the rect bounds. I know rich edit has an OLE interface (which can display bitmaps) however with that too I had problem as the bullet shifted the text Thanks
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Sorry about that, it was not appropriate to the specifics of your question. I cannot remember if you are using MFC or not. If you are then perhaps create your own class that inherits from the RichEdit class. If not then you could use the SubClassWindow function to get control of Windows WM_xxx messages and so modify what gets displayed.
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Sorry about that, it was not appropriate to the specifics of your question. I cannot remember if you are using MFC or not. If you are then perhaps create your own class that inherits from the RichEdit class. If not then you could use the SubClassWindow function to get control of Windows WM_xxx messages and so modify what gets displayed.
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Hi I have a CrichEditctrl which I am using to display code (as in debugger). When the User whishes to place a breakpoint I TransparentBlt a red bitmap to the left In order to give GDI it own space DeflateRect the Richedit Rect (for the text ) to the left and RcihEdit::SetRect the new smaller size for richedit, Placing the bitmap everything looks fine However when my code reaches to where the breakpoint was set I highlite the line of code with SetSel and SetSelectionCharFormat this has the effect of wiping out the top of the red bullet bitmap which I dont understand Since the SetRect should ensure that it doesnt go out of the rect bounds. I know rich edit has an OLE interface (which can display bitmaps) however with that too I had problem as the bullet shifted the text Thanks
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Hi I have a CrichEditctrl which I am using to display code (as in debugger). When the User whishes to place a breakpoint I TransparentBlt a red bitmap to the left In order to give GDI it own space DeflateRect the Richedit Rect (for the text ) to the left and RcihEdit::SetRect the new smaller size for richedit, Placing the bitmap everything looks fine However when my code reaches to where the breakpoint was set I highlite the line of code with SetSel and SetSelectionCharFormat this has the effect of wiping out the top of the red bullet bitmap which I dont understand Since the SetRect should ensure that it doesnt go out of the rect bounds. I know rich edit has an OLE interface (which can display bitmaps) however with that too I had problem as the bullet shifted the text Thanks
Have a look at the Scintilla library[^]. Last time I used it was nearly 20 years ago. I'm not even sure if Scintilla supports Windows anymore, you might need to do some research. I do see that they mention requiring a C++17 compiler on the website. Some old Codeproject articles about it: Using Scintilla for syntax coloring in MFC[^] CUltraPadWnd - A Simple Syntax Coloring Control Based on the MFC CWnd Class[^]
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I am using MFC wondering if by that you mean WM_PAINT or in my case the OnPaint message handler to ensure bitmap is intact
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I cannot suggest anything more without spending hours analysing your code. Which is not an option, sorry.
I understand I am going to try one more thing all this time I have been using DDX to create the window handle to the richedit. and using the control id it would pick the rect value from the resource file This in a way doesnt make sense. I am going to do a GetClientRect for the parent dialog deflat the recct on the left side then instantiate the Richedit with new and Call the Richedit Create to Create the the richedit with smaller rect
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Have a look at the Scintilla library[^]. Last time I used it was nearly 20 years ago. I'm not even sure if Scintilla supports Windows anymore, you might need to do some research. I do see that they mention requiring a C++17 compiler on the website. Some old Codeproject articles about it: Using Scintilla for syntax coloring in MFC[^] CUltraPadWnd - A Simple Syntax Coloring Control Based on the MFC CWnd Class[^]