wxWidgets Discussion Forum

'cause it could have been a nice "one-liner" to have a screenshot in a wxImage (this is important 'cause access to the wxImages pixels using a pointer to GetData() is so much faster than accessing the wxBitmap pixels using wxNativePixelData).

This is an excerpt of code: the idea is to capture a portion of the screen. const wxPoint wxpZero(0,0); // handy 0,0 point wxScreenDC dcScreen; // Screen DC wxRect rCapture(0,0,200,200); // Area i want to capture // Working "canon" screencapture method wxBitmap bCapture(rCapture.GetSize(),24); wxMem...

wxWidgets 3.1.3, Windows 7 64. I'm rewriting an old, little C++Builder2006 program with wxWidgets and gcc. It requires a FileOpen dialog, and i've choose to use a wxFilePickerCtrl. My problem is that it is really slow: it tooks almost 2s to open the dialog window, 1s to "fill it up" (it is just whit...

I need to migrate a project from CodeBlocks to Codelite. In C:B it compiles (almost * ) flawlessy, while in CL it generates a lot of undefined references. I see how the problem arises here a lot, and i'm so sorry to ask about them again, but i really tried to get what's the difference between the tw...

Wonderful.
I'm amazed about how much my searching skills are low!

Thanks a lot.

As per title: there's a (fast) way to cast or copy between RECT and wxRect, or do i need to set each vertex by hand?

The bottleneck was storing all the pixel coordinates but you do not even have to do that, you only need to track their minimal and maximal coordinates, right? More or less. I may want to try to "recon" the caret shape and color to "filter out" other changes. The whole project is still to be defined...

Guys, i'm learning so much from this, thanks. About saving the coords: My experiment is to try to catch (by just using screeshots) where the caret is or where the user is typing: so right now the storing is abandoned when the Xs or the Ys "distance" exceed a limit, as it means that the screen is "ch...

which are more or less consistent with yours. Not really ;) PB's slowest version is the fastest on your system. Quite interesting actually. yeah. What i mean was that, being the blitting not an option (as i don't know which pixels are not black), the pixeldata iterator was the slow one, compared to...

Many thanks for your test program. I have lots to learn from it :) My results on my (pretty old) developing machine are these: testspeed.png which are more or less consistent with yours. (this is a wxWidgets 3.1.3 debug build) Now, i can't use the BitBlt function (as i need to check the result of ea...

MS Windows: I need to XOR the pixels of two images, writing (drawing) the result on a third one (but here i could add more pixel manipulation in the future), and save the x,y coords of the pixels which are != 0 (0,0,0). What's the fastest way to access the wxBitmap pixels? Is the sample code in the ...

I want to make a control that works with PNGs but looks like the wxAnimation (same exposed functions, so i can replace it with mine); so basically the animation is a single long PNG "strip" of frames, and the control show a portion of it as a "frame". What should be the best approach? Should i start...

My app UI is "assembled" using wxCrafter, either as a standalone program on Windows or as plugin in Debian, then i develop and compile using Code::Blocks and g++. wxCrafter creates a cpp files containing all the bitmaps (icons and images) i put in the controls with it, but does'nt do that with the G...

Mhm, this looks quite odd to me from the user view point. Anyway, did you try in the page changing event handler just vetoing the change and then calling wxNotebook::ChangeSelection() with CallAfter()? I'm a bit lost, as it seems i'm not able to write a CallAfter() call which compiles. CallAfter( [...

I need to "intercept" a page change and "redirect" it to another page (as example, it is changing to page 1 and i want it to land on page 9). The Page Changing event seemed the right place to do it by using the event->SetSelection, but the wxBookCtrlBase::DoSetSelection ignores the values of the eve...