wxWidgets Discussion Forum

Hi I'm getting some sort of memory problem with the heap. I'm running a debug build of my software in the Visual Studio debugger and the following code sample wxString string="my string"; string.utf8_str(); causes a debug assertion fail, with an error message saying File: minkernel\crts\ucrt\src\app...

Hi I know there have been a number of Refresh related questions in the past, but I still don't seem able to fix my issue. I have a wxFrame which I add rows of text controls to. Between each row is a button to add a new row in that location, and at the end of each row are buttons to delete the row or...

Actually I was just rendering directly to the wxFrame. Perhaps this is the problem?

Hi
I'm trying to click and drag a rectangular selection area on a wxFrame, but I don't seem able to capture the mouse button release.

I have tried using EVT_MOUSE_EVENTS and EVT_LEFT_UP, but neither seem to capture the button release. How do I do this?

Phil

Hi I'm a developer for PLplot, a plotting library which used wxWidgets (among a number of other options) for its graphics backend. I'm trying to sort out the text rendering and scaling. When using the library the user passes in a wxDC* and PLplot will render on it. However, when dealing with multipl...

Hi I have just started using the new std::path class which is currently in experimental stage and my understanding is that it is expected to end up in C++17 (or C++1z or whatever it is called). I'm currently using it with VS2015 and it can be found in the filesystem header as std::tr2::sys::path. Th...

Thanks DenDev This seems to get me past the creation of the wxBitmap, however I still get a crash. I think this is now due to the creation of the wxMemoryDC. Valgring output below. It looks like this is actually in wxDC (i.e. the top level base class) and is related to wxFont. I am thinking that per...

Hi I am trying to set up a way to determine the size of a string, as it would be displayed on screen by a wxGCDC with a given wxFont, but from a console mode app. For wxMSW I can create a wxBitmap and from that a wxMemoryDC, and from that a wxGraphicsContext, then from that a wxGCDC then call wxGCDC...

Hi I am just upgrading my setup to use visual studio 2015. To do this I needed to upgrade my wxWidgets to the latest development version from github to get the VS2015 sln file. Because of the way I organise my libs (64 bit debug in lib64d folder, 64bit release in lib64 folder - all libs have same na...

Hi I am writing to ask about building wxWidgets on a server with X11, but not GTK. I am on slightly shaky ground with my knowledge about Linux display (I usually do my work on Windows). For some background I have access to a high performance compter to run simulations. The data output is very large,...

Hi Catalin I am not trying to replace perspective. I am trying to reproduce an axonometric projection which has no perspective. I am led to believe this can be reproduced by a combination of rotation and shear. For now in my code I have basically tested if wxDC transforms are supported, if not I use...

Hi I would like to draw some text on a wxDC which is transformed to make it look like it is on a 3d surface, for example on the three sides of a cube. I note that wxDC provides transformations, but the documentation states this is windows only and 2.9+. I wondered if there are some other method that...

Thanks DoubleMax Yes I was aware of the only do GUI work in the primary thread issue - well, what I really mean is that when everything started crashing I remembered it :) . The first thing I tried was adding a mutex, but this didn't seem to help. Although I never tested if the mutex ever got hit so...

Hi I'm attempting to render an animation to a wxFrame using the Windows Direct2D API. I'm using this because it provides VSYNC to avoid tearing. I have tried three ways to do this: 1) I first tried a timer, but it just wasn't quick enough I think and it gave quite jerky results. 2)I then tried a sep...

Hi I'm trying to create a Trac account to report a wxWidgets bug, but whenever I try I get a message "Trac Error Submission rejected as potential spam. SpamBayes determined spam probability of 68.76%" Has anyone got any ideas how I can actually create an account or what might be triggering the spam ...