I'm in the MFC Using OpenGL, But my projects Is a dialog,I can't find OnDraw,so I using OnPaint,
When I want to compute the FPS,Using OnPaint is wrong,OnPaint only in change Window work,so What should I do? likeness RenderLoop .
this is my projects!
https://github.com/Puuupa/MFC_OpenGL.git
Create a dedicated "control" window for the OpenGL rendering. Register this as custom control and put that into the dialog.
At least, that's how I remember, how it's done. It's been 20 years since I've used OpenGL together with the MFC.
Why are you using the MFC at all anyway, they've been deprecated for ages.
Related
I was looking at how sometimes when you right click, the menu goes outside of the window.
Is this implemented with a separate window? If so, how can I get this functionality. I am trying to use GLFW, but I understand if it isn't possible.
Currently I am on windows, but I like keeping my options open, which is why GLFW would be preferable.
I noticed that GLUT has such a feature. If you are confused to what I am looking at then look at that.
Thanks for any help!!
Overlapping menus (in MS Windows) have to be implemented as a new top-level window, you would have a new OpenGL rendering context and draw the menu in that space - yes, it's a fair bit of work all for the edge-case of a menu overspilling the parent window,
However this isn't often a problem in OpenGL programming because if you're working on a full-screen game then the menu will always be displayed within the main window, and even if it isn't a full-screen a game your users really won't notice them as games tend to use different UI concepts like radial-menus which wouldn't overspill the parent window.
Or if you're working on a non-game title, chances are it isn't full-screen and is going to be an OpenGL rendering area within a larger application that is rendered using a native UI toolkit (e.g. 3ds Max, AutoCAD, etc), in which case no problem: just use native menus.
You can, of course, use native menus in an OpenGL application anyway, provided you do the necessary plumbing for native window messages.
Okay, so, I have a C++ project I'm working on. I've created my own custom window using Cairo (I realize Cairo might not be the best for this application but it makes a lot of tasks that my GUI needs to do easier).
It controls the window size, minimizing and everything by itself, but when I create a borderless window to put it in, it still has an opaque background (my custom window has rounded borders).
How could I get the background to be transparent on at least the 3 most popular window systems? What are the platform-specific API functions that do this so that I can abstract it myself, or, is there a lightweight library that does this and will work with Cairo?
What I'm trying to achieve is something like this - that is, an OpenGL view contained in a standard window, alongside some buttons, menus, etc.
However, I'm trying to use non-managed C++ and WinAPI to accomplish that (project requirements), and, if possible, (free)GLUT.
However, it seems to me that the only thing possible using GLUT is to create a separate window. Am I right, or is there actually a way to pass a window handle to GLUT for rendering? Or am I completely off the track?
Yeah, as far as I am aware GLUT only lets you do full-blown windows and will not let you paint into an arbitrary rectangle. There are a number of tutorials on setting up a render context in Windows using nothing but the Win32 and WGL APIs. Once you get your context setup, you can effectively do everything the same way you would with GLUT, but use the appropriate WGL function for swapping buffers.
Here's a high-level overview of what would be involved, though it's really text-heavy and related to MFC it outlines the whole process. You should be able to lookup the appropriate WGL API reference to implement this.
There's really no point in using GLUT if you've already decided to use the Win32 API to be honest, it is going to try to hide everything from you including the message pump that you'll need to handle dialog initialization and button events. If your requirements weren't limited to Win32 API, I would suggest something a little more portable like Qt for a framework that's dialog-friendly and supports OpenGL.
I guess this question has been ask before, but I have not found sufficient answer to even start poking around. Most answer refers to catching WM_PAINT method directly and do custom rendering, or use a onwer draw object. However, I did not see a centralized place that has the info. to start researching. Hence, the question.
My goal is to create a very simple GUI program with custom look into it. I prefer the way winamp does their custom look that is customizable through "skins". However, I am not interested in using some cross-platform library like GTK+, QT or wxWidget.
I have some experience in system programming, but not much for GUI. I spent most of my time developing console applications, and I just started doing some QT development. If you can point me in the right direction, I'd be very appreciated.
PS: I am interested in both windows and linux environment.
Everybody,
Sorry for the late reply. I had a chance to have a quick talk with the original developer for winamp, and this is the quick answers I have:
Using skins: Artists create skins, developer will render the skins
To the OS (Windows), winamp is just one pretty box, nothing else. There is a container windows, and that's about it
All controls (button, label, list, etc) are implemented by winamp team themselves. All messages and stuffs are passed as relative position to the container window. WinAmp and the GUI engine has to decide if a button is clicked or if the label next to it is the target, etc.
Rendering artists skins created in XML
I do not have the details on if they use any libraries to do all that, but I am suspecting they do hook a window call directly, and do custom rendering themselves.
GUI skin usually using plug-in mechanism
I guess this is exactly what you are looking for:
https://www.linux.com/learn/tutorials/428800:weekend-project-creating-qt-interfaces-with-gimp?utm_medium=twitter&utm_source=twitterfeed
I also interested in creating custom look of window and widgets.
Speaking about widgets it's not hard, just need to create subclass (if you are using C++) or some widget and implement some methods like draw, handle etc. But this solution is good only if you use some high-level library like GTK, QT, etc. If you want to implement all controls by your own, you may get any graphics library, which can create window and do any graphics inside. For example, SDL2 + Cairo. SDL2 for creating window, Cairo for vector rendering controls/widgets. Both of this libraries are for win and linux. Another option is take opengl/vulkan + some lib for rendering window. It could be SDL2, SFML, GLFW.
If you really interested how it works on low level, then search Windows API for Windows and XLib or XCB for Linux/X.Org.
Speaking about window, I still investigate it. However I have one thought: you may create an empty window and then draw whatever you want. Then you need to add handlers for resizing window on the borders. But I am not sure if it's good solution, and if it won't freezes.
I am creating an application that uses popups. However, I would like to animate this popup (a win32 window, a HWND), for example having it slowly extend from the bottom of my screen, moving upwards. Should I make a few dozens of calls to the SetWindowPos function with a small pause in between, or is there a better way to do this, using c++ and win32?
You could also use the AnimateWindow() Windows API function.