Simulating SDL_WINDOWEVENT

How can I simulate a SDL_WINDOWEVENT for testing purposes?

Simulating an SDL_WINDOWEVENT is useful for testing how your application responds to window-related events. SDL supports event simulation through SDL_PushEvent().

Here's an example of simulating a window resize event:

SDL_Event resizeEvent;
resizeEvent.type = SDL_WINDOWEVENT;
resizeEvent.window.event =
  SDL_WINDOWEVENT_RESIZED;
resizeEvent.window.windowID =
  SDL_GetWindowID(myWindow);
resizeEvent.window.data1 = 1024;  // New width
resizeEvent.window.data2 = 768;   // New height

SDL_PushEvent(&resizeEvent);

Key Points

  • Window ID: Ensure the windowID matches an actual SDL window.
  • Event Data: Populate relevant fields, such as data1 and data2 for dimensions.

Testing Workflow

You can use this technique to simulate multiple scenarios, like minimizing, focusing, or resizing windows, without needing manual user input. Simulating events helps in automating tests for event-driven logic.

With proper event simulation, you can ensure your application behaves correctly under various conditions.

Window Events and Window IDs

Discover how to monitor and respond to window state changes in SDL applications

Questions & Answers

Answers are generated by AI models and may not have been reviewed. Be mindful when running any code on your device.

Purpose of SDL Window Events
Why do we monitor SDL window events rather than continuously checking window properties?
How Window IDs Work
What are SDL window IDs, and how are they useful?
Changing Window IDs
Can I change a window's ID after it's created?
SDL_WINDOWEVENT_ENTER Triggering Issues
Why does SDL_WINDOWEVENT_ENTER not always trigger when expected?
Handling External Library Windows
How can I handle events for windows created by external libraries?
SDL_WINDOWEVENT_CLOSE vs SDL_QUIT
What's the difference between SDL_WINDOWEVENT_CLOSE and SDL_QUIT?
Handling Invalid Window IDs
What happens if I pass an invalid windowID to SDL_GetWindowFromID()?
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