Handling Exceeded Minimum Window Size

What happens if the minimum window size exceeds the current window size?

If you set a minimum window size in SDL using SDL_SetWindowMinimumSize() and the current window size is smaller than this new minimum, SDL will automatically resize the window to meet the minimum size constraints.

This behavior ensures that the window size remains valid according to the constraints you've defined.

Here's a code example to demonstrate this:

#include <SDL.h>
#include <iostream>

int main() {
  if (SDL_Init(SDL_INIT_VIDEO) != 0) {
    std::cerr << "SDL Initialization failed: "
      << SDL_GetError() << "\n";
    return 1;
  }

  SDL_Window* window =
    SDL_CreateWindow("Minimum Size Example",
                     SDL_WINDOWPOS_CENTERED,
                     SDL_WINDOWPOS_CENTERED,
                     200, 200,
                     SDL_WINDOW_RESIZABLE);

  if (!window) {
    std::cerr << "Window creation failed: " <<
      SDL_GetError() << "\n";
    SDL_Quit();
    return 1;
  }

  // Set minimum size larger than current size
  SDL_SetWindowMinimumSize(window, 300, 300);

  int width, height;
  SDL_GetWindowSize(window, &width, &height);

  std::cout <<
    "Window size after setting minimum: " <<
    width << "x" << height
    << "\n";

  SDL_DestroyWindow(window);
  SDL_Quit();

  return 0;
}
Window size after setting minimum: 300x300

You'll see the window immediately resize to 300x300 because the minimum size constraints were applied after the initial size was smaller.

It's worth noting that this behavior can be disorienting for users, especially if they aren't expecting their window size to change abruptly. In a real-world scenario, you might want to notify users or use graceful resizing animations.

Additionally, if you're working with a game or graphical application, remember that any sudden resize may impact your layout or rendering logic. Always test thoroughly when applying size constraints dynamically.

Window Sizing

Learn how to resize, constrain, and manage SDL2 windows

Questions & Answers

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

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How does resizing affect graphical content displayed inside the window?
Constraints in SDL_SetWindowSize()
Is SDL_SetWindowSize() affected by the maximum and minimum size constraints?
Size Changed vs Resized Events
What is the difference between SDL_WINDOWEVENT_SIZE_CHANGED and SDL_WINDOWEVENT_RESIZED?
Best Practices for Resize Events
What are the best practices for handling resize events in games?
Integer Pointers in SDL
Why does SDL require integer pointers in functions like SDL_GetWindowSize()?
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