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refactored event handling; added _dirty flag to only update when dirty

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This commit is contained in:
Bob Polis
2020-11-13 16:54:49 +01:00
parent 6202c7dba7
commit 32ac8b4e0f
2 changed files with 38 additions and 16 deletions
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45
src/Window.cpp
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@ -53,18 +53,12 @@ bool Window::handle_global_event(const SDL_Event& event) {
}
}
switch (event.window.event) {
case SDL_WINDOWEVENT_CLOSE: {
// remove window from window list
SDL_Window* w {SDL_GetWindowFromID(event.window.windowID)};
auto it = std::remove_if(_windows.begin(), _windows.end(), [w](Window& win) {
return win.window() == w;
});
_windows.erase(it, _windows.end());
if (_windows.size() == 0) {
quit = true;
}
case SDL_WINDOWEVENT_CLOSE:
quit = close(event);
break;
case SDL_WINDOWEVENT_EXPOSED:
quit = expose(event);
break;
}
default:
break;
}
@ -81,6 +75,24 @@ void Window::add_global_event_handler(WindowEventHandler handler, SDL_WindowEven
}
}
bool Window::expose(const SDL_Event& event) {
Window* w {from_sdl(event.window.windowID)};
if (w) w->dirty(true);
return false;
}
bool Window::close(const SDL_Event& event) {
// remove window from window list
SDL_Window* w {SDL_GetWindowFromID(event.window.windowID)};
auto it = std::remove_if(_windows.begin(), _windows.end(), [w](Window& win) {
return win.window() == w;
});
_windows.erase(it, _windows.end());
// quit if it was the last window
return _windows.size() == 0;
}
Window::Window(const std::string& title) : _title {title} {
SDL_Window* win = SDL_CreateWindow(title.c_str(),
SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
@ -94,10 +106,13 @@ void Window::set_size(int w, int h) {
SDL_SetWindowSize(_w.get(), w, h);
}
void Window::update() const {
SDL_RenderClear(_r.get());
SDL_RenderCopy(_r.get(), _t.get(), nullptr, nullptr);
SDL_RenderPresent(_r.get());
void Window::update() {
if (_dirty) {
_dirty = false;
SDL_RenderClear(_r.get());
SDL_RenderCopy(_r.get(), _t.get(), nullptr, nullptr);
SDL_RenderPresent(_r.get());
}
}
void Window::show_image(const Image& image) {