redstrate/prism
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Fix up SDL2 mouse and key handling for imgui

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redstrate 2021-05-11 17:05:29 -04:00
parent 401961be5a
commit 2ddc1e1794
4 changed files with 46 additions and 5 deletions
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6
engine/core/include/imgui_backend.hpp
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@ -9,8 +9,12 @@ namespace prism {
void render(int index); void render(int index);
void process_key_down(unsigned int key_code); void process_mouse_down(int button);
void process_key_down(unsigned int key_code);
void process_key_up(unsigned int key_code); void process_key_up(unsigned int key_code);
private:
bool mouse_buttons[3] = {};
}; };
} }

2
engine/core/src/engine.cpp
View file

@ -479,6 +479,8 @@ void engine::process_key_up(const unsigned int keyCode) {
void engine::process_mouse_down(const int button, const prism::Offset offset) { void engine::process_mouse_down(const int button, const prism::Offset offset) {
if(current_screen != nullptr && button == 0) if(current_screen != nullptr && button == 0)
current_screen->process_mouse(offset.x, offset.y); current_screen->process_mouse(offset.x, offset.y);
imgui->process_mouse_down(button);
} }
void engine::push_event(const std::string_view name, const std::string_view data) { void engine::push_event(const std::string_view name, const std::string_view data) {

12
engine/core/src/imgui_backend.cpp
View file

@ -186,9 +186,11 @@ void imgui_backend::begin_frame(const float delta_time) {
io.MousePos = ImVec2(static_cast<float>(x), static_cast<float>(y)); io.MousePos = ImVec2(static_cast<float>(x), static_cast<float>(y));
} }
io.MouseDown[0] = platform::get_mouse_button_down(0); io.MouseDown[0] = mouse_buttons[0] || platform::get_mouse_button_down(0); // left
io.MouseDown[1] = platform::get_mouse_button_down(1); io.MouseDown[1] = mouse_buttons[1] || platform::get_mouse_button_down(1); // right
io.MouseDown[2] = mouse_buttons[2] || platform::get_mouse_button_down(2); // middle
mouse_buttons[0] = mouse_buttons[1] = mouse_buttons[2] = false;
ImGui::NewFrame(); ImGui::NewFrame();
} }
@ -217,3 +219,7 @@ void imgui_backend::process_key_up(unsigned int key_code) {
io.KeysDown[key_code] = false; io.KeysDown[key_code] = false;
} }
void imgui_backend::process_mouse_down(int button) {
mouse_buttons[button] = true;
}

31
platforms/sdl/main.cpp.in
View file

@ -222,7 +222,20 @@ prism::Offset platform::get_screen_cursor_position() {
} }
bool platform::get_mouse_button_down(const int button) { bool platform::get_mouse_button_down(const int button) {
return SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_LEFT + button); Uint8 sdl_button = SDL_BUTTON_LEFT;
switch(button) {
case 0:
sdl_button = SDL_BUTTON_LEFT;
break;
case 1:
sdl_button = SDL_BUTTON_RIGHT;
break;
case 2:
sdl_button = SDL_BUTTON_MIDDLE;
break;
}
return (SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(sdl_button)) != 0;
} }
float mouse_wheel_x, mouse_wheel_y; float mouse_wheel_x, mouse_wheel_y;
@ -288,6 +301,22 @@ int main(int argc, char* argv[]) {
mouse_wheel_y = event.wheel.y; mouse_wheel_y = event.wheel.y;
} }
break; break;
case SDL_MOUSEBUTTONDOWN:
{
int engine_button = 0;
if(event.button.button == SDL_BUTTON_RIGHT)
engine_button = 1;
else if(event.button.button == SDL_BUTTON_MIDDLE)
engine_button = 2;
engine->process_mouse_down(engine_button, {0, 0});
}
break;
case SDL_KEYDOWN:
{
engine->process_key_down(event.key.keysym.scancode);
}
break;
case SDL_WINDOWEVENT: case SDL_WINDOWEVENT:
if (event.window.event == SDL_WINDOWEVENT_RESIZED) { if (event.window.event == SDL_WINDOWEVENT_RESIZED) {
auto window = get_window_by_sdl_id(event.window.windowID); auto window = get_window_by_sdl_id(event.window.windowID);