imgui glfw3 GLEQ eventhandler #3034
Description
Not really an issue, but I'd like to share a code snippet for people using imgui with GLEQ.
GLEQ is a simple (SDL like) event queue for GLFW3. It replaces all the callbacks of the glfw window, so keyboard-, textinput and scrollinput in ImGui will be lost.
To get my inputs back in dear ImGui, I made a "ProcessEvent" function, derived from: ImGui_ImplSDL2_ProcessEvent(const SDL_Event* event)
Run this function in the while gleqNextEvent() loop:
bool ProcessEvent(GLEQevent* event)
{
ImGuiIO& io = ImGui::GetIO();
switch (event->type)
{
case GLEQ_SCROLLED:
{
if (event->scroll.x > 0) io.MouseWheelH += 1;
if (event->scroll.x < 0) io.MouseWheelH -= 1;
if (event->scroll.y > 0) io.MouseWheel += 1;
if (event->scroll.y < 0) io.MouseWheel -= 1;
return true;
}
case GLEQ_BUTTON_PRESSED:
{
if (event->mouse.button == 0) io.MouseDown[0] = true;
if (event->mouse.button == 1) io.MouseDown[1] = true;
if (event->mouse.button == 2) io.MouseDown[2] = true;
return true;
}
case GLEQ_CODEPOINT_INPUT:
{
//io.AddInputCharactersUTF8(event->codepoint);
io.AddInputCharacter(event->codepoint);
return true;
}
case GLEQ_KEY_PRESSED:
case GLEQ_KEY_RELEASED:
{
//std::cout << (event->keyboard.mods) << std::endl;
int key = event->keyboard.key;
IM_ASSERT(key >= 0 && key < IM_ARRAYSIZE(io.KeysDown));
io.KeysDown[key] = (event->type == GLEQ_KEY_PRESSED);
io.KeyShift = (event->keyboard.mods == 1);
io.KeyCtrl = (event->keyboard.mods == 2);
io.KeyAlt = (event->keyboard.mods == 4);
io.KeySuper = (event->keyboard.mods == 8);
return true;
}
}
return false;
}