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Examples: SDL: SDL_GetMouseState() seems problematic, movements feels laggy in the non-viewport code path. (#1542, #2117)

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omar 2018-12-20 22:28:31 +01:00
parent 02501f07c3
commit 8dd83c5fe8
1 changed files with 17 additions and 17 deletions
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24
examples/imgui_impl_sdl.cpp
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@ -253,39 +253,39 @@ static void ImGui_ImplSDL2_UpdateMousePosAndButtons()
io.MousePos = ImVec2(-FLT_MAX, -FLT_MAX);
#endif
int mx, my;
Uint32 mouse_buttons = SDL_GetMouseState(&mx, &my);
int mouse_x, mouse_y;
Uint32 mouse_buttons = SDL_GetMouseState(&mouse_x, &mouse_y); // NB: We don't use the x/y results from SDL_GetMouseState()
SDL_GetGlobalMouseState(&mouse_x, &mouse_y);
io.MouseDown[0] = g_MousePressed[0] || (mouse_buttons & SDL_BUTTON(SDL_BUTTON_LEFT)) != 0; // If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
io.MouseDown[1] = g_MousePressed[1] || (mouse_buttons & SDL_BUTTON(SDL_BUTTON_RIGHT)) != 0;
io.MouseDown[2] = g_MousePressed[2] || (mouse_buttons & SDL_BUTTON(SDL_BUTTON_MIDDLE)) != 0;
g_MousePressed[0] = g_MousePressed[1] = g_MousePressed[2] = false;
#if SDL_HAS_CAPTURE_MOUSE && !defined(__EMSCRIPTEN__)
SDL_Window* focused_window = SDL_GetKeyboardFocus();
if (focused_window)
{
if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
{
// Multi-viewport mode: mouse position in OS absolute coordinates (io.MousePos is (0,0) when the mouse is on the upper-left of the primary monitor)
SDL_GetGlobalMouseState(&mx, &my);
if (SDL_Window* focused_window = SDL_GetKeyboardFocus())
if (ImGui::FindViewportByPlatformHandle((void*)focused_window) != NULL)
io.MousePos = ImVec2((float)mx, (float)my);
io.MousePos = ImVec2((float)mouse_x, (float)mouse_y);
}
else
#endif
{
// Single viewport mode: mouse position in client window coordinates (io.MousePos is (0,0) when the mouse is on the upper-left corner of the app window)
if (focused_window == g_Window)
io.MousePos = ImVec2((float)mx, (float)my);
if (SDL_GetWindowFlags(g_Window) & SDL_WINDOW_INPUT_FOCUS)
{
int window_x, window_y;
SDL_GetWindowPosition(g_Window, &window_x, &window_y);
io.MousePos = ImVec2((float)(mouse_x - window_x), (float)(mouse_y - window_y));
}
}
// We already retrieve global mouse position, SDL_CaptureMouse() also let the OS know e.g. that our imgui drag outside the SDL window boundaries shouldn't trigger the OS window resize cursor
// The function is only supported from SDL 2.0.4 (released Jan 2016)
#if SDL_HAS_CAPTURE_MOUSE
bool any_mouse_button_down = ImGui::IsAnyMouseDown();
SDL_CaptureMouse(any_mouse_button_down ? SDL_TRUE : SDL_FALSE);
#else
if (SDL_GetWindowFlags(g_Window) & SDL_WINDOW_INPUT_FOCUS)
io.MousePos = ImVec2((float)mx, (float)my);
#endif
}