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Viewport, Platform: Win32: Fixed handling of io.WantSetMousePos + added a bunch of comments. GLFW, SDL2: Added handling of io.WantSetMousePos. (#1542)

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This commit is contained in:
omar
2018-05-11 14:05:40 +02:00
parent 6eacddb50f
commit d574604a5d
3 changed files with 64 additions and 40 deletions
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17
examples/imgui_impl_sdl2.cpp
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@@ -33,6 +33,7 @@
// (the multi-viewports feature requires SDL features supported from SDL 2.0.5+)
#include <SDL.h>
#include <SDL_syswm.h>
#define SDL_HAS_WARP_MOUSE_GLOBAL SDL_VERSION_ATLEAST(2,0,4)
#define SDL_HAS_CAPTURE_MOUSE SDL_VERSION_ATLEAST(2,0,4)
#define SDL_HAS_WINDOW_OPACITY SDL_VERSION_ATLEAST(2,0,5)
#define SDL_HAS_ALWAYS_ON_TOP SDL_VERSION_ATLEAST(2,0,5)
@@ -131,6 +132,9 @@ bool ImGui_ImplSDL2_Init(SDL_Window* window, void* sdl_gl_context)
// Setup back-end capabilities flags
ImGuiIO& io = ImGui::GetIO();
io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
#if SDL_HAS_WARP_MOUSE_GLOBAL
io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
#endif
#if SDL_HAS_CAPTURE_MOUSE
io.BackendFlags |= ImGuiBackendFlags_PlatformHasViewports; // We can create multi-viewports on the Platform side (optional)
#endif
@@ -196,10 +200,23 @@ void ImGui_ImplSDL2_Shutdown()
static void ImGui_ImplSDL2_UpdateMouse()
{
ImGuiIO& io = ImGui::GetIO();
const ImVec2 mouse_pos_backup = io.MousePos;
io.MousePos = ImVec2(-FLT_MAX, -FLT_MAX);
io.MousePosViewport = 0;
io.MouseHoveredViewport = 0;
// Set OS mouse position if requested (rarely used, only when ImGuiConfigFlags_NavEnableSetMousePos is enabled by user)
// (When multi-viewports are enabled, all imgui positions are same as OS positions.)
#if SDL_HAS_WARP_MOUSE_GLOBAL
if (io.WantSetMousePos)
{
if ((io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) == 0)
SDL_WarpMouseInWindow(g_Window, (int)mouse_pos_backup.x, (int)mouse_pos_backup.y);
else
SDL_WarpMouseGlobal((int)mouse_pos_backup.x, (int)mouse_pos_backup.y);
}
#endif
int mx, my;
Uint32 mouse_buttons = SDL_GetMouseState(&mx, &my);
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.