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Examples: Comments to make ImGuiConfigFlags_NoMouseCursorChange more visible (#1027). + Allegro5: Added support for ImGuiConfigFlags_NoMouseCursorChange flag.

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This commit is contained in:
omar
2018-06-11 12:33:51 +02:00
parent 6f7b7807ad
commit 7acb46bec5
25 changed files with 84 additions and 49 deletions
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64
examples/imgui_impl_allegro5.cpp
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@ -2,9 +2,11 @@
// (Info: Allegro 5 is a cross-platform general purpose library for handling windows, inputs, graphics, etc.)
// Implemented features:
// [X] User texture binding. Use 'ALLEGRO_BITMAP*' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
// Missing features:
// [ ] Clipboard support via al_set_clipboard_text/al_clipboard_has_text.
// [X] Renderer: User texture binding. Use 'ALLEGRO_BITMAP*' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
// Issues:
// [ ] Renderer: The renderer is suboptimal as we need to convert vertices.
// [ ] Platform: Clipboard support via al_set_clipboard_text/al_clipboard_has_text.
// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
// If you use this binding you'll need to call 4 functions: ImGui_ImplXXXX_Init(), ImGui_ImplXXXX_NewFrame(), ImGui::Render() and ImGui_ImplXXXX_Shutdown().
@ -13,6 +15,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2018-06-11: Misc: Setup io.BackendFlags ImGuiBackendFlags_HasMouseCursors flag + honor ImGuiConfigFlags_NoMouseCursorChange flag.
// 2018-04-18: Misc: Renamed file from imgui_impl_a5.cpp to imgui_impl_allegro5.cpp.
// 2018-04-18: Misc: Added support for 32-bits vertex indices to avoid conversion at runtime. Added imconfig_allegro5.h to enforce 32-bit indices when included from imgui.h.
// 2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplAllegro5_RenderDrawData() in the .h file so you can call it yourself.
@ -175,6 +178,10 @@ bool ImGui_ImplAllegro5_Init(ALLEGRO_DISPLAY* display)
{
g_Display = display;
// Setup back-end capabilities flags
ImGuiIO& io = ImGui::GetIO();
io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
// Create custom vertex declaration.
// Unfortunately Allegro doesn't support 32-bits packed colors so we have to convert them to 4 floats.
// We still use a custom declaration to use 'ALLEGRO_PRIM_TEX_COORD' instead of 'ALLEGRO_PRIM_TEX_COORD_PIXEL' else we can't do a reliable conversion.
@ -187,7 +194,6 @@ bool ImGui_ImplAllegro5_Init(ALLEGRO_DISPLAY* display)
};
g_VertexDecl = al_create_vertex_decl(elems, sizeof(ImDrawVertAllegro));
ImGuiIO& io = ImGui::GetIO();
io.KeyMap[ImGuiKey_Tab] = ALLEGRO_KEY_TAB;
io.KeyMap[ImGuiKey_LeftArrow] = ALLEGRO_KEY_LEFT;
io.KeyMap[ImGuiKey_RightArrow] = ALLEGRO_KEY_RIGHT;
@ -224,7 +230,7 @@ void ImGui_ImplAllegro5_Shutdown()
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
bool ImGui_ImplAllegro5_ProcessEvent(ALLEGRO_EVENT *ev)
{
ImGuiIO &io = ImGui::GetIO();
ImGuiIO& io = ImGui::GetIO();
switch (ev->type)
{
@ -246,6 +252,34 @@ bool ImGui_ImplAllegro5_ProcessEvent(ALLEGRO_EVENT *ev)
return false;
}
static void ImGui_ImplAllegro5_UpdateMouseCursor()
{
ImGuiIO& io = ImGui::GetIO();
if (io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange)
return;
ImGuiMouseCursor imgui_cursor = ImGui::GetMouseCursor();
if (io.MouseDrawCursor || imgui_cursor == ImGuiMouseCursor_None)
{
// Hide OS mouse cursor if imgui is drawing it or if it wants no cursor
al_set_mouse_cursor(g_Display, g_MouseCursorInvisible);
}
else
{
ALLEGRO_SYSTEM_MOUSE_CURSOR cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_DEFAULT;
switch (imgui_cursor)
{
case ImGuiMouseCursor_TextInput: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_EDIT; break;
case ImGuiMouseCursor_ResizeAll: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_MOVE; break;
case ImGuiMouseCursor_ResizeNS: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_N; break;
case ImGuiMouseCursor_ResizeEW: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_E; break;
case ImGuiMouseCursor_ResizeNESW: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_NE; break;
case ImGuiMouseCursor_ResizeNWSE: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_NW; break;
}
al_set_system_mouse_cursor(g_Display, cursor_id);
}
}
void ImGui_ImplAllegro5_NewFrame()
{
if (!g_Texture)
@ -288,23 +322,5 @@ void ImGui_ImplAllegro5_NewFrame()
io.MouseDown[1] = mouse.buttons & (1 << 1);
io.MouseDown[2] = mouse.buttons & (1 << 2);
// Hide OS mouse cursor if ImGui is drawing it
if (io.MouseDrawCursor)
{
al_set_mouse_cursor(g_Display, g_MouseCursorInvisible);
}
else
{
ALLEGRO_SYSTEM_MOUSE_CURSOR cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_DEFAULT;
switch (ImGui::GetMouseCursor())
{
case ImGuiMouseCursor_TextInput: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_EDIT; break;
case ImGuiMouseCursor_ResizeAll: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_MOVE; break;
case ImGuiMouseCursor_ResizeNS: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_N; break;
case ImGuiMouseCursor_ResizeEW: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_E; break;
case ImGuiMouseCursor_ResizeNESW: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_NE; break;
case ImGuiMouseCursor_ResizeNWSE: cursor_id = ALLEGRO_SYSTEM_MOUSE_CURSOR_RESIZE_NW; break;
}
al_set_system_mouse_cursor(g_Display, cursor_id);
}
ImGui_ImplAllegro5_UpdateMouseCursor();
}