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Examples: imgui_impl_osx: Added mouse cursor support. (#2585, #1873)

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This commit is contained in:
actboy168
2019-05-28 17:15:59 +08:00
committed by omar
parent 2d68e892a8
commit c0e690318a
1 changed files with 59 additions and 1 deletions
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60
examples/imgui_impl_osx.mm
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@@ -19,6 +19,16 @@
// Data
static CFAbsoluteTime g_Time = 0.0;
static NSCursor* g_MouseCursors[ImGuiMouseCursor_COUNT] = { 0 };
static bool g_MouseCursorHidden = false;
// Undocumented methods for creating cursors.
@interface NSCursor()
+ (id)_windowResizeNorthWestSouthEastCursor;
+ (id)_windowResizeNorthEastSouthWestCursor;
+ (id)_windowResizeNorthSouthCursor;
+ (id)_windowResizeEastWestCursor;
@end
// Functions
bool ImGui_ImplOSX_Init()
@@ -26,7 +36,7 @@ bool ImGui_ImplOSX_Init()
ImGuiIO& io = ImGui::GetIO();
// Setup back-end capabilities flags
//io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
//io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
//io.BackendFlags |= ImGuiBackendFlags_PlatformHasViewports; // We can create multi-viewports on the Platform side (optional)
//io.BackendFlags |= ImGuiBackendFlags_HasMouseHoveredViewport; // We can set io.MouseHoveredViewport correctly (optional, not easy)
@@ -56,6 +66,24 @@ bool ImGui_ImplOSX_Init()
io.KeyMap[ImGuiKey_Y] = 'Y';
io.KeyMap[ImGuiKey_Z] = 'Z';
g_MouseCursorHidden = false;
g_MouseCursors[ImGuiMouseCursor_Arrow] = [NSCursor arrowCursor];
g_MouseCursors[ImGuiMouseCursor_TextInput] = [NSCursor IBeamCursor];
g_MouseCursors[ImGuiMouseCursor_ResizeAll] = [NSCursor closedHandCursor];
g_MouseCursors[ImGuiMouseCursor_Hand] = [NSCursor pointingHandCursor];
g_MouseCursors[ImGuiMouseCursor_ResizeNS] = [NSCursor respondsToSelector:@selector(_windowResizeNorthSouthCursor)]
? [NSCursor _windowResizeNorthSouthCursor]
: [NSCursor resizeUpDownCursor];
g_MouseCursors[ImGuiMouseCursor_ResizeEW] = [NSCursor respondsToSelector:@selector(_windowResizeEastWestCursor)]
? [NSCursor _windowResizeEastWestCursor]
: [NSCursor resizeLeftRightCursor];
g_MouseCursors[ImGuiMouseCursor_ResizeNESW] = [NSCursor respondsToSelector:@selector(_windowResizeNorthEastSouthWestCursor)]
? [NSCursor _windowResizeNorthEastSouthWestCursor]
: [NSCursor closedHandCursor];
g_MouseCursors[ImGuiMouseCursor_ResizeNWSE] = [NSCursor respondsToSelector:@selector(_windowResizeNorthWestSouthEastCursor)]
? [NSCursor _windowResizeNorthWestSouthEastCursor]
: [NSCursor closedHandCursor];
// We don't set the io.SetClipboardTextFn/io.GetClipboardTextFn handlers,
// because imgui.cpp has a default for them that works with OSX.
@@ -66,6 +94,34 @@ void ImGui_ImplOSX_Shutdown()
{
}
static void ImGui_ImplOSX_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
if (!g_MouseCursorHidden)
{
g_MouseCursorHidden = true;
[NSCursor hide];
}
}
else
{
// Show OS mouse cursor
[g_MouseCursors[g_MouseCursors[imgui_cursor]? imgui_cursor: ImGuiMouseCursor_Arrow] set];
if (g_MouseCursorHidden)
{
g_MouseCursorHidden = false;
[NSCursor unhide];
}
}
}
void ImGui_ImplOSX_NewFrame(NSView* view)
{
// Setup display size
@@ -80,6 +136,8 @@ void ImGui_ImplOSX_NewFrame(NSView* view)
CFAbsoluteTime current_time = CFAbsoluteTimeGetCurrent();
io.DeltaTime = current_time - g_Time;
g_Time = current_time;
ImGui_ImplOSX_UpdateMouseCursor();
}
static int mapCharacterToKey(int c)