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278 lines
11 KiB
Plaintext
278 lines
11 KiB
Plaintext
// dear imgui: Platform Binding for OSX / Cocoa
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// This needs to be used along with a Renderer (e.g. OpenGL2, OpenGL3, Vulkan, Metal..)
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// [BETA] Beta bindings, not well tested. If you want a portable application, prefer using the Glfw or SDL platform bindings on Mac.
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// Issues:
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// [ ] Platform: Keys are all generally very broken. Best using [event keycode] and not [event characters]..
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// [ ] Platform: Mouse cursor shapes and visibility are not supported (see end of https://github.com/glfw/glfw/issues/427)
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#include "imgui.h"
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#include "imgui_impl_osx.h"
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#import <Cocoa/Cocoa.h>
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// CHANGELOG
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// (minor and older changes stripped away, please see git history for details)
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// 2019-05-18: Misc: Removed clipboard handlers as they are now supported by core imgui.cpp.
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// 2019-05-11: Inputs: Don't filter character values before calling AddInputCharacter() apart from 0xF700..0xFFFF range.
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// 2018-11-30: Misc: Setting up io.BackendPlatformName so it can be displayed in the About Window.
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// 2018-07-07: Initial version.
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// Data
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static CFAbsoluteTime g_Time = 0.0;
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static NSCursor* g_MouseCursors[ImGuiMouseCursor_COUNT] = { 0 };
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static bool g_MouseCursorHidden = false;
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// Undocumented methods for creating cursors.
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@interface NSCursor()
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+ (id)_windowResizeNorthWestSouthEastCursor;
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+ (id)_windowResizeNorthEastSouthWestCursor;
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+ (id)_windowResizeNorthSouthCursor;
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+ (id)_windowResizeEastWestCursor;
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@end
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// Functions
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bool ImGui_ImplOSX_Init()
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{
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ImGuiIO& io = ImGui::GetIO();
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// Setup back-end capabilities flags
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io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
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//io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
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//io.BackendFlags |= ImGuiBackendFlags_PlatformHasViewports; // We can create multi-viewports on the Platform side (optional)
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//io.BackendFlags |= ImGuiBackendFlags_HasMouseHoveredViewport; // We can set io.MouseHoveredViewport correctly (optional, not easy)
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io.BackendPlatformName = "imgui_impl_osx";
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// Keyboard mapping. ImGui will use those indices to peek into the io.KeyDown[] array.
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const int offset_for_function_keys = 256 - 0xF700;
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io.KeyMap[ImGuiKey_Tab] = '\t';
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io.KeyMap[ImGuiKey_LeftArrow] = NSLeftArrowFunctionKey + offset_for_function_keys;
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io.KeyMap[ImGuiKey_RightArrow] = NSRightArrowFunctionKey + offset_for_function_keys;
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io.KeyMap[ImGuiKey_UpArrow] = NSUpArrowFunctionKey + offset_for_function_keys;
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io.KeyMap[ImGuiKey_DownArrow] = NSDownArrowFunctionKey + offset_for_function_keys;
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io.KeyMap[ImGuiKey_PageUp] = NSPageUpFunctionKey + offset_for_function_keys;
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io.KeyMap[ImGuiKey_PageDown] = NSPageDownFunctionKey + offset_for_function_keys;
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io.KeyMap[ImGuiKey_Home] = NSHomeFunctionKey + offset_for_function_keys;
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io.KeyMap[ImGuiKey_End] = NSEndFunctionKey + offset_for_function_keys;
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io.KeyMap[ImGuiKey_Insert] = NSInsertFunctionKey + offset_for_function_keys;
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io.KeyMap[ImGuiKey_Delete] = NSDeleteFunctionKey + offset_for_function_keys;
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io.KeyMap[ImGuiKey_Backspace] = 127;
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io.KeyMap[ImGuiKey_Space] = 32;
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io.KeyMap[ImGuiKey_Enter] = 13;
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io.KeyMap[ImGuiKey_Escape] = 27;
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io.KeyMap[ImGuiKey_A] = 'A';
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io.KeyMap[ImGuiKey_C] = 'C';
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io.KeyMap[ImGuiKey_V] = 'V';
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io.KeyMap[ImGuiKey_X] = 'X';
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io.KeyMap[ImGuiKey_Y] = 'Y';
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io.KeyMap[ImGuiKey_Z] = 'Z';
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g_MouseCursorHidden = false;
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g_MouseCursors[ImGuiMouseCursor_Arrow] = [NSCursor arrowCursor];
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g_MouseCursors[ImGuiMouseCursor_TextInput] = [NSCursor IBeamCursor];
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g_MouseCursors[ImGuiMouseCursor_ResizeAll] = [NSCursor closedHandCursor];
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g_MouseCursors[ImGuiMouseCursor_Hand] = [NSCursor pointingHandCursor];
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g_MouseCursors[ImGuiMouseCursor_ResizeNS] = [NSCursor respondsToSelector:@selector(_windowResizeNorthSouthCursor)]
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? [NSCursor _windowResizeNorthSouthCursor]
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: [NSCursor resizeUpDownCursor];
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g_MouseCursors[ImGuiMouseCursor_ResizeEW] = [NSCursor respondsToSelector:@selector(_windowResizeEastWestCursor)]
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? [NSCursor _windowResizeEastWestCursor]
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: [NSCursor resizeLeftRightCursor];
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g_MouseCursors[ImGuiMouseCursor_ResizeNESW] = [NSCursor respondsToSelector:@selector(_windowResizeNorthEastSouthWestCursor)]
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? [NSCursor _windowResizeNorthEastSouthWestCursor]
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: [NSCursor closedHandCursor];
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g_MouseCursors[ImGuiMouseCursor_ResizeNWSE] = [NSCursor respondsToSelector:@selector(_windowResizeNorthWestSouthEastCursor)]
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? [NSCursor _windowResizeNorthWestSouthEastCursor]
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: [NSCursor closedHandCursor];
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// We don't set the io.SetClipboardTextFn/io.GetClipboardTextFn handlers,
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// because imgui.cpp has a default for them that works with OSX.
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return true;
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}
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void ImGui_ImplOSX_Shutdown()
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{
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}
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static void ImGui_ImplOSX_UpdateMouseCursor()
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{
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ImGuiIO& io = ImGui::GetIO();
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if (io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange)
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return;
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ImGuiMouseCursor imgui_cursor = ImGui::GetMouseCursor();
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if (io.MouseDrawCursor || imgui_cursor == ImGuiMouseCursor_None)
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{
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// Hide OS mouse cursor if imgui is drawing it or if it wants no cursor
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if (!g_MouseCursorHidden)
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{
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g_MouseCursorHidden = true;
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[NSCursor hide];
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}
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}
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else
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{
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// Show OS mouse cursor
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[g_MouseCursors[g_MouseCursors[imgui_cursor]? imgui_cursor: ImGuiMouseCursor_Arrow] set];
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if (g_MouseCursorHidden)
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{
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g_MouseCursorHidden = false;
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[NSCursor unhide];
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}
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}
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}
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void ImGui_ImplOSX_NewFrame(NSView* view)
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{
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// Setup display size
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ImGuiIO& io = ImGui::GetIO();
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const float dpi = [view.window backingScaleFactor];
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io.DisplaySize = ImVec2((float)view.bounds.size.width, (float)view.bounds.size.height);
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io.DisplayFramebufferScale = ImVec2(dpi, dpi);
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// Setup time step
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if (g_Time == 0.0)
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g_Time = CFAbsoluteTimeGetCurrent();
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CFAbsoluteTime current_time = CFAbsoluteTimeGetCurrent();
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io.DeltaTime = current_time - g_Time;
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g_Time = current_time;
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ImGui_ImplOSX_UpdateMouseCursor();
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}
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static int mapCharacterToKey(int c)
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{
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if (c >= 'a' && c <= 'z')
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return c - 'a' + 'A';
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if (c == 25) // SHIFT+TAB -> TAB
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return 9;
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if (c >= 0 && c < 256)
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return c;
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if (c >= 0xF700 && c < 0xF700 + 256)
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return c - 0xF700 + 256;
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return -1;
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}
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static void resetKeys()
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{
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ImGuiIO& io = ImGui::GetIO();
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for (int n = 0; n < IM_ARRAYSIZE(io.KeysDown); n++)
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io.KeysDown[n] = false;
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}
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bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view)
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{
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ImGuiIO& io = ImGui::GetIO();
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if (event.type == NSEventTypeLeftMouseDown || event.type == NSEventTypeRightMouseDown || event.type == NSEventTypeOtherMouseDown)
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{
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int button = (int)[event buttonNumber];
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if (button >= 0 && button < IM_ARRAYSIZE(io.MouseDown))
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io.MouseDown[button] = true;
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return io.WantCaptureMouse;
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}
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if (event.type == NSEventTypeLeftMouseUp || event.type == NSEventTypeRightMouseUp || event.type == NSEventTypeOtherMouseUp)
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{
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int button = (int)[event buttonNumber];
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if (button >= 0 && button < IM_ARRAYSIZE(io.MouseDown))
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io.MouseDown[button] = false;
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return io.WantCaptureMouse;
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}
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if (event.type == NSEventTypeMouseMoved || event.type == NSEventTypeLeftMouseDragged)
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{
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NSPoint mousePoint = event.locationInWindow;
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mousePoint = [view convertPoint:mousePoint fromView:nil];
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mousePoint = NSMakePoint(mousePoint.x, view.bounds.size.height - mousePoint.y);
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io.MousePos = ImVec2(mousePoint.x, mousePoint.y);
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}
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if (event.type == NSEventTypeScrollWheel)
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{
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double wheel_dx = 0.0;
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double wheel_dy = 0.0;
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#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
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if (floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_6)
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{
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wheel_dx = [event scrollingDeltaX];
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wheel_dy = [event scrollingDeltaY];
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if ([event hasPreciseScrollingDeltas])
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{
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wheel_dx *= 0.1;
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wheel_dy *= 0.1;
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}
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}
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else
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#endif /*MAC_OS_X_VERSION_MAX_ALLOWED*/
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{
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wheel_dx = [event deltaX];
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wheel_dy = [event deltaY];
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}
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if (fabs(wheel_dx) > 0.0)
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io.MouseWheelH += wheel_dx * 0.1f;
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if (fabs(wheel_dy) > 0.0)
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io.MouseWheel += wheel_dy * 0.1f;
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return io.WantCaptureMouse;
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}
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// FIXME: All the key handling is wrong and broken. Refer to GLFW's cocoa_init.mm and cocoa_window.mm.
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if (event.type == NSEventTypeKeyDown)
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{
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NSString* str = [event characters];
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int len = (int)[str length];
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for (int i = 0; i < len; i++)
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{
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int c = [str characterAtIndex:i];
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if (!io.KeyCtrl && !(c >= 0xF700 && c <= 0xFFFF))
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io.AddInputCharacter((unsigned int)c);
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// We must reset in case we're pressing a sequence of special keys while keeping the command pressed
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int key = mapCharacterToKey(c);
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if (key != -1 && key < 256 && !io.KeyCtrl)
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resetKeys();
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if (key != -1)
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io.KeysDown[key] = true;
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}
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return io.WantCaptureKeyboard;
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}
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if (event.type == NSEventTypeKeyUp)
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{
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NSString* str = [event characters];
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int len = (int)[str length];
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for (int i = 0; i < len; i++)
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{
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int c = [str characterAtIndex:i];
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int key = mapCharacterToKey(c);
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if (key != -1)
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io.KeysDown[key] = false;
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}
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return io.WantCaptureKeyboard;
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}
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if (event.type == NSEventTypeFlagsChanged)
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{
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ImGuiIO& io = ImGui::GetIO();
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unsigned int flags = [event modifierFlags] & NSEventModifierFlagDeviceIndependentFlagsMask;
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bool oldKeyCtrl = io.KeyCtrl;
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bool oldKeyShift = io.KeyShift;
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bool oldKeyAlt = io.KeyAlt;
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bool oldKeySuper = io.KeySuper;
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io.KeyCtrl = flags & NSEventModifierFlagControl;
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io.KeyShift = flags & NSEventModifierFlagShift;
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io.KeyAlt = flags & NSEventModifierFlagOption;
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io.KeySuper = flags & NSEventModifierFlagCommand;
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// We must reset them as we will not receive any keyUp event if they where pressed with a modifier
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if ((oldKeyShift && !io.KeyShift) || (oldKeyCtrl && !io.KeyCtrl) || (oldKeyAlt && !io.KeyAlt) || (oldKeySuper && !io.KeySuper))
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resetKeys();
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return io.WantCaptureKeyboard;
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}
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return false;
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}
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