main.mm (10952B)
1 // Dear ImGui: standalone example application for OSX + OpenGL2, using legacy fixed pipeline 2 // If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp. 3 // Read online: https://github.com/ocornut/imgui/tree/master/docs 4 5 #include "imgui.h" 6 #include "../../backends/imgui_impl_osx.h" 7 #include "../../backends/imgui_impl_opengl2.h" 8 #include <stdio.h> 9 #import <Cocoa/Cocoa.h> 10 #import <OpenGL/gl.h> 11 #import <OpenGL/glu.h> 12 13 //----------------------------------------------------------------------------------- 14 // ImGuiExampleView 15 //----------------------------------------------------------------------------------- 16 17 @interface ImGuiExampleView : NSOpenGLView 18 { 19 NSTimer* animationTimer; 20 } 21 @end 22 23 @implementation ImGuiExampleView 24 25 -(void)animationTimerFired:(NSTimer*)timer 26 { 27 [self setNeedsDisplay:YES]; 28 } 29 30 -(void)prepareOpenGL 31 { 32 [super prepareOpenGL]; 33 34 #ifndef DEBUG 35 GLint swapInterval = 1; 36 [[self openGLContext] setValues:&swapInterval forParameter:NSOpenGLCPSwapInterval]; 37 if (swapInterval == 0) 38 NSLog(@"Error: Cannot set swap interval."); 39 #endif 40 } 41 42 -(void)updateAndDrawDemoView 43 { 44 // Start the Dear ImGui frame 45 ImGui_ImplOpenGL2_NewFrame(); 46 ImGui_ImplOSX_NewFrame(self); 47 ImGui::NewFrame(); 48 49 // Our state (make them static = more or less global) as a convenience to keep the example terse. 50 static bool show_demo_window = true; 51 static bool show_another_window = false; 52 static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f); 53 54 // 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!). 55 if (show_demo_window) 56 ImGui::ShowDemoWindow(&show_demo_window); 57 58 // 2. Show a simple window that we create ourselves. We use a Begin/End pair to created a named window. 59 { 60 static float f = 0.0f; 61 static int counter = 0; 62 63 ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it. 64 65 ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too) 66 ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state 67 ImGui::Checkbox("Another Window", &show_another_window); 68 69 ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f 70 ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color 71 72 if (ImGui::Button("Button")) // Buttons return true when clicked (most widgets return true when edited/activated) 73 counter++; 74 ImGui::SameLine(); 75 ImGui::Text("counter = %d", counter); 76 77 ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate); 78 ImGui::End(); 79 } 80 81 // 3. Show another simple window. 82 if (show_another_window) 83 { 84 ImGui::Begin("Another Window", &show_another_window); // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked) 85 ImGui::Text("Hello from another window!"); 86 if (ImGui::Button("Close Me")) 87 show_another_window = false; 88 ImGui::End(); 89 } 90 91 // Rendering 92 ImGui::Render(); 93 [[self openGLContext] makeCurrentContext]; 94 95 ImDrawData* draw_data = ImGui::GetDrawData(); 96 GLsizei width = (GLsizei)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x); 97 GLsizei height = (GLsizei)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y); 98 glViewport(0, 0, width, height); 99 100 glClearColor(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w); 101 glClear(GL_COLOR_BUFFER_BIT); 102 ImGui_ImplOpenGL2_RenderDrawData(draw_data); 103 104 // Present 105 [[self openGLContext] flushBuffer]; 106 107 if (!animationTimer) 108 animationTimer = [NSTimer scheduledTimerWithTimeInterval:0.017 target:self selector:@selector(animationTimerFired:) userInfo:nil repeats:YES]; 109 } 110 111 -(void)reshape 112 { 113 [[self openGLContext] update]; 114 [self updateAndDrawDemoView]; 115 } 116 117 -(void)drawRect:(NSRect)bounds 118 { 119 [self updateAndDrawDemoView]; 120 } 121 122 -(BOOL)acceptsFirstResponder 123 { 124 return (YES); 125 } 126 127 -(BOOL)becomeFirstResponder 128 { 129 return (YES); 130 } 131 132 -(BOOL)resignFirstResponder 133 { 134 return (YES); 135 } 136 137 -(void)dealloc 138 { 139 animationTimer = nil; 140 } 141 142 // Forward Mouse/Keyboard events to Dear ImGui OSX backend. 143 -(void)keyUp:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 144 -(void)keyDown:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 145 -(void)flagsChanged:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 146 -(void)mouseDown:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 147 -(void)rightMouseDown:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 148 -(void)otherMouseDown:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 149 -(void)mouseUp:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 150 -(void)rightMouseUp:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 151 -(void)otherMouseUp:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 152 -(void)mouseMoved:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 153 -(void)rightMouseMoved:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 154 -(void)otherMouseMoved:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 155 -(void)mouseDragged:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 156 -(void)rightMouseDragged:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 157 -(void)otherMouseDragged:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 158 -(void)scrollWheel:(NSEvent *)event { ImGui_ImplOSX_HandleEvent(event, self); } 159 160 @end 161 162 //----------------------------------------------------------------------------------- 163 // ImGuiExampleAppDelegate 164 //----------------------------------------------------------------------------------- 165 166 @interface ImGuiExampleAppDelegate : NSObject <NSApplicationDelegate> 167 @property (nonatomic, readonly) NSWindow* window; 168 @end 169 170 @implementation ImGuiExampleAppDelegate 171 @synthesize window = _window; 172 173 -(BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)theApplication 174 { 175 return YES; 176 } 177 178 -(NSWindow*)window 179 { 180 if (_window != nil) 181 return (_window); 182 183 NSRect viewRect = NSMakeRect(100.0, 100.0, 100.0 + 1280.0, 100 + 720.0); 184 185 _window = [[NSWindow alloc] initWithContentRect:viewRect styleMask:NSWindowStyleMaskTitled|NSWindowStyleMaskMiniaturizable|NSWindowStyleMaskResizable|NSWindowStyleMaskClosable backing:NSBackingStoreBuffered defer:YES]; 186 [_window setTitle:@"Dear ImGui OSX+OpenGL2 Example"]; 187 [_window setAcceptsMouseMovedEvents:YES]; 188 [_window setOpaque:YES]; 189 [_window makeKeyAndOrderFront:NSApp]; 190 191 return (_window); 192 } 193 194 -(void)setupMenu 195 { 196 NSMenu* mainMenuBar = [[NSMenu alloc] init]; 197 NSMenu* appMenu; 198 NSMenuItem* menuItem; 199 200 appMenu = [[NSMenu alloc] initWithTitle:@"Dear ImGui OSX+OpenGL2 Example"]; 201 menuItem = [appMenu addItemWithTitle:@"Quit Dear ImGui OSX+OpenGL2 Example" action:@selector(terminate:) keyEquivalent:@"q"]; 202 [menuItem setKeyEquivalentModifierMask:NSEventModifierFlagCommand]; 203 204 menuItem = [[NSMenuItem alloc] init]; 205 [menuItem setSubmenu:appMenu]; 206 207 [mainMenuBar addItem:menuItem]; 208 209 appMenu = nil; 210 [NSApp setMainMenu:mainMenuBar]; 211 } 212 213 -(void)dealloc 214 { 215 _window = nil; 216 } 217 218 -(void)applicationDidFinishLaunching:(NSNotification *)aNotification 219 { 220 // Make the application a foreground application (else it won't receive keyboard events) 221 ProcessSerialNumber psn = {0, kCurrentProcess}; 222 TransformProcessType(&psn, kProcessTransformToForegroundApplication); 223 224 // Menu 225 [self setupMenu]; 226 227 NSOpenGLPixelFormatAttribute attrs[] = 228 { 229 NSOpenGLPFADoubleBuffer, 230 NSOpenGLPFADepthSize, 32, 231 0 232 }; 233 234 NSOpenGLPixelFormat* format = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs]; 235 ImGuiExampleView* view = [[ImGuiExampleView alloc] initWithFrame:self.window.frame pixelFormat:format]; 236 format = nil; 237 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1070 238 if (floor(NSAppKitVersionNumber) > NSAppKitVersionNumber10_6) 239 [view setWantsBestResolutionOpenGLSurface:YES]; 240 #endif // MAC_OS_X_VERSION_MAX_ALLOWED >= 1070 241 [self.window setContentView:view]; 242 243 if ([view openGLContext] == nil) 244 NSLog(@"No OpenGL Context!"); 245 246 // Setup Dear ImGui context 247 // FIXME: This example doesn't have proper cleanup... 248 IMGUI_CHECKVERSION(); 249 ImGui::CreateContext(); 250 ImGuiIO& io = ImGui::GetIO(); (void)io; 251 //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls 252 //io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls 253 254 // Setup Dear ImGui style 255 ImGui::StyleColorsDark(); 256 //ImGui::StyleColorsClassic(); 257 258 // Setup Platform/Renderer backends 259 ImGui_ImplOSX_Init(); 260 ImGui_ImplOpenGL2_Init(); 261 262 // Load Fonts 263 // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. 264 // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple. 265 // - If the file cannot be loaded, the function will return NULL. Please handle those errors in your application (e.g. use an assertion, or display an error and quit). 266 // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call. 267 // - Read 'docs/FONTS.txt' for more instructions and details. 268 // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ ! 269 //io.Fonts->AddFontDefault(); 270 //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f); 271 //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f); 272 //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f); 273 //io.Fonts->AddFontFromFileTTF("../../misc/fonts/ProggyTiny.ttf", 10.0f); 274 //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese()); 275 //IM_ASSERT(font != NULL); 276 } 277 278 @end 279 280 int main(int argc, const char* argv[]) 281 { 282 @autoreleasepool 283 { 284 NSApp = [NSApplication sharedApplication]; 285 ImGuiExampleAppDelegate* delegate = [[ImGuiExampleAppDelegate alloc] init]; 286 [[NSApplication sharedApplication] setDelegate:delegate]; 287 [NSApp run]; 288 } 289 return NSApplicationMain(argc, argv); 290 }