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[Qt] Initial Imgui integration

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wheremyfoodat 2024-01-28 22:27:30 +02:00
parent 8ff2d7f9b2
commit 918645479a
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390
third_party/imgui/examples/example_apple_metal/main.mm vendored
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@ -1,6 +1,10 @@
// Dear ImGui: standalone example application for OSX + Metal.
// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
// Read online: https://github.com/ocornut/imgui/tree/master/docs
// Learn about Dear ImGui:
// - FAQ https://dearimgui.com/faq
// - Getting Started https://dearimgui.com/getting-started
// - Documentation https://dearimgui.com/docs (same as your local docs/ folder).
// - Introduction, links and more at the top of imgui.cpp
#import <Foundation/Foundation.h>
@ -15,26 +19,28 @@
#include "imgui.h"
#include "imgui_impl_metal.h"
#if TARGET_OS_OSX
#include "imgui_impl_osx.h"
@interface ViewController : NSViewController
@interface AppViewController : NSViewController<NSWindowDelegate>
@end
#else
@interface ViewController : UIViewController
@interface AppViewController : UIViewController
@end
#endif
@interface ViewController () <MTKViewDelegate>
@interface AppViewController () <MTKViewDelegate>
@property (nonatomic, readonly) MTKView *mtkView;
@property (nonatomic, strong) id <MTLDevice> device;
@property (nonatomic, strong) id <MTLCommandQueue> commandQueue;
@end
@implementation ViewController
//-----------------------------------------------------------------------------------
// AppViewController
//-----------------------------------------------------------------------------------
- (instancetype)initWithNibName:(nullable NSString *)nibNameOrNil bundle:(nullable NSBundle *)nibBundleOrNil
@implementation AppViewController
-(instancetype)initWithNibName:(nullable NSString *)nibNameOrNil bundle:(nullable NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
@ -52,12 +58,22 @@
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
//io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
//io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls
io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls
io.ConfigFlags |= ImGuiConfigFlags_DockingEnable; // Enable Docking
io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable; // Enable Multi-Viewport / Platform Windows
// Setup Dear ImGui style
ImGui::StyleColorsDark();
//ImGui::StyleColorsClassic();
//ImGui::StyleColorsLight();
// When viewports are enabled we tweak WindowRounding/WindowBg so platform windows can look identical to regular ones.
ImGuiStyle& style = ImGui::GetStyle();
if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
{
style.WindowRounding = 0.0f;
style.Colors[ImGuiCol_WindowBg].w = 1.0f;
}
// Setup Renderer backend
ImGui_ImplMetal_Init(_device);
@ -65,32 +81,33 @@
// Load Fonts
// - 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.
// - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
// - 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).
// - If the file cannot be loaded, the function will return a nullptr. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
// - 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.
// - Read 'docs/FONTS.txt' for more instructions and details.
// - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
// - Read 'docs/FONTS.md' for more instructions and details.
// - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
//io.Fonts->AddFontDefault();
//io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/ProggyTiny.ttf", 10.0f);
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != nullptr);
return self;
}
- (MTKView *)mtkView
-(MTKView *)mtkView
{
return (MTKView *)self.view;
}
- (void)loadView
-(void)loadView
{
self.view = [[MTKView alloc] initWithFrame:CGRectMake(0, 0, 1200, 720)];
}
- (void)viewDidLoad
-(void)viewDidLoad
{
[super viewDidLoad];
@ -98,129 +115,12 @@
self.mtkView.delegate = self;
#if TARGET_OS_OSX
// Add a tracking area in order to receive mouse events whenever the mouse is within the bounds of our view
NSTrackingArea *trackingArea = [[NSTrackingArea alloc] initWithRect:NSZeroRect
options:NSTrackingMouseMoved | NSTrackingInVisibleRect | NSTrackingActiveAlways
owner:self
userInfo:nil];
[self.view addTrackingArea:trackingArea];
// If we want to receive key events, we either need to be in the responder chain of the key view,
// or else we can install a local monitor. The consequence of this heavy-handed approach is that
// we receive events for all controls, not just Dear ImGui widgets. If we had native controls in our
// window, we'd want to be much more careful than just ingesting the complete event stream.
// To match the behavior of other backends, we pass every event down to the OS.
NSEventMask eventMask = NSEventMaskKeyDown | NSEventMaskKeyUp | NSEventMaskFlagsChanged | NSEventTypeScrollWheel;
[NSEvent addLocalMonitorForEventsMatchingMask:eventMask handler:^NSEvent * _Nullable(NSEvent *event)
{
ImGui_ImplOSX_HandleEvent(event, self.view);
return event;
}];
ImGui_ImplOSX_Init();
ImGui_ImplOSX_Init(self.view);
[NSApp activateIgnoringOtherApps:YES];
#endif
}
#pragma mark - Interaction
#if TARGET_OS_OSX
- (void)mouseMoved:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)mouseDown:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)rightMouseDown:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)otherMouseDown:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)mouseUp:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)rightMouseUp:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)otherMouseUp:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)mouseDragged:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)rightMouseDragged:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)otherMouseDragged:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
- (void)scrollWheel:(NSEvent *)event {
ImGui_ImplOSX_HandleEvent(event, self.view);
}
#else
// This touch mapping is super cheesy/hacky. We treat any touch on the screen
// as if it were a depressed left mouse button, and we don't bother handling
// multitouch correctly at all. This causes the "cursor" to behave very erratically
// when there are multiple active touches. But for demo purposes, single-touch
// interaction actually works surprisingly well.
- (void)updateIOWithTouchEvent:(UIEvent *)event
{
UITouch *anyTouch = event.allTouches.anyObject;
CGPoint touchLocation = [anyTouch locationInView:self.view];
ImGuiIO &io = ImGui::GetIO();
io.MousePos = ImVec2(touchLocation.x, touchLocation.y);
BOOL hasActiveTouch = NO;
for (UITouch *touch in event.allTouches)
{
if (touch.phase != UITouchPhaseEnded && touch.phase != UITouchPhaseCancelled)
{
hasActiveTouch = YES;
break;
}
}
io.MouseDown[0] = hasActiveTouch;
}
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[self updateIOWithTouchEvent:event];
}
- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[self updateIOWithTouchEvent:event];
}
- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[self updateIOWithTouchEvent:event];
}
- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[self updateIOWithTouchEvent:event];
}
#endif
#pragma mark - MTKViewDelegate
- (void)drawInMTKView:(MTKView*)view
-(void)drawInMTKView:(MTKView*)view
{
ImGuiIO& io = ImGui::GetIO();
io.DisplaySize.x = view.bounds.size.width;
@ -233,90 +133,149 @@
#endif
io.DisplayFramebufferScale = ImVec2(framebufferScale, framebufferScale);
io.DeltaTime = 1 / float(view.preferredFramesPerSecond ?: 60);
id<MTLCommandBuffer> commandBuffer = [self.commandQueue commandBuffer];
MTLRenderPassDescriptor* renderPassDescriptor = view.currentRenderPassDescriptor;
if (renderPassDescriptor == nil)
{
[commandBuffer commit];
return;
}
// Start the Dear ImGui frame
ImGui_ImplMetal_NewFrame(renderPassDescriptor);
#if TARGET_OS_OSX
ImGui_ImplOSX_NewFrame(view);
#endif
ImGui::NewFrame();
// Our state (make them static = more or less global) as a convenience to keep the example terse.
static bool show_demo_window = true;
static bool show_another_window = false;
static float clear_color[4] = { 0.28f, 0.36f, 0.5f, 1.0f };
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
MTLRenderPassDescriptor* renderPassDescriptor = view.currentRenderPassDescriptor;
if (renderPassDescriptor != nil)
// 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!).
if (show_demo_window)
ImGui::ShowDemoWindow(&show_demo_window);
// 2. Show a simple window that we create ourselves. We use a Begin/End pair to create a named window.
{
renderPassDescriptor.colorAttachments[0].clearColor = MTLClearColorMake(clear_color[0] * clear_color[3], clear_color[1] * clear_color[3], clear_color[2] * clear_color[3], clear_color[3]);
static float f = 0.0f;
static int counter = 0;
// Here, you could do additional rendering work, including other passes as necessary.
ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it.
id <MTLRenderCommandEncoder> renderEncoder = [commandBuffer renderCommandEncoderWithDescriptor:renderPassDescriptor];
[renderEncoder pushDebugGroup:@"ImGui demo"];
ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too)
ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state
ImGui::Checkbox("Another Window", &show_another_window);
// Start the Dear ImGui frame
ImGui_ImplMetal_NewFrame(renderPassDescriptor);
#if TARGET_OS_OSX
ImGui_ImplOSX_NewFrame(view);
#endif
ImGui::NewFrame();
ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f
ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
// 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!).
if (show_demo_window)
ImGui::ShowDemoWindow(&show_demo_window);
if (ImGui::Button("Button")) // Buttons return true when clicked (most widgets return true when edited/activated)
counter++;
ImGui::SameLine();
ImGui::Text("counter = %d", counter);
// 2. Show a simple window that we create ourselves. We use a Begin/End pair to created a named window.
{
static float f = 0.0f;
static int counter = 0;
ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it.
ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too)
ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state
ImGui::Checkbox("Another Window", &show_another_window);
ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f
ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
if (ImGui::Button("Button")) // Buttons return true when clicked (most widgets return true when edited/activated)
counter++;
ImGui::SameLine();
ImGui::Text("counter = %d", counter);
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
ImGui::End();
}
// 3. Show another simple window.
if (show_another_window)
{
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)
ImGui::Text("Hello from another window!");
if (ImGui::Button("Close Me"))
show_another_window = false;
ImGui::End();
}
// Rendering
ImGui::Render();
ImDrawData* draw_data = ImGui::GetDrawData();
ImGui_ImplMetal_RenderDrawData(draw_data, commandBuffer, renderEncoder);
[renderEncoder popDebugGroup];
[renderEncoder endEncoding];
[commandBuffer presentDrawable:view.currentDrawable];
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / io.Framerate, io.Framerate);
ImGui::End();
}
// 3. Show another simple window.
if (show_another_window)
{
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)
ImGui::Text("Hello from another window!");
if (ImGui::Button("Close Me"))
show_another_window = false;
ImGui::End();
}
// Rendering
ImGui::Render();
ImDrawData* draw_data = ImGui::GetDrawData();
renderPassDescriptor.colorAttachments[0].clearColor = MTLClearColorMake(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w);
id <MTLRenderCommandEncoder> renderEncoder = [commandBuffer renderCommandEncoderWithDescriptor:renderPassDescriptor];
[renderEncoder pushDebugGroup:@"Dear ImGui rendering"];
ImGui_ImplMetal_RenderDrawData(draw_data, commandBuffer, renderEncoder);
[renderEncoder popDebugGroup];
[renderEncoder endEncoding];
// Present
[commandBuffer presentDrawable:view.currentDrawable];
[commandBuffer commit];
// Update and Render additional Platform Windows
if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
{
ImGui::UpdatePlatformWindows();
ImGui::RenderPlatformWindowsDefault();
}
}
- (void)mtkView:(MTKView*)view drawableSizeWillChange:(CGSize)size
-(void)mtkView:(MTKView*)view drawableSizeWillChange:(CGSize)size
{
}
//-----------------------------------------------------------------------------------
// Input processing
//-----------------------------------------------------------------------------------
#if TARGET_OS_OSX
- (void)viewWillAppear
{
[super viewWillAppear];
self.view.window.delegate = self;
}
- (void)windowWillClose:(NSNotification *)notification
{
ImGui_ImplMetal_Shutdown();
ImGui_ImplOSX_Shutdown();
ImGui::DestroyContext();
}
#else
// This touch mapping is super cheesy/hacky. We treat any touch on the screen
// as if it were a depressed left mouse button, and we don't bother handling
// multitouch correctly at all. This causes the "cursor" to behave very erratically
// when there are multiple active touches. But for demo purposes, single-touch
// interaction actually works surprisingly well.
-(void)updateIOWithTouchEvent:(UIEvent *)event
{
UITouch *anyTouch = event.allTouches.anyObject;
CGPoint touchLocation = [anyTouch locationInView:self.view];
ImGuiIO &io = ImGui::GetIO();
io.AddMouseSourceEvent(ImGuiMouseSource_TouchScreen);
io.AddMousePosEvent(touchLocation.x, touchLocation.y);
BOOL hasActiveTouch = NO;
for (UITouch *touch in event.allTouches)
{
if (touch.phase != UITouchPhaseEnded && touch.phase != UITouchPhaseCancelled)
{
hasActiveTouch = YES;
break;
}
}
io.AddMouseButtonEvent(0, hasActiveTouch);
}
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { [self updateIOWithTouchEvent:event]; }
-(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { [self updateIOWithTouchEvent:event]; }
-(void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { [self updateIOWithTouchEvent:event]; }
-(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { [self updateIOWithTouchEvent:event]; }
#endif
@end
#pragma mark - Application Delegate
//-----------------------------------------------------------------------------------
// AppDelegate
//-----------------------------------------------------------------------------------
#if TARGET_OS_OSX
@ -326,28 +285,27 @@
@implementation AppDelegate
- (instancetype)init
-(BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender
{
return YES;
}
-(instancetype)init
{
if (self = [super init])
{
NSViewController *rootViewController = [[ViewController alloc] initWithNibName:nil bundle:nil];
NSViewController *rootViewController = [[AppViewController alloc] initWithNibName:nil bundle:nil];
self.window = [[NSWindow alloc] initWithContentRect:NSZeroRect
styleMask:NSWindowStyleMaskTitled | NSWindowStyleMaskClosable | NSWindowStyleMaskResizable | NSWindowStyleMaskMiniaturizable
backing:NSBackingStoreBuffered
defer:NO];
self.window.contentViewController = rootViewController;
[self.window orderFront:self];
[self.window center];
[self.window becomeKeyWindow];
[self.window makeKeyAndOrderFront:self];
}
return self;
}
- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender
{
return YES;
}
@end
#else
@ -358,10 +316,10 @@
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application
-(BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary<UIApplicationLaunchOptionsKey,id> *)launchOptions
{
UIViewController *rootViewController = [[ViewController alloc] init];
UIViewController *rootViewController = [[AppViewController alloc] init];
self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];
self.window.rootViewController = rootViewController;
[self.window makeKeyAndVisible];
@ -372,7 +330,9 @@
#endif
#pragma mark - main()
//-----------------------------------------------------------------------------------
// Application main() function
//-----------------------------------------------------------------------------------
#if TARGET_OS_OSX