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#include <QtImGui.h>
#include <imgui.h>
#include <QApplication>
#include <QTimer>
#include <QSurfaceFormat>
#include <QOpenGLWidget>
#include <QOpenGLExtraFunctions>
class DemoWindow : public QOpenGLWidget, private QOpenGLExtraFunctions
{
protected:
void initializeGL() override
{
initializeOpenGLFunctions();
QtImGui::initialize(this);
}
void paintGL() override
{
QtImGui::newFrame();
// 1. Show a simple window
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
{
static float f = 0.0f;
ImGui::Text("Hello, world!");
ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
ImGui::ColorEdit3("clear color", (float*)&clear_color);
if (ImGui::Button("Test Window")) show_test_window ^= 1;
if (ImGui::Button("Another Window")) show_another_window ^= 1;
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
}
// 2. Show another simple window, this time using an explicit Begin/End pair
if (show_another_window)
{
ImGui::SetNextWindowSize(ImVec2(200,100), ImGuiSetCond_FirstUseEver);
ImGui::Begin("Another Window", &show_another_window);
ImGui::Text("Hello");
ImGui::End();
}
// 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
if (show_test_window)
{
ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCond_FirstUseEver);
ImGui::ShowTestWindow();
}
// Do render before ImGui UI is rendered
glViewport(0, 0, width(), height());
glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
glClear(GL_COLOR_BUFFER_BIT);
ImGui::Render();
}
private:
bool show_test_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImColor(114, 144, 154);
};
int main(int argc, char *argv[])
{
// Use OpenGL 3 Core Profile
QSurfaceFormat glFormat;
glFormat.setVersion(3, 3);
glFormat.setProfile(QSurfaceFormat::CoreProfile);
QSurfaceFormat::setDefaultFormat(glFormat);
QApplication a(argc, argv);
// Show window
DemoWindow w;
w.setWindowTitle("QtImGui widget example");
w.resize(1280, 720);
w.show();
// Update at 60 fps
QTimer timer;
QObject::connect(&timer, SIGNAL(timeout()), &w, SLOT(update()));
timer.start(16);
return a.exec();
}
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