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#pragma once
#include <QOpenGLFunctions>
#include <QOpenGLFunctions_3_2_Core>
#include <QObject>
#include <QPoint>
#include <imgui.h>
#include <memory>
class QMouseEvent;
class QWheelEvent;
class QKeyEvent;
namespace QtImGui {
class WindowWrapper {
public:
virtual ~WindowWrapper() {}
virtual void installEventFilter(QObject *object) = 0;
virtual QSize size() const = 0;
virtual qreal devicePixelRatio() const = 0;
virtual bool isActive() const = 0;
virtual QPoint mapFromGlobal(const QPoint &p) const = 0;
};
class ImGuiRenderer : public QObject, QOpenGLFunctions {
Q_OBJECT
public:
void initialize(WindowWrapper *window);
void newFrame();
bool eventFilter(QObject *watched, QEvent *event);
static ImGuiRenderer *instance();
private:
ImGuiRenderer() {}
void onMousePressedChange(QMouseEvent *event);
void onWheel(QWheelEvent *event);
void onKeyPressRelease(QKeyEvent *event);
void renderDrawList(ImDrawData *draw_data);
bool createFontsTexture();
bool createDeviceObjects();
std::unique_ptr<WindowWrapper> m_window;
double g_Time = 0.0f;
bool g_MousePressed[3] = { false, false, false };
float g_MouseWheel;
float g_MouseWheelH;
GLuint g_FontTexture = 0;
int g_ShaderHandle = 0, g_VertHandle = 0, g_FragHandle = 0;
int g_AttribLocationTex = 0, g_AttribLocationProjMtx = 0;
int g_AttribLocationPosition = 0, g_AttribLocationUV = 0, g_AttribLocationColor = 0;
unsigned int g_VboHandle = 0, g_VaoHandle = 0, g_ElementsHandle = 0;
QOpenGLFunctions_3_2_Core *g_fun = nullptr;
};
}
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