GUIButton.h

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#ifndef _CGUIBUTTON_
#define _CGUIBUTTON_

#include "GUIElement.h"

template<class T>
class CGUIButton : public CGUIElement {

public:
        CGUIButton();
        CGUIButton(T* _instance);

        void render();

        void update();

        void mouseButtons(int button, int state, int x, int y);

        // callbacks

        void setMouseUpCallback(void(T::*_func)(void)) {
                m_mouseUpCallback = _func;
        }

        void setMouseDownCallback(void(T::*_func)(void)) {
                m_mouseDownCallback = _func;
        }

        void setCallbackClass(T* _instance) {
                m_instance = _instance;
        }

        void setCallback(T* _instance, void(T::*_funcMouseDown)(void),
                        void(T::*_funcMouseUp)(void)) {
                m_instance = _instance;
                m_mouseDownCallback = _funcMouseDown;
                m_mouseUpCallback = _funcMouseUp;
        }

protected:

        T* m_instance;

        void (T::*m_mouseUpCallback)(void);
        void (T::*m_mouseDownCallback)(void);

};

template<class T>
CGUIButton<T>::CGUIButton() {
        m_instance = NULL;

        m_mouseUpCallback = NULL;
        m_mouseDownCallback = NULL;

        this->setBackgroundColor(0,0,0,0);
        this->setBackgroundHoverColor(0,0,0,0);
        this->setTextColor(255, 255, 255, 255);
        this->setTextHoverColor(100, 100, 100, 255);
}

template<class T>
CGUIButton<T>::CGUIButton(T* _instance) {
        m_instance = _instance;
        m_mouseUpCallback = NULL;
        m_mouseDownCallback = NULL;

        this->setBackgroundColor(0,0,0,0);
        this->setBackgroundHoverColor(0,0,0,0);
        this->setTextColor(255, 255, 255, 255);
        this->setTextHoverColor(200, 200, 200, 255);

}

template<class T>
void CGUIButton<T>::render() {

        glPushMatrix();

        glTranslatef(getPositionX(), getPositionY(), 0);

        Color4f backgroundColor = this->getCurrentBackgroundColor();

        glColor4f(backgroundColor.r, backgroundColor.g, backgroundColor.b,
                        backgroundColor.alpha);

        glBegin(GL_QUADS);
        glVertex2f(0, 0);
        glVertex2f(getWidth(), 0);
        glVertex2f(getWidth(), getHeight());
        glVertex2f(0, getHeight());
        glEnd();

        glPopMatrix();

        CFontPrinter::getInstance()->print(getFontId(), getPositionX(),
                        getPositionY(), this->getCurrentTextColor(), this->getString());

}

template<class T>
void CGUIButton<T>::mouseButtons(int button, int state, int x, int y) {

        if (this->isHover()) {
                if (m_instance != NULL) {
                        if (state == GLUT_UP && this->m_mouseUpCallback != NULL) {
                                (this->m_instance->*m_mouseUpCallback)();

                        } else if (state == GLUT_DOWN && this->m_mouseDownCallback != NULL) {
                                (this->m_instance->*m_mouseDownCallback)();
                        }
                }
        }

}

template<class T>
void CGUIButton<T>::update() {

}

#endif

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