core/kgllib/glwidget.h

/*
 * Copyright (C) 2008 Rivo Laks <rivolaks@hot.ee>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either 
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef KGLLIB_GLWIDGET_H
#define KGLLIB_GLWIDGET_H


#include "kgllib.h"
#include <QtOpenGL/QGLWidget>
#include <QtCore/QList>

#include <Eigen/Core>

class QAction;


namespace KGLLib
{
class Camera;
class FPSCounter;
class TextRenderer;

class KGLLIB_EXPORT GLWidget : public QGLWidget
{
Q_OBJECT
public:
    EIGEN_MAKE_ALIGNED_OPERATOR_NEW

    explicit GLWidget(QWidget* parent = 0, const QGLWidget* shareWidget = 0, Qt::WindowFlags f = 0);
    explicit GLWidget(QGLContext* context, QWidget* parent = 0, const QGLWidget* shareWidget = 0, Qt::WindowFlags f = 0);
    explicit GLWidget(const QGLFormat& format, QWidget* parent = 0, const QGLWidget* shareWidget = 0, Qt::WindowFlags f = 0);

    virtual ~GLWidget();

    KGLLib::Camera* camera() const  { return mCamera; }
    KGLLib::FPSCounter* fpsCounter() const  { return mFpsCounter; }

    KGLLib::TextRenderer* textRenderer() const;

    bool glInitialized() const  { return mGLInitialized; }

public Q_SLOTS:
    void toggleShowFps();
    void toggleWireframeMode();

protected:
    virtual void initializeGL();
    virtual void initializeGL(Renderer* r);
    virtual void resizeGL(int width, int height);
    virtual void paintGL();
    virtual void render();

    void setClearColor(const Eigen::Vector4f& c);
    void setAutomaticClear(bool clear);

    Eigen::Vector4f clearColor() const  { return mClearColor; }
    bool automaticClear() const  { return mAutomaticClear; }

    void setErrorText(const QString& text);
    QString errorText() const  { return mErrorText; }

    bool shortcutsEnabled() const  { return mShortcutsEnabled; }
    virtual void setShortcutsEnabled( bool enabled);

private:
    void init();

private:
    KGLLib::Camera* mCamera;
    KGLLib::FPSCounter* mFpsCounter;
    mutable KGLLib::TextRenderer* mTextRenderer;

    bool mAutomaticClear;
    Eigen::Vector4f mClearColor;
    bool mGLInitialized;

    bool mShowFps;
    bool mWireframeMode;
    QString mErrorText;
    // We use our own list of actions here because we want to be able to
    //  enable/disable only those actions
    QList<QAction*> mShortcuts;
    bool mShortcutsEnabled;
};

}

#endif