SubWindow.h

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/*
 * SubWindow.h - Implementation of QMdiSubWindow that correctly tracks
 *   the geometry that windows should be restored to.
 *   Workaround for https://bugreports.qt.io/browse/QTBUG-256
 *
 * Copyright (c) 2015 Colin Wallace <wallace.colin.a@gmail.com>
 *
 * This file is part of LMMS - https://lmms.io
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program (see COPYING); if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 */
 
#ifndef LMMS_GUI_SUBWINDOW_H
#define LMMS_GUI_SUBWINDOW_H
 
#include <QMdiSubWindow>
#include <QString>
 
#include "lmms_export.h"
 
class QGraphicsDropShadowEffect;
class QLabel;
class QPushButton;
class QWidget;
 
namespace lmms::gui
{
 

class LMMS_EXPORT SubWindow : public QMdiSubWindow
{
        Q_OBJECT
        Q_PROPERTY( QBrush activeColor READ activeColor WRITE setActiveColor )
        Q_PROPERTY( QColor textShadowColor READ textShadowColor WRITE setTextShadowColor )
        Q_PROPERTY( QColor borderColor READ borderColor WRITE setBorderColor )
 
public:
        SubWindow( QWidget *parent = nullptr, Qt::WindowFlags windowFlags = QFlag(0) );
        // same as QWidet::normalGeometry, but works properly under X11 (see https://bugreports.qt.io/browse/QTBUG-256)
        QRect getTrueNormalGeometry() const;
        QBrush activeColor() const;
        QColor textShadowColor() const;
        QColor borderColor() const;
        QMargins decorationMargins() const;
        void setActiveColor( const QBrush & b );
        void setTextShadowColor( const QColor &c );
        void setBorderColor( const QColor &c );
        int titleBarHeight() const;
        int frameWidth() const;
        bool isDetachable() const;
        void setDetachable(bool on);
        bool isDetached() const;
        void setDetached(bool on);
 
        // TODO Needed to update the title bar when replacing instruments.
        // Update works automatically if QMdiSubWindows are used.
        void updateTitleBar();
 
public slots:
        void detach();
        void attach();
        void setVisible(bool visible) override;
 
protected:
        // hook the QWidget move/resize events to update the tracked geometry
        void moveEvent(QMoveEvent* event) override;
        void resizeEvent(QResizeEvent* event) override;
        void paintEvent(QPaintEvent* pe) override;
        void changeEvent(QEvent* event) override;
        void showEvent(QShowEvent* e) override;
        bool eventFilter(QObject* obj, QEvent* event) override;
 
signals:
        void focusLost();
 
private:
        const QSize m_buttonSize;
        const int m_titleBarHeight;
        QPushButton * m_closeBtn;
        QPushButton * m_maximizeBtn;
        QPushButton * m_restoreBtn;
        QPushButton* m_detachBtn;
        QBrush m_activeColor;
        QColor m_textShadowColor;
        QColor m_borderColor;
        QPoint m_position;
        QRect m_trackedNormalGeom;
        QLabel * m_windowTitle;
        QGraphicsDropShadowEffect * m_shadow;
        bool m_hasFocus;
        bool m_isDetachable;
 
        static void elideText( QLabel *label, QString text );
        void adjustTitleBar();
 
private slots:
        void focusChanged( QMdiSubWindow * subWindow );
};
 
 
 
} // namespace lmms::gui
 
#endif // LMMS_GUI_SUBWINDOW_H