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

    // TODO: @param event
    void moveEvent(QMoveEvent* event) override;

    // TODO: @param event
    void resizeEvent(QResizeEvent* event) override;

    void paintEvent(QPaintEvent* pe) override;

    // TODO: @param event
    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