resizable_panel.h

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#ifndef COCKATRICE_RESIZABLE_PANEL_H
#define COCKATRICE_RESIZABLE_PANEL_H
 
#include "abstract_analytics_panel_widget.h"
 
#include <QApplication>
#include <QDrag>
#include <QFrame>
#include <QMimeData>
#include <QMouseEvent>
#include <QPushButton>
#include <QScrollArea>
#include <QScrollBar>
#include <QTimer>
#include <QVBoxLayout>
#include <QWidget>
 
class ResizablePanel : public QWidget
{
    Q_OBJECT
public:
    explicit ResizablePanel(const QString &typeId,
                            AbstractAnalyticsPanelWidget *analyticsPanel,
                            QWidget *parent = nullptr);
 
    void setSelected(bool selected);
    void setHeightFromSaved(int h);
    int getCurrentHeight() const;
 
    QSize sizeHint() const override;
    QSize minimumSizeHint() const override;
 
    QString getTypeId() const
    {
        return typeId;
    }
 
    AbstractAnalyticsPanelWidget *panel;
 
signals:
    void dragStarted(ResizablePanel *panel);
    void dropRequested(ResizablePanel *dragged, ResizablePanel *target, bool insertBefore);
 
protected:
    bool eventFilter(QObject *obj, QEvent *event) override;
    void dragEnterEvent(QDragEnterEvent *event) override;
    void dragMoveEvent(QDragMoveEvent *event) override;
    void dragLeaveEvent(QDragLeaveEvent *event) override;
    void dropEvent(QDropEvent *event) override;
    void resizeEvent(QResizeEvent *event) override;
 
private:
    int getMinimumAllowedHeight() const;
    void updateSizeConstraints();
    void startDrag();
    void performAutoScroll();
    void showDropIndicator(double y);
    void hideDropIndicator();
 
    QString typeId;
 
    QFrame *frame;
    QFrame *selectionOverlay;
    QFrame *dropIndicator;
    QPushButton *dragButton;
    QWidget *resizeHandle;
 
    int currentHeight;
    bool isResizing = false;
    bool isDraggingPanel = false;
    double resizeStartY = 0;
    int resizeStartHeight = 0;
 
    QPoint dragStartPos;
    QPoint lastDragPos;
    QTimer *autoScrollTimer;
};
 
#endif // COCKATRICE_RESIZABLE_PANEL_H