// panelwidget.h - the front panel of the AdvancedController: the same buttons with the same
// icons as the real device, drawn as vectors. A click on a button sends the "KEY" command the
// physical button generates; the led of every button mirrors the real led of the device.
// Hold a button for 1.5 s to get the "long press" where the device has one (ENTER -> camera
// OSD menu, crosshair 1 / 2 -> edit mode).

#ifndef PANELWIDGET_H
#define PANELWIDGET_H

#include <QElapsedTimer>
#include <QHash>
#include <QString>
#include <QWidget>

class PanelWidget : public QWidget
{
    Q_OBJECT

public:
    static constexpr int LongPressMs = 1500;     // hold time for the long press (as in the firmware)

    explicit PanelWidget(QWidget *parent = nullptr);

    void setLeds(quint32 mask);                   // bit order = AdvCtrl::RemoteClient::LedNames
    void setInteractive(bool on);                 // presses count only while the controller is connected

    // A button pressed / released by the mouse or the PC keyboard.
    void press(const QString &button);
    void release(const QString &button);

signals:
    void keyPressed(const QString &key);          // name for "KEY", e.g. "ENTER" or "LONGENTER"

protected:
    void paintEvent(QPaintEvent *event) override;
    void mousePressEvent(QMouseEvent *event) override;
    void mouseReleaseEvent(QMouseEvent *event) override;

private:
    struct Geometry
    {
        double scale;    // pixels per unit (1 unit = distance between button centres)
        double ox;       // top left corner of the panel
        double oy;
    };

    Geometry geometry() const;
    QString buttonAt(const QPointF &pos) const;

    quint32 m_mask = 0;
    bool m_interactive = false;
    QHash<QString, QElapsedTimer> m_pressed;      // buttons held down and since when
    QString m_mouseButton;                        // button under the mouse press
};

#endif // PANELWIDGET_H