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/*
* Copyright 2013 Thomas Schöps
*
* This file is part of OpenOrienteering.
*
* OpenOrienteering 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 3 of the License, or
* (at your option) any later version.
*
* OpenOrienteering 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 OpenOrienteering. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _OPENORIENTEERING_TOUCH_CURSOR_H_
#define _OPENORIENTEERING_TOUCH_CURSOR_H_
#include "core/map_coord.h"
QT_BEGIN_NAMESPACE
class QMouseEvent;
class QPainter;
QT_END_NAMESPACE
class MapWidget;
/**
* Handles drawing and controlling a helper cursor inside the map widget for the mobile UI.
*/
class TouchCursor
{
public:
/** List of IDs for controls attached to the cursor. */
enum ControlID
{
LeftButton = 0,
NoButton
};
/** Constructs a touch cursor for a map widget. */
TouchCursor(MapWidget* map_widget);
/**
* Notifies the cursor of the event, possibly modifying it.
* Attention: the event type may be changed to a mouse move event.
*/
void mousePressEvent(QMouseEvent* event);
/**
* Notifies the cursor of the event, possibly modifying it.
* Returns true if the map widget should further process event.
*/
bool mouseMoveEvent(QMouseEvent* event);
/**
* Notifies the cursor of the event, possibly modifying it.
* Returns true if the map widget should further process event.
*/
bool mouseReleaseEvent(QMouseEvent* event);
/**
* Notifies the cursor of the event, possibly modifying it.
* Returns true if the map widget should further process event.
*/
bool mouseDoubleClickEvent(QMouseEvent* event);
/** Paints the cursor. */
void paint(QPainter* painter);
/** Issues a (delayed) redraw of the cursor. */
void updateMapWidget(bool delayed);
private:
/**
* Checks if a touch at pos is inside a control. If yes, returns true and
* sets out_id to the ID of the touched control.
*/
bool touchedControl(QPoint pos, ControlID* out_id);
/** Returns the touch point offset from the cursor in pixels. */
float touchPosOffsetPx() const;
/** Returns the radius of the control ring in pixels */
float controlRingRadiusPx() const;
float controlRingStrokeRadiusPx() const;
float standardCursorRadiusPx() const;
bool visible;
bool left_button_pressed;
bool first_move_event_received;
ControlID last_pressed_button;
MapCoordF cursor_coord;
QPointF last_cursor_pos;
QPoint last_touch_pos;
MapWidget* map_widget;
};
#endif
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