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#pragma once
#include <QWidget>
#include <memory>
#include "RegionCache.h"
#include "ChunkSource.h"
class BiomeView :
public QWidget
{
typedef QWidget super;
Q_OBJECT
public:
explicit BiomeView(QWidget * parent = NULL);
QSize minimumSizeHint() const;
QSize sizeHint() const;
/** Replaces the chunk source used by the biome view to get the chunk biome data.
The entire view is then invalidated and regenerated. */
void setChunkSource(std::shared_ptr<ChunkSource> a_ChunkSource);
/** Sets the position of the central pixel of the map to the specified point and redraws the view. */
void setPosition(int a_BlockX, int a_BlockZ);
/** Sets the zoom level to the specified value and redraws the view. */
void setZoomLevel(double a_ZoomLevel);
signals:
/** Signalled when the user uses the wheel to scroll upwards. */
void wheelUp();
/** Signalled when the user uses the wheel to scroll downwards. */
void wheelDown();
/** Signalled when the user presses a key to increase zoom. */
void increaseZoom();
/** Signalled when the user presses a key to decrease zoom. */
void decreaseZoom();
/** Emitted when the user moves the mouse, to reflect the current block under the cursor. */
void hoverChanged(int a_BlockX, int a_BlockZ, int a_Biome);
public slots:
/** Redraw the entire widget area. */
void redraw();
/** A specified region has become available, redraw it. */
void regionAvailable(int a_RegionX, int a_RegionZ);
/** Reloads the current chunk source and redraws the entire workspace. */
void reload();
protected:
double m_X, m_Z;
double m_Zoom;
/** Cache for the loaded chunk data. */
RegionCache m_Cache;
/** The entire view's contents in an offscreen image. */
QImage m_Image;
/** Coords of the mouse for the previous position, used while dragging. */
int m_LastX, m_LastY;
/** Set to true when the user has a mouse button depressed, and is dragging the view. */
bool m_IsMouseDragging;
/** Accumulator for the mouse wheel's delta. When the accumulator hits a threshold, the view zooms. */
int m_MouseWheelDelta;
/** Data used for rendering a chunk that hasn't been loaded yet */
uchar m_EmptyChunkImage[16 * 16 * 4];
/** Data placeholder for chunks that aren't valid. */
short m_EmptyChunkBiomes[16 * 16];
/** Draws the specified chunk into m_Image */
void drawChunk(int a_ChunkX, int a_ChunkZ);
/** Returns true iff the biome view has been initialized to contain proper biome data. */
bool hasData(void) const { return m_Cache.hasData(); }
/** Called when the widget is resized */
virtual void resizeEvent(QResizeEvent *) override;
/** Paints the entire widget */
virtual void paintEvent(QPaintEvent *) override;
/** Called when the user presses any mouse button. */
virtual void mousePressEvent(QMouseEvent * a_Event);
/** Called when the user moves the mouse. */
virtual void mouseMoveEvent(QMouseEvent * a_Event);
/** Called when the user releases a previously held mouse button. */
virtual void mouseReleaseEvent(QMouseEvent * a_Event) override;
/** Called when the user rotates the mouse wheel. */
virtual void wheelEvent(QWheelEvent * a_Event) override;
/** Called when the user presses a key. */
virtual void keyPressEvent(QKeyEvent * a_Event) override;
};
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