4 files changed, 169 insertions, 59 deletions

diff --git a/Tools/QtBiomeVisualiser/BiomeView.cpp b/Tools/QtBiomeVisualiser/BiomeView.cpp
index ce5a870cd..8d53c8626 100644
--- a/Tools/QtBiomeVisualiser/BiomeView.cpp
+++ b/Tools/QtBiomeVisualiser/BiomeView.cpp
@@ -80,6 +80,27 @@ void BiomeView::setChunkSource(std::shared_ptr<ChunkSource> a_ChunkSource)
 
 
 
+void BiomeView::setPosition(int a_BlockX, int a_BlockZ)
+{
+	m_X = a_BlockX;
+	m_Z = a_BlockZ;
+	redraw();
+}
+
+
+
+
+
+void BiomeView::setZoomLevel(double a_ZoomLevel)
+{
+	m_Zoom = a_ZoomLevel;
+	redraw();
+}
+
+
+
+
+
 void BiomeView::redraw()
 {
 	if (!hasData())
@@ -307,12 +328,12 @@ void BiomeView::wheelEvent(QWheelEvent * a_Event)
 	m_MouseWheelDelta += a_Event->delta();
 	while (m_MouseWheelDelta >= DELTA_STEP)
 	{
-		increaseZoom();
+		emit wheelUp();
 		m_MouseWheelDelta -= DELTA_STEP;
 	}
 	while (m_MouseWheelDelta <= -DELTA_STEP)
 	{
-		decreaseZoom();
+		emit wheelDown();
 		m_MouseWheelDelta += DELTA_STEP;
 	}
 }
@@ -360,14 +381,14 @@ void BiomeView::keyPressEvent(QKeyEvent * a_Event)
 		case Qt::Key_PageUp:
 		case Qt::Key_Q:
 		{
-			increaseZoom();
+			emit increaseZoom();
 			break;
 		}
 
 		case Qt::Key_PageDown:
 		case Qt::Key_E:
 		{
-			decreaseZoom();
+			emit decreaseZoom();
 			break;
 		}
 	}
@@ -376,52 +397,3 @@ void BiomeView::keyPressEvent(QKeyEvent * a_Event)
 
 
 
-
-void BiomeView::decreaseZoom()
-{
-	if (m_Zoom > 1.001)
-	{
-		m_Zoom--;
-		if (m_Zoom < 1.0)
-		{
-			// Just crossed the 100%, fixate the 100% threshold:
-			m_Zoom = 1.0;
-		}
-	}
-	else if (m_Zoom > 0.01)
-	{
-		m_Zoom = m_Zoom / 2;
-	}
-	redraw();
-}
-
-
-
-
-
-void BiomeView::increaseZoom()
-{
-	if (m_Zoom > 0.99)
-	{
-		if (m_Zoom > 20.0)
-		{
-			// Zoom too large
-			return;
-		}
-		m_Zoom++;
-	}
-	else
-	{
-		m_Zoom = m_Zoom * 2;
-		if (m_Zoom > 1.0)
-		{
-			// Just crossed the 100%, fixate the 100% threshold:
-			m_Zoom = 1.0;
-		}
-	}
-	redraw();
-}
-
-
-
-
diff --git a/Tools/QtBiomeVisualiser/BiomeView.h b/Tools/QtBiomeVisualiser/BiomeView.h
index f0521571d..ae5dd2338 100644
--- a/Tools/QtBiomeVisualiser/BiomeView.h
+++ b/Tools/QtBiomeVisualiser/BiomeView.h
@@ -25,7 +25,24 @@ public:
 	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();
 
 public slots:
 	/** Redraw the entire widget area. */
@@ -86,12 +103,6 @@ protected:
 
 	/** Called when the user presses a key. */
 	virtual void keyPressEvent(QKeyEvent * a_Event) override;
-
-	/** Decreases the zoom level and queues a redraw. */
-	void decreaseZoom();
-
-	/** Increases the zoom level and queues a redraw. */
-	void increaseZoom();
 };
 
 
diff --git a/Tools/QtBiomeVisualiser/MainWindow.cpp b/Tools/QtBiomeVisualiser/MainWindow.cpp
index eb45690c1..25a88d442 100644
--- a/Tools/QtBiomeVisualiser/MainWindow.cpp
+++ b/Tools/QtBiomeVisualiser/MainWindow.cpp
@@ -18,6 +18,15 @@
 
 
 
+const double MainWindow::m_ViewZooms[] =
+{
+	0.0625, 0.125, 0.25, 0.5, 1, 2, 4, 8, 16, 24,
+};
+
+
+
+
+
 MainWindow::MainWindow(QWidget * parent) :
 	QMainWindow(parent),
 	m_GeneratorSetup(nullptr),
@@ -26,6 +35,11 @@ MainWindow::MainWindow(QWidget * parent) :
 	initMinecraftPath();
 
 	m_BiomeView = new BiomeView();
+	connect(m_BiomeView, SIGNAL(increaseZoom()), this, SLOT(increaseZoom()));
+	connect(m_BiomeView, SIGNAL(decreaseZoom()), this, SLOT(decreaseZoom()));
+	connect(m_BiomeView, SIGNAL(wheelUp()),      this, SLOT(increaseZoom()));
+	connect(m_BiomeView, SIGNAL(wheelDown()),    this, SLOT(decreaseZoom()));
+
 	m_MainLayout = new QHBoxLayout();
 	m_MainLayout->addWidget(m_BiomeView, 1);
 	m_MainLayout->setMenuBar(menuBar());
@@ -129,6 +143,68 @@ void MainWindow::openVanillaWorld()
 
 
 
+void MainWindow::centerView()
+{
+	m_BiomeView->setPosition(0, 0);
+}
+
+
+
+
+
+void MainWindow::setViewZoom()
+{
+	// The zoom level is stored in the sender action's data, retrieve it:
+	QAction * action = qobject_cast<QAction *>(sender());
+	if (action == nullptr)
+	{
+		return;
+	}
+	double newZoom = m_ViewZooms[action->data().toInt()];
+	m_BiomeView->setZoomLevel(newZoom);
+	action->setChecked(true);
+}
+
+
+
+
+
+void MainWindow::increaseZoom()
+{
+	// If already at max zoom, bail out:
+	if (m_CurrentZoomLevel >= ARRAYCOUNT(m_ViewZooms) - 1)
+	{
+		return;
+	}
+
+	// Increase the zoom level:
+	m_CurrentZoomLevel += 1;
+	m_actViewZoom[m_CurrentZoomLevel]->setChecked(true);
+	m_BiomeView->setZoomLevel(m_ViewZooms[m_CurrentZoomLevel]);
+}
+
+
+
+
+
+void MainWindow::decreaseZoom()
+{
+	// If already at min zoom, bail out:
+	if (m_CurrentZoomLevel == 0)
+	{
+		return;
+	}
+
+	// Decrease the zoom level:
+	m_CurrentZoomLevel -= 1;
+	m_actViewZoom[m_CurrentZoomLevel]->setChecked(true);
+	m_BiomeView->setZoomLevel(m_ViewZooms[m_CurrentZoomLevel]);
+}
+
+
+
+
+
 void MainWindow::initMinecraftPath()
 {
 	#ifdef Q_OS_MAC
@@ -147,6 +223,7 @@ void MainWindow::initMinecraftPath()
 
 void MainWindow::createActions()
 {
+	// Map menu:
 	createWorldActions();
 
 	m_actNewGen = new QAction(tr("&New generator"), this);
@@ -173,6 +250,26 @@ void MainWindow::createActions()
 	m_actExit->setShortcut(tr("Alt+X"));
 	m_actExit->setStatusTip(tr("Exit %1").arg(QApplication::instance()->applicationName()));
 	connect(m_actExit, SIGNAL(triggered()), this, SLOT(close()));
+
+	// View menu:
+	m_actViewCenter = new QAction(tr("&Reset to center"), this);
+	m_actViewCenter->setStatusTip(tr("Scrolls the view back to the map center"));
+	connect(m_actViewCenter, SIGNAL(triggered()), this, SLOT(centerView()));
+
+	QActionGroup * zoomGroup = new QActionGroup(this);
+	for (int i = 0; i < ARRAYCOUNT(m_ViewZooms); i++)
+	{
+		m_actViewZoom[i] = new QAction(tr("&Zoom %1%").arg(std::floor(m_ViewZooms[i] * 100)), this);
+		m_actViewZoom[i]->setCheckable(true);
+		if ((int)(m_ViewZooms[i] * 16) == 16)
+		{
+			m_actViewZoom[i]->setChecked(true);
+			m_CurrentZoomLevel = i;
+		}
+		m_actViewZoom[i]->setData(QVariant(i));
+		zoomGroup->addAction(m_actViewZoom[i]);
+		connect(m_actViewZoom[i], SIGNAL(triggered()), this, SLOT(setViewZoom()));
+	}
 }
 
 
@@ -220,6 +317,7 @@ void MainWindow::createWorldActions()
 
 void MainWindow::createMenus()
 {
+	// Map menu:
 	QMenu * file = menuBar()->addMenu(tr("&Map"));
 	file->addAction(m_actNewGen);
 	file->addAction(m_actOpenGen);
@@ -235,6 +333,15 @@ void MainWindow::createMenus()
 	file->addAction(m_actReload);
 	file->addSeparator();
 	file->addAction(m_actExit);
+
+	// View menu:
+	QMenu * view = menuBar()->addMenu(tr("&View"));
+	view->addAction(m_actViewCenter);
+	view->addSeparator();
+	for (size_t i = 0; i < ARRAYCOUNT(m_actViewZoom); i++)
+	{
+		view->addAction(m_actViewZoom[i]);
+	}
 }
 
 
diff --git a/Tools/QtBiomeVisualiser/MainWindow.h b/Tools/QtBiomeVisualiser/MainWindow.h
index 6490a937f..54a9cc6c7 100644
--- a/Tools/QtBiomeVisualiser/MainWindow.h
+++ b/Tools/QtBiomeVisualiser/MainWindow.h
@@ -39,13 +39,30 @@ private slots:
 	/** Opens a vanilla world that is specified by the calling action. */
 	void openVanillaWorld();
 
+	/** Moves the view to the map's center. */
+	void centerView();
+
+	/** Sets the zoom level specified in the triggering action. */
+	void setViewZoom();
+
+	/** Sets a zoom level one step larger than current, if allowed. */
+	void increaseZoom();
+
+	/** Sets a zoom level one step smaller than current, if allowed. */
+	void decreaseZoom();
+
 protected:
+	/** The zoom levels */
+	static const double m_ViewZooms[10];
+
 	// Actions:
 	QAction * m_actNewGen;
 	QAction * m_actOpenGen;
 	QAction * m_actOpenWorld;
 	QAction * m_actReload;
 	QAction * m_actExit;
+	QAction * m_actViewCenter;
+	QAction * m_actViewZoom[ARRAYCOUNT(m_ViewZooms)];
 
 	/** List of actions that open the specific vanilla world. */
 	QList<QAction *> m_WorldActions;
@@ -65,6 +82,9 @@ protected:
 	/** The separator line between biome view and generator setup. */
 	QWidget * m_LineSeparator;
 
+	/** Index into m_ViewZooms[] for the current zoom level. */
+	size_t m_CurrentZoomLevel;
+
 
 	/** Initializes the m_MinecraftPath based on the proper MC path */
 	void initMinecraftPath();