changeset 12:f67ddc287bc3

* Add ability to create empty layers for editing
* Add first basic editing capability (adding points to a time instant layer)
* Add various keyboard and mouse shortcuts for navigation &c
* Add ability to resize a selection by dragging its edges
* Add maximum zoom level

--- a/base/Layer.cpp	Thu Jan 26 11:56:09 2006 +0000
+++ b/base/Layer.cpp	Thu Jan 26 16:15:40 2006 +0000
@@ -27,6 +27,13 @@
     m_view->removeLayer(this);
 }
 
+QString
+Layer::getPropertyContainerIconName() const
+{
+    return LayerFactory::instance()->getLayerIconName
+	(LayerFactory::instance()->getLayerType(this));
+}
+
 void
 Layer::setObjectName(const QString &name)
 {

--- a/base/Layer.h	Thu Jan 26 11:56:09 2006 +0000
+++ b/base/Layer.h	Thu Jan 26 16:15:40 2006 +0000
@@ -22,6 +22,7 @@
 class Model;
 class QPainter;
 class View;
+class QMouseEvent;
 
 /**
  * The base class for visual representations of the data found in a
@@ -53,6 +54,8 @@
 	return PositionBottom;
     }
 
+    virtual QString getPropertyContainerIconName() const;
+
     virtual QString getPropertyContainerName() const {
 	return objectName();
     }
@@ -92,11 +95,15 @@
 	return frame;
     }
 
-    // Paint and edit modes:
+    // Draw and edit modes:
     //
-    // Layer needs to get actual mouse events, I guess.  Paint mode is
+    // Layer needs to get actual mouse events, I guess.  Draw mode is
     // probably the easier.
 
+    virtual void drawStart(QMouseEvent *e) { }
+    virtual void drawDrag(QMouseEvent *e) { }
+    virtual void drawEnd(QMouseEvent *e) { }
+
     // Text mode:
     //
     // Label nearest feature.  We need to get the feature coordinates

--- a/base/View.cpp	Thu Jan 26 11:56:09 2006 +0000
+++ b/base/View.cpp	Thu Jan 26 16:15:40 2006 +0000
@@ -755,6 +755,26 @@
 }
 
 void
+View::scroll(bool right, bool lots)
+{
+    long delta;
+    if (lots) {
+	delta = ((width() / 2) * m_zoomLevel);
+    } else {
+	delta = ((width() / 20) * m_zoomLevel);
+    }
+    if (right) delta = -delta;
+
+    if (int(m_centreFrame) < delta) {
+	setCentreFrame(0);
+    } else if (int(m_centreFrame) - delta >= int(getModelsEndFrame())) {
+	setCentreFrame(getModelsEndFrame());
+    } else {
+	setCentreFrame(m_centreFrame - delta);
+    }
+}
+
+void
 View::checkProgress(void *object)
 {
 //    std::cerr << "View::checkProgress(" << object << ")" << std::endl;

--- a/base/View.h	Thu Jan 26 11:56:09 2006 +0000
+++ b/base/View.h	Thu Jan 26 16:15:40 2006 +0000
@@ -101,6 +101,11 @@
      */
     virtual void zoom(bool in);
 
+    /**
+     * Scroll left or right by a smallish or largish amount.
+     */
+    virtual void scroll(bool right, bool lots);
+
     virtual void addLayer(Layer *v);
     virtual void removeLayer(Layer *v); // does not delete the layer
     virtual int getLayerCount() const { return m_layers.size(); }

--- a/base/ZoomConstraint.h	Thu Jan 26 11:56:09 2006 +0000
+++ b/base/ZoomConstraint.h	Thu Jan 26 16:15:40 2006 +0000
@@ -17,7 +17,8 @@
  * the available zoom sizes for a view, for example based on cache
  * strategy or a (processing) window-size limitation.
  *
- * The default ZoomConstraint imposes no actual constraint.
+ * The default ZoomConstraint imposes no actual constraint except for
+ * a nominal maximum.
  */
 
 class ZoomConstraint
@@ -43,8 +44,11 @@
 				       RoundingDirection = RoundNearest)
 	const
     {
-	return requestedBlockSize;
+	if (requestedBlockSize > getMaxZoomLevel()) return getMaxZoomLevel();
+	else return requestedBlockSize;
     }
+
+    virtual size_t getMaxZoomLevel() const { return 262144; }
 };
 
 #endif