Changeset 8127 in ntrip for trunk/BNC/qwt/qwt_plot_rasteritem.h

Timestamp:

May 10, 2017, 3:20:54 PM (7 years ago)

Author:

stoecker

Message:

update qwt and qwtpolar, many QT5 fixes (unfinished)

File:

• trunk/BNC/qwt/qwt_plot_rasteritem.h (modified) (2 diffs)

trunk/BNC/qwt/qwt_plot_rasteritem.h

@@ -39 +39 @@
 public:
     /*!
-      - NoCache\n
-        renderImage() is called, whenever the item has to be repainted
-      - PaintCache\n
-        renderImage() is called, whenever the image cache is not valid,
-        or the scales, or the size of the canvas has changed. This type
-        of cache is only useful for improving the performance of hide/show
-        operations. All other situations are already handled by the
-        plot canvas cache.
-
+      \brief Cache policy
       The default policy is NoCache
      */
     enum CachePolicy
     {
+        /*!
+          renderImage() is called each time the item has to be repainted
+         */
         NoCache,
+
+        /*!
+          renderImage() is called, whenever the image cache is not valid,
+          or the scales, or the size of the canvas has changed. 
+
+          This type of cache is useful for improving the performance 
+          of hide/show operations or manipulations of the alpha value. 
+          All other situations are handled by the canvas backing store.
+         */
         PaintCache
     };
@@ -118 +122 @@
       \param area Requested area for the image in scale coordinates
       \param imageSize Requested size of the image
+   
+      \return Rendered image
      */
     virtual QImage renderImage( const QwtScaleMap &xMap,