[Kst] kdeextragear-2/kst/kst

[George Staikos]

CVS commit by staikos: 

first half of x-left alignment.  It requires "user intervention" to activate at
the moment because it doesn't trigger updates in all the other plots.  I'm
trying to avoid an O(n^2) paint problem which is why the obvious algorithm
isn't implemented yet.


  M +40 -1     kst2dplot.cpp   1.80


--- kdeextragear-2/kst/kst/kst2dplot.cpp  #1.79:1.80
@@ -50,4 +50,32 @@
 #include "kst.h"
 
+#include <kstaticdeleter.h>
+
+class PlotDisplayManager;
+KStaticDeleter<PlotDisplayManager> pdManager;
+
+class PlotDisplayManager {
+  friend class KStaticDeleter<PlotDisplayManager>;
+  public:
+    static PlotDisplayManager *self() {
+      if (!_self) {
+        _self = pdManager.setObject(_self, new PlotDisplayManager);
+      }
+
+      return _self;
+    }
+
+    double xOffset;
+
+  protected:
+    PlotDisplayManager() : xOffset(0) {}
+    ~PlotDisplayManager() {}
+
+    static PlotDisplayManager *_self;
+};
+
+PlotDisplayManager *PlotDisplayManager::_self = 0L;
+
+
 Kst2DPlot::Kst2DPlot(const QString& in_tag,
                  KstScaleModeType yscale_in,
@@ -864,4 +892,10 @@ void Kst2DPlot::updateTieBox(QPainter& p
 void Kst2DPlot::paint(QPainter& p) {
   setpixrect(_geom.x(), _geom.y());
+  double x = getXBorder(p);
+  PlotDisplayManager *dm = PlotDisplayManager::self();
+  if (x > dm->xOffset) {
+    dm->xOffset = x;
+    paint(p, dm->xOffset);
+  }
   _buffer.paintInto(p, geometry());
   updateTieBox(p);
@@ -874,5 +908,10 @@ void Kst2DPlot::draw() {
   _buffer.buffer().fill(backgroundColor());
   QPainter p(&_buffer.buffer());
-  paint(p, 0); // FIXME: must set a proper value for xleft
+  double x = getXBorder(p);
+  PlotDisplayManager *dm = PlotDisplayManager::self();
+  if (x > dm->xOffset) {
+    dm->xOffset = x;
+  }
+  paint(p, dm->xOffset);
 }