speed up math drawing

[features.git] / src / mathed / math_xdata.C

diff --git a/src/mathed/math_xdata.C b/src/mathed/math_xdata.C
index cab9a2c337f78aae32f2360e4e2ae0a1db0e6249..3a1faff1fc95ef251b74eac8a197c9d94a94b61c 100644 (file)
--- a/src/mathed/math_xdata.C
+++ b/src/mathed/math_xdata.C
@@ -18,13 +18,26 @@ extern MathScriptInset const * asScript(MathArray::const_iterator it);
 
 
 MathXArray::MathXArray()
-       : width_(0), ascent_(0), descent_(0), xo_(0), yo_(0), size_()
+       : width_(0), ascent_(0), descent_(0), xo_(0), yo_(0), size_(),
+         clean_(false), drawn_(false)
 {}
 
 
+void MathXArray::touch() const
+{      
+       clean_  = false;
+       drawn_  = false;
+}
+
+
 void MathXArray::metrics(MathMetricsInfo const & mi) const
 {
-       size_ = mi;
+       if (clean_)
+               return;
+
+       size_   = mi;
+       clean_  = true;
+       drawn_  = false;
 
        if (data_.empty()) {
                mathed_char_dim(LM_TC_VAR, mi, 'I', ascent_, descent_, width_);
@@ -58,8 +71,12 @@ void MathXArray::metrics(MathMetricsInfo const & mi) const
 
 void MathXArray::draw(Painter & pain, int x, int y) const
 {
-       xo_ = x;
-       yo_ = y;
+       //if (drawn_ && x == xo_ && y == yo_)
+       //      return;
+
+       xo_    = x;
+       yo_    = y;
+       drawn_ = true;
 
        if (data_.empty()) {
                pain.rectangle(x, y - ascent_, width_, height(), LColor::mathline);