Improved search algorithm for determining text size:

- check using previous scale, often gives correct answer when typing
 - binary search + bound estimation otherwise
This allows the step size to be decreased, giving a better fit.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@624 0fc631ac-6414-0410-93d0-97cfa31319b6

src/render/value/text.cpp

@@ -39,10 +39,14 @@ void TextValueViewer::draw(RotatedDC& dc) {
 }
 
 void TextValueViewer::onValueChange() {
-	v.reset();
+	v.reset(false);
 }
 
 void TextValueViewer::onStyleChange(bool already_prepared) {
-	v.reset();
+	v.reset(true);
 	if (!already_prepared) viewer.redraw(*this);
 }
+
+void TextValueViewer::onAction(const Action&, bool undone) {
+	v.reset(true);
+}

src/render/value/text.hpp

@@ -25,6 +25,7 @@ class TextValueViewer : public ValueViewer {
 	virtual void draw(RotatedDC& dc);
 	virtual void onValueChange();
 	virtual void onStyleChange(bool);
+	virtual void onAction(const Action&, bool undone);
 	
   protected:
 	TextViewer v;