Improve user experience related to [http://core.tcl.tk/tk/tktview/1499165|dancing scrollbars]. Patch by Koen Danckaert.

1 files changed, 12 insertions, 8 deletions

diff --git a/generic/tkText.c b/generic/tkText.c
index cb89218..6e982b0 100644
--- a/generic/tkText.c
+++ b/generic/tkText.c
@@ -566,14 +566,6 @@ CreateWidget(
 	textPtr->end = NULL;
     }
 
-    /*
-     * Register with the B-tree. In some sense it would be best if we could do
-     * this later (after configuration options), so that any changes to
-     * start,end do not require a total recalculation.
-     */
-
-    TkBTreeAddClient(sharedPtr->tree, textPtr, textPtr->charHeight);
-
     textPtr->state = TK_TEXT_STATE_NORMAL;
     textPtr->relief = TK_RELIEF_FLAT;
     textPtr->cursor = None;
@@ -584,6 +576,14 @@ CreateWidget(
     textPtr->prevHeight = Tk_Height(newWin);
 
     /*
+     * Register with the B-tree. In some sense it would be best if we could do
+     * this later (after configuration options), so that any changes to
+     * start,end do not require a total recalculation.
+     */
+
+    TkBTreeAddClient(sharedPtr->tree, textPtr, textPtr->charHeight);
+
+    /*
      * This will add refCounts to textPtr.
      */
 
@@ -2319,6 +2319,7 @@ TextWorldChanged(
 {
     Tk_FontMetrics fm;
     int border;
+    int oldCharHeight = textPtr->charHeight;
 
     textPtr->charWidth = Tk_TextWidth(textPtr->tkfont, "0", 1);
     if (textPtr->charWidth <= 0) {
@@ -2330,6 +2331,9 @@ TextWorldChanged(
     if (textPtr->charHeight <= 0) {
 	textPtr->charHeight = 1;
     }
+    if (textPtr->charHeight != oldCharHeight) {
+        TkBTreeClientRangeChanged(textPtr, textPtr->charHeight);
+    }
     border = textPtr->borderWidth + textPtr->highlightWidth;
     Tk_GeometryRequest(textPtr->tkwin,
 	    textPtr->width * textPtr->charWidth + 2*textPtr->padX + 2*border,