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* Instead of invoking _DrawLines out of the app-server drawing context,

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we request the drawing via Invalidate() - this make use of the app-server's
  potential double buffering, whenever that is active. This change reduces 
  flickering in VESA mode considerably.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29962 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Oliver Tappe
2009-04-06 11:31:10 +00:00
parent 865dbe341e
commit 4e50f1ae68
2 changed files with 31 additions and 3 deletions
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headers/os/interface/TextView.h
+4
View File
@@ -324,6 +324,10 @@ private:
void _DrawLines(int32 startLine, int32 endLine,
int32 startOffset = -1, bool erase = false);
void _RequestDrawLines(int32 startLine,
int32 endLine, int32 startOffset = -1,
bool erase = false);
void _DrawCaret(int32 offset);
void _ShowCaret();
void _HideCaret();
src/kits/interface/TextView.cpp
+27 -3
View File
@@ -1628,7 +1628,8 @@ BTextView::SetFontAndColor(int32 startOffset, int32 endOffset,
_Refresh(startOffset, endOffset, startOffset != endOffset, false);
} else {
// the line breaks wont change, simply redraw
_DrawLines(LineAt(startOffset), LineAt(endOffset), startOffset, true);
_RequestDrawLines(LineAt(startOffset), LineAt(endOffset), startOffset,
true);
}
}
@@ -3536,7 +3537,7 @@ BTextView::_Refresh(int32 fromOffset, int32 toOffset, bool erase, bool scroll)
_AutoResize(false);
_DrawLines(fromLine, toLine, drawOffset, erase);
_RequestDrawLines(fromLine, toLine, drawOffset, erase);
// erase the area below the text
BRect eraseRect = bounds;
@@ -4163,6 +4164,29 @@ BTextView::_DrawLines(int32 startLine, int32 endLine, int32 startOffset,
}
void
BTextView::_RequestDrawLines(int32 startLine, int32 endLine,
int32 startOffset, bool erase)
{
if (!Window())
return;
long maxLine = fLines->NumLines() - 1;
if (startLine < 0)
startLine = 0;
if (endLine > maxLine)
endLine = maxLine;
STELine *from = (*fLines)[startLine];
STELine *to = endLine == maxLine ? NULL : (*fLines)[endLine + 1];
BRect invalidRect(fTextRect.left, from->origin + fTextRect.top,
fTextRect.right,
to != NULL ? to->origin + fTextRect.top : fTextRect.bottom);
Invalidate(invalidRect);
Window()->UpdateIfNeeded();
}
void
BTextView::_DrawCaret(int32 offset)
{
@@ -4566,7 +4590,7 @@ BTextView::_AutoResize(bool redraw)
fTextRect.right = fTextRect.left + newWidth;
if (redraw)
_DrawLines(0, 0);
_RequestDrawLines(0, 0);
// erase any potential left over outside the text rect
// (can only be on right hand side)