[Libreoffice-commits] core.git: vcl/source

[Jan-Marek Glogowski (via logerrit)]

 vcl/source/window/toolbox.cxx |   31 ++++++++++++++++---------------
 1 file changed, 16 insertions(+), 15 deletions(-)

New commits:
commit 17b75eb1d7032f8ff85d9af1ec635fa1800cca1e
Author:     Jan-Marek Glogowski <glogow at fbihome.de>
AuthorDate: Tue Jun 30 16:49:52 2020 +0200
Commit:     Jan-Marek Glogowski <glogow at fbihome.de>
CommitDate: Wed Jul 1 17:18:15 2020 +0200

    tdf#130991 Fit the drop-down arrow into its rect
    
    Looking at the original fixed-size arrow painting code replaced
    in commit b62c43d1200e524369d9c7c2bd1dad3044efd672 ("Anti-alias
    toolbar button drop-downs."), it  used some fixed values of 5
    and 3 to match the arrow box width of 11.
    
    The new code assumes the width is the expected arrow size, minus
    a minimal margin to separate the arrow from the button border,
    and there is enough height available. Based on these assumptions,
    the code now scales, positions and paints the triangle to fill
    the available space.
    
    Change-Id: Ied721e494d105106086ef6252e72ae7395eafe08
    Reviewed-on: https://gerrit.libreoffice.org/c/core/+/97537
    Tested-by: Jenkins
    Reviewed-by: Jan-Marek Glogowski <glogow at fbihome.de>

diff --git a/vcl/source/window/toolbox.cxx b/vcl/source/window/toolbox.cxx
index 02600732c747..935a7e3ae9ec 100644
--- a/vcl/source/window/toolbox.cxx
+++ b/vcl/source/window/toolbox.cxx
@@ -2391,27 +2391,28 @@ static void ImplDrawDropdownArrow(vcl::RenderContext& rRenderContext, const tool
             rRenderContext.SetFillColor(COL_BLACK);
     }
 
-    float fScaleFactor = rRenderContext.GetDPIScaleFactor();
-
     tools::Polygon aPoly(4);
 
-    long width = round(rDropDownRect.getHeight()/5.5) * fScaleFactor; // scale triangle depending on theme/toolbar height with 7 for gtk, 5 for gen
-    long height = round(rDropDownRect.getHeight()/9.5) * fScaleFactor; // 4 for gtk, 3 for gen
-    if (width < 4) width = 4;
-    if (height < 3) height = 3;
+    // the assumption is, that the width always specifies the size of the expected arrow.
+    const long nMargin = round(2 * rRenderContext.GetDPIScaleFactor());
+    const long nSize = rDropDownRect.getWidth() - 2 * nMargin;
+    const long nHalfSize = (nSize + 1) / 2;
+    const long x = rDropDownRect.Left() + nMargin + (bRotate ? (rDropDownRect.getWidth() - nHalfSize) / 2 : 0);
+    const long y = rDropDownRect.Top() + nMargin + (rDropDownRect.getHeight() - (bRotate ? nSize : nHalfSize)) / 2;
 
-    long x = rDropDownRect.Left() + (rDropDownRect.getWidth() - width)/2;
-    long y = rDropDownRect.Top() + (rDropDownRect.getHeight() - height)/2;
-
-    long halfwidth = (width+1)>>1;
     aPoly.SetPoint(Point(x, y), 0);
-    aPoly.SetPoint(Point(x + halfwidth, y + height), 1);
-    aPoly.SetPoint(Point(x + halfwidth*2, y), 2);
+    if (bRotate) // >
+    {
+        aPoly.SetPoint(Point(x, y + nSize), 1);
+        aPoly.SetPoint(Point(x + nHalfSize, y + nHalfSize), 2);
+    }
+    else // v
+    {
+        aPoly.SetPoint(Point(x + nHalfSize, y + nHalfSize), 1);
+        aPoly.SetPoint(Point(x + nSize, y), 2);
+    }
     aPoly.SetPoint(Point(x, y), 3);
 
-    if (bRotate) // TESTME: harder ...
-        aPoly.Rotate(Point(x,y+height/2),2700);
-
     auto aaflags = rRenderContext.GetAntialiasing();
     rRenderContext.SetAntialiasing(AntialiasingFlags::EnableB2dDraw);
     rRenderContext.DrawPolygon( aPoly );