master 1cd6737a38: Use BControlLook to determine scroll bar size on Haiku

[Po Lu]

branch: master
commit 1cd6737a38723f482db73a8e4739176a0d524c57
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Use BControlLook to determine scroll bar size on Haiku
    
    * src/haiku_support.cc (BScrollBar_default_size): Use
    BControlLook instead of legacy constants.
---
 src/haiku_support.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/haiku_support.cc b/src/haiku_support.cc
index 0f4ec2cd7c..22a977a4a6 100644
--- a/src/haiku_support.cc
+++ b/src/haiku_support.cc
@@ -36,6 +36,7 @@ along with GNU Emacs.  If not, see 
<https://www.gnu.org/licenses/>.  */
 #include <interface/MenuBar.h>
 #include <interface/Alert.h>
 #include <interface/Button.h>
+#include <interface/ControlLook.h>
 
 #include <locale/UnicodeChar.h>
 
@@ -2019,7 +2020,9 @@ BView_scroll_bar_update (void *sb, int portion, int 
whole, int position)
 int
 BScrollBar_default_size (int horizontal_p)
 {
-  return horizontal_p ? B_H_SCROLL_BAR_HEIGHT : B_V_SCROLL_BAR_WIDTH;
+  return be_control_look->GetScrollBarWidth (horizontal_p
+                                            ? B_HORIZONTAL
+                                            : B_VERTICAL);
 }
 
 /* Invalidate VIEW, causing it to be drawn again.  */