Fix vertical range slider.

BUG=88017
TEST=Load a web page that should display a vertical slider and make sure it
appears vertical and correctly instead of horizonatally.  Note that the
thumb part appears too far to the right; I have confirmed this on all platforms
(win,linux,mac).  Since bug was was about a windows specific rendering issue,
I have opened another bug (89616) to keep track of the right offset.

Review URL: http://codereview.chromium.org/7400024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@92927 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 29 insertions, 4 deletions

diff --git a/ui/gfx/native_theme.h b/ui/gfx/native_theme.h
index 665b78e..2f1ba70 100644
--- a/ui/gfx/native_theme.h
+++ b/ui/gfx/native_theme.h
@@ -172,6 +172,7 @@ class UI_API NativeTheme {
   };
 
   struct TrackbarExtraParams {
+    bool vertical;
     int classic_state;  // Used on Windows when uxtheme is not available.
   };
 
diff --git a/ui/gfx/native_theme_win.cc b/ui/gfx/native_theme_win.cc
index 29e1faf..1fade35 100644
--- a/ui/gfx/native_theme_win.cc
+++ b/ui/gfx/native_theme_win.cc
@@ -931,6 +931,9 @@ HRESULT NativeThemeWin::PaintTrackbar(
     const gfx::Rect& rect,
     const TrackbarExtraParams& extra) const {
   int part_id = part == kTrackbarTrack ? TKP_TRACK : TKP_THUMBBOTTOM;
+  if (extra.vertical)
+    part_id = part == kTrackbarTrack ? TKP_TRACKVERT : TKP_THUMBVERT;
+
   int state_id = 0;
   switch(state) {
     case kDisabled:
diff --git a/webkit/glue/webthemeengine_impl_win.cc b/webkit/glue/webthemeengine_impl_win.cc
index abbfa1f..7a39649 100644
--- a/webkit/glue/webthemeengine_impl_win.cc
+++ b/webkit/glue/webthemeengine_impl_win.cc
@@ -895,7 +895,10 @@ void WebThemeEngineImpl::paintTextField(
       gfx::NativeTheme::kTextField, native_state, gfx_rect, extra);
 }
 
-static gfx::NativeTheme::State WebTrackbarStateToGfx(int part, int state) {
+static gfx::NativeTheme::State WebTrackbarStateToGfx(
+    int part,
+    int state,
+    gfx::NativeTheme::TrackbarExtraParams* extra) {
   gfx::NativeTheme::State gfx_state = gfx::NativeTheme::kNormal;
   switch (state) {
     case TUS_NORMAL:
@@ -914,6 +917,21 @@ static gfx::NativeTheme::State WebTrackbarStateToGfx(int part, int state) {
       NOTREACHED() << "Invalid state: " << state;
       break;
   }
+
+  switch (part) {
+    case TKP_TRACK:
+    case TKP_THUMBBOTTOM:
+      extra->vertical = false;
+      break;
+    case TKP_TRACKVERT:
+    case TKP_THUMBVERT:
+      extra->vertical = true;
+      break;
+    default:
+      NOTREACHED() << "Invalid part: " << part;
+      break;
+  }
+
   return gfx_state;
 }
 
@@ -923,9 +941,11 @@ void WebThemeEngineImpl::paintTrackbar(
   gfx::NativeTheme::Part native_part = gfx::NativeTheme::kTrackbarTrack;
   switch (part) {
     case TKP_TRACK:
+    case TKP_TRACKVERT:
       native_part = gfx::NativeTheme::kTrackbarTrack;
       break;
     case TKP_THUMBBOTTOM:
+    case TKP_THUMBVERT:
       native_part = gfx::NativeTheme::kTrackbarThumb;
       break;
     default:
@@ -933,10 +953,11 @@ void WebThemeEngineImpl::paintTrackbar(
       break;
   }
 
-  gfx::NativeTheme::State native_state = WebTrackbarStateToGfx(part, state);
-  gfx::Rect gfx_rect(rect.x, rect.y, rect.width, rect.height);
   gfx::NativeTheme::ExtraParams extra;
-  extra.button.classic_state = classic_state;
+  gfx::NativeTheme::State native_state = WebTrackbarStateToGfx(part, state,
+                                                               &extra.trackbar);
+  gfx::Rect gfx_rect(rect.x, rect.y, rect.width, rect.height);
+  extra.trackbar.classic_state = classic_state;
   gfx::NativeTheme::instance()->Paint(canvas, native_part,
                                       native_state, gfx_rect, extra);
 }