Lands http://codereview.chromium.org/652010 for Thiago:

views: refactor out the "Alt" TableView feature.

BUG=34181
TEST=open bookmarks manager, type something in the search text-field, see if a
message is showed when there is no match and see if everything still works as
before.

Review URL: http://codereview.chromium.org/660380

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@40406 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 68 insertions, 2 deletions

diff --git a/views/controls/table/table_view.cc b/views/controls/table/table_view.cc
index 35a2399..0e5b46c 100644
--- a/views/controls/table/table_view.cc
+++ b/views/controls/table/table_view.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c)2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -11,7 +11,9 @@
 
 #include "app/gfx/canvas.h"
 #include "app/gfx/favicon_size.h"
+#include "app/gfx/font.h"
 #include "app/gfx/icon_util.h"
+#include "app/l10n_util.h"
 #include "app/l10n_util_win.h"
 #include "app/resource_bundle.h"
 #include "app/table_model.h"
@@ -1118,6 +1120,22 @@ int TableView::GetColumnWidth(int column_id) {
       list_view_, static_cast<int>(i - visible_columns_.begin()));
 }
 
+void TableView::PaintAltText() {
+  if (alt_text_.empty())
+    return;
+
+  HDC dc = GetDC(GetNativeControlHWND());
+  gfx::Font font = GetAltTextFont();
+  gfx::Rect bounds = GetAltTextBounds();
+  gfx::Canvas canvas(bounds.width(), bounds.height(), false);
+  // Pad by 1 for halo.
+  canvas.DrawStringWithHalo(alt_text_, font, SK_ColorDKGRAY, SK_ColorWHITE, 1,
+                            1, bounds.width() - 2, bounds.height() - 2,
+                            l10n_util::DefaultCanvasTextAlignment());
+  canvas.getTopPlatformDevice().drawToHDC(dc, bounds.x(), bounds.y(), NULL);
+  ReleaseDC(GetNativeControlHWND(), dc);
+}
+
 LRESULT TableView::OnCustomDraw(NMLVCUSTOMDRAW* draw_info) {
   switch (draw_info->nmcd.dwDrawStage) {
     case CDDS_PREPAINT: {
@@ -1333,6 +1351,18 @@ void TableView::SetPreferredSize(const gfx::Size& size) {
   PreferredSizeChanged();
 }
 
+void TableView::SetAltText(const std::wstring& alt_text) {
+  if (alt_text == alt_text_)
+    return;
+
+  alt_text_ = alt_text;
+  if (!GetNativeControlHWND())
+    return;
+
+  RECT alt_text_bounds = GetAltTextBounds().ToRECT();
+  InvalidateRect(GetNativeControlHWND(), &alt_text_bounds, FALSE);
+}
+
 void TableView::UpdateListViewCache0(int start, int length, bool add) {
   if (is_sorted()) {
     if (add)
@@ -1492,6 +1522,23 @@ void TableView::UpdateContentOffset() {
   content_offset_ = origin.y + header_bounds.bottom - header_bounds.top;
 }
 
+gfx::Rect TableView::GetAltTextBounds() {
+  static const int kXOffset = 16;
+  DCHECK(GetNativeControlHWND());
+  RECT client_rect_rect;
+  GetClientRect(GetNativeControlHWND(), &client_rect_rect);
+  gfx::Rect client_rect(client_rect_rect);
+  gfx::Font font = GetAltTextFont();
+  // Pad height by 2 for halo.
+  return gfx::Rect(kXOffset, content_offset(), client_rect.width() - kXOffset,
+                   std::max(kImageSize, font.height() + 2));
+}
+
+gfx::Font TableView::GetAltTextFont() {
+  return ResourceBundle::GetSharedInstance().GetFont(ResourceBundle::BaseFont);
+}
+
+
 //
 // TableSelectionIterator
 //
diff --git a/views/controls/table/table_view.h b/views/controls/table/table_view.h
index 282d590..0ed3396 100644
--- a/views/controls/table/table_view.h
+++ b/views/controls/table/table_view.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -23,6 +23,10 @@ typedef struct tagNMLVCUSTOMDRAW NMLVCUSTOMDRAW;
 #include "views/controls/native_control.h"
 #endif  // defined(OS_WIN)
 
+namespace gfx {
+class Font;
+}
+
 struct TableColumn;
 class TableModel;
 class SkBitmap;
@@ -232,6 +236,10 @@ class TableView : public NativeControl,
     return view_to_model_.get() ? view_to_model_[view_index] : view_index;
   }
 
+  // Sets the text to display on top of the table. This is useful if the table
+  // is empty and you want to inform the user why.
+  void SetAltText(const std::wstring& alt_text);
+
  protected:
   // Overriden to return the position of the first selected row.
   virtual gfx::Point GetKeyboardContextMenuLocation();
@@ -293,6 +301,9 @@ class TableView : public NativeControl,
   // content.
   int content_offset() const { return content_offset_; }
 
+  // Draws the alt_text_. Does nothing if there is no alt_text_.
+  void PaintAltText();
+
   // Size (width and height) of images.
   static const int kImageSize;
 
@@ -398,6 +409,12 @@ class TableView : public NativeControl,
   // Updates content_offset_ from the position of the header.
   void UpdateContentOffset();
 
+  // Returns the bounds of the alt text.
+  gfx::Rect GetAltTextBounds();
+
+  // Returns the font used for alt text.
+  gfx::Font GetAltTextFont();
+
   TableModel* model_;
   TableTypes table_type_;
   TableViewObserver* table_view_observer_;
@@ -463,6 +480,8 @@ class TableView : public NativeControl,
   scoped_array<int> view_to_model_;
   scoped_array<int> model_to_view_;
 
+  std::wstring alt_text_;
+
   DISALLOW_COPY_AND_ASSIGN(TableView);
 };
 #endif  // defined(OS_WIN)