1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef UI_VIEWS_CONTROLS_TABLE_TABLE_HEADER_H_ 6 #define UI_VIEWS_CONTROLS_TABLE_TABLE_HEADER_H_ 7 8 #include "ui/gfx/font.h" 9 #include "ui/views/view.h" 10 #include "ui/views/views_export.h" 11 12 namespace views { 13 14 class TableView; 15 16 // Views used to render the header for the table. 17 class VIEWS_EXPORT TableHeader : public views::View { 18 public: 19 // Amount the text is padded on the left/right side. 20 static const int kHorizontalPadding; 21 22 // Amount of space reserved for the indicator and padding. 23 static const int kSortIndicatorWidth; 24 25 explicit TableHeader(TableView* table); 26 virtual ~TableHeader(); 27 28 const gfx::Font& font() const { return font_; } 29 30 // views::View overrides. 31 virtual void Layout() OVERRIDE; 32 virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE; 33 virtual gfx::Size GetPreferredSize() OVERRIDE; 34 virtual gfx::NativeCursor GetCursor(const ui::MouseEvent& event) OVERRIDE; 35 virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE; 36 virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE; 37 virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE; 38 virtual void OnMouseCaptureLost() OVERRIDE; 39 virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE; 40 41 private: 42 // Used to track the column being resized. 43 struct ColumnResizeDetails { 44 ColumnResizeDetails() : column_index(0), initial_x(0), initial_width(0) {} 45 46 // Index into table_->visible_columns() that is being resized. 47 int column_index; 48 49 // X-coordinate of the mouse at the time the resize started. 50 int initial_x; 51 52 // Width of the column when the drag started. 53 int initial_width; 54 }; 55 56 // If not already resizing and |event| is over a resizable column starts 57 // resizing. 58 bool StartResize(const ui::LocatedEvent& event); 59 60 // Continues a resize operation. Does nothing if not in the process of 61 // resizing. 62 void ContinueResize(const ui::LocatedEvent& event); 63 64 // Toggles the sort order of the column at the location in |event|. 65 void ToggleSortOrder(const ui::LocatedEvent& event); 66 67 // Returns the column to resize given the specified x-coordinate, or -1 if |x| 68 // is not in the resize range of any columns. 69 int GetResizeColumn(int x) const; 70 71 bool is_resizing() const { return resize_details_.get() != NULL; } 72 73 const gfx::Font font_; 74 75 TableView* table_; 76 77 // If non-null a resize is in progress. 78 scoped_ptr<ColumnResizeDetails> resize_details_; 79 80 DISALLOW_COPY_AND_ASSIGN(TableHeader); 81 }; 82 83 } // namespace views 84 85 #endif // UI_VIEWS_CONTROLS_TABLE_TABLE_HEADER_H_ 86
