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| 1 // Copyright (c) 2011 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_WIDGET_TOOLTIP_MANAGER_H_ | |
| 6 #define UI_VIEWS_WIDGET_TOOLTIP_MANAGER_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 #include "base/strings/string16.h" | |
| 12 #include "ui/gfx/native_widget_types.h" | |
| 13 #include "ui/views/views_export.h" | |
| 14 | |
| 15 namespace gfx { | |
| 16 class Display; | |
| 17 class FontList; | |
| 18 } // namespace gfx | |
| 19 | |
| 20 namespace views { | |
| 21 | |
| 22 class View; | |
| 23 | |
| 24 // TooltipManager takes care of the wiring to support tooltips for Views. You | |
| 25 // almost never need to interact directly with TooltipManager, rather look to | |
| 26 // the various tooltip methods on View. | |
| 27 class VIEWS_EXPORT TooltipManager { | |
| 28 public: | |
| 29 // When a NativeView has capture all events are delivered to it. In some | |
| 30 // situations, such as menus, we want the tooltip to be shown for the | |
| 31 // NativeView the mouse is over, even if it differs from the NativeView that | |
| 32 // has capture (with menus the first menu shown has capture). To enable this | |
| 33 // if the NativeView that has capture has the same value for the property | |
| 34 // |kGroupingPropertyKey| as the NativeView the mouse is over the tooltip is | |
| 35 // shown. | |
| 36 static const char kGroupingPropertyKey[]; | |
| 37 | |
| 38 TooltipManager() {} | |
| 39 virtual ~TooltipManager() {} | |
| 40 | |
| 41 // Returns the height of tooltips. This should only be invoked from within | |
| 42 // GetTooltipTextOrigin. | |
| 43 static int GetTooltipHeight(); | |
| 44 | |
| 45 // Returns the maximum width of the tooltip. |x| and |y| give the location | |
| 46 // the tooltip is to be displayed on in screen coordinates. |context| is | |
| 47 // used to determine which gfx::Screen should be used. | |
| 48 static int GetMaxWidth(int x, int y, gfx::NativeView context); | |
| 49 | |
| 50 // Same as GetMaxWidth(), but takes a Display. | |
| 51 static int GetMaxWidth(const gfx::Display& display); | |
| 52 | |
| 53 // If necessary trims the text of a tooltip to ensure we don't try to display | |
| 54 // a mega-tooltip. | |
| 55 static void TrimTooltipText(base::string16* text); | |
| 56 | |
| 57 // Returns the font list used for tooltips. | |
| 58 virtual const gfx::FontList& GetFontList() const = 0; | |
| 59 | |
| 60 // Notification that the view hierarchy has changed in some way. | |
| 61 virtual void UpdateTooltip() = 0; | |
| 62 | |
| 63 // Invoked when the tooltip text changes for the specified views. | |
| 64 virtual void TooltipTextChanged(View* view) = 0; | |
| 65 }; | |
| 66 | |
| 67 } // namespace views | |
| 68 | |
| 69 #endif // UI_VIEWS_WIDGET_TOOLTIP_MANAGER_H_ | |
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