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 TooltipManager()38 TooltipManager() {} ~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_ 70