зеркало из https://github.com/mozilla/gecko-dev.git
100 строки
3.0 KiB
C++
100 строки
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsXULTooltipListener_h__
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#define nsXULTooltipListener_h__
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#include "nsIDOMEventListener.h"
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#include "nsITimer.h"
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#include "nsCOMPtr.h"
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#include "nsString.h"
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#include "Units.h"
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#include "nsIWeakReferenceUtils.h"
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#include "mozilla/Attributes.h"
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class nsIContent;
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class nsTreeColumn;
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namespace mozilla {
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namespace dom {
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class Event;
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class MouseEvent;
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class XULTreeElement;
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} // namespace dom
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class WidgetKeyboardEvent;
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} // namespace mozilla
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class nsXULTooltipListener final : public nsIDOMEventListener {
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIDOMEVENTLISTENER
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void MouseOut(mozilla::dom::Event* aEvent);
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void MouseMove(mozilla::dom::Event* aEvent);
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void AddTooltipSupport(nsIContent* aNode);
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void RemoveTooltipSupport(nsIContent* aNode);
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static nsXULTooltipListener* GetInstance() {
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if (!sInstance) sInstance = new nsXULTooltipListener();
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return sInstance;
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}
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static bool KeyEventHidesTooltip(const mozilla::WidgetKeyboardEvent&);
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static bool ShowTooltips();
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protected:
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nsXULTooltipListener();
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~nsXULTooltipListener();
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void KillTooltipTimer();
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void CheckTreeBodyMove(mozilla::dom::MouseEvent* aMouseEvent);
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mozilla::dom::XULTreeElement* GetSourceTree();
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nsresult ShowTooltip();
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void LaunchTooltip();
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nsresult HideTooltip();
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nsresult DestroyTooltip();
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// This method tries to find a tooltip for aTarget.
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nsresult FindTooltip(nsIContent* aTarget, nsIContent** aTooltip);
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// This method calls FindTooltip and checks that the tooltip
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// can be really used (i.e. tooltip is not a menu).
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nsresult GetTooltipFor(nsIContent* aTarget, nsIContent** aTooltip);
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static nsXULTooltipListener* sInstance;
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nsWeakPtr mSourceNode;
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nsWeakPtr mTargetNode;
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nsWeakPtr mCurrentTooltip;
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nsWeakPtr mPreviousMouseMoveTarget;
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// a timer for showing the tooltip
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nsCOMPtr<nsITimer> mTooltipTimer;
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static void sTooltipCallback(nsITimer* aTimer, void* aListener);
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// Screen coordinates of the last mousemove event, stored so that the tooltip
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// can be opened at this location.
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//
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// TODO(emilio): This duplicates a lot of code with ChromeTooltipListener.
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mozilla::LayoutDeviceIntPoint mMouseScreenPoint;
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// Tolerance for mousemove event
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static constexpr mozilla::LayoutDeviceIntCoord kTooltipMouseMoveTolerance = 7;
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// flag specifying if the tooltip has already been displayed by a MouseMove
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// event. The flag is reset on MouseOut so that the tooltip will display
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// the next time the mouse enters the node (bug #395668).
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bool mTooltipShownOnce;
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// special members for handling trees
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bool mIsSourceTree;
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bool mNeedTitletip;
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int32_t mLastTreeRow;
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RefPtr<nsTreeColumn> mLastTreeCol;
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};
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#endif // nsXULTooltipListener
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