gecko-dev/layout/xul/nsSliderFrame.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsSliderFrame_h__
#define nsSliderFrame_h__
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#include "mozilla/Attributes.h"
#include "nsRepeatService.h"
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#include "nsBoxFrame.h"
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#include "nsIAtom.h"
#include "nsCOMPtr.h"
#include "nsITimer.h"
#include "nsIDOMEventListener.h"
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class nsITimer;
class nsSliderFrame;
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nsIFrame* NS_NewSliderFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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class nsSliderMediator final : public nsIDOMEventListener
{
public:
NS_DECL_ISUPPORTS
nsSliderFrame* mSlider;
explicit nsSliderMediator(nsSliderFrame* aSlider) { mSlider = aSlider; }
virtual void SetSlider(nsSliderFrame* aSlider) { mSlider = aSlider; }
NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent) override;
protected:
virtual ~nsSliderMediator() {}
};
class nsSliderFrame : public nsBoxFrame
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{
public:
NS_DECL_FRAMEARENA_HELPERS
NS_DECL_QUERYFRAME_TARGET(nsSliderFrame)
NS_DECL_QUERYFRAME
friend class nsSliderMediator;
explicit nsSliderFrame(nsStyleContext* aContext);
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virtual ~nsSliderFrame();
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#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(NS_LITERAL_STRING("SliderFrame"), aResult);
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}
#endif
virtual nsSize GetPrefSize(nsBoxLayoutState& aBoxLayoutState) override;
virtual nsSize GetMinSize(nsBoxLayoutState& aBoxLayoutState) override;
virtual nsSize GetMaxSize(nsBoxLayoutState& aBoxLayoutState) override;
NS_IMETHOD DoLayout(nsBoxLayoutState& aBoxLayoutState) override;
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// nsIFrame overrides
virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
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virtual void BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) override;
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) override;
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) override;
virtual void Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* asPrevInFlow) override;
virtual nsresult HandleEvent(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) override;
virtual nsIAtom* GetType() const override;
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// nsContainerFrame overrides
virtual void SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList) override;
virtual void AppendFrames(ChildListID aListID,
nsFrameList& aFrameList) override;
virtual void InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList) override;
virtual void RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame) override;
nsresult StartDrag(nsIDOMEvent* aEvent);
nsresult StopDrag();
static int32_t GetCurrentPosition(nsIContent* content);
static int32_t GetMinPosition(nsIContent* content);
static int32_t GetMaxPosition(nsIContent* content);
static int32_t GetIncrement(nsIContent* content);
static int32_t GetPageIncrement(nsIContent* content);
static int32_t GetIntegerAttribute(nsIContent* content, nsIAtom* atom, int32_t defaultValue);
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void EnsureOrient();
NS_IMETHOD HandlePress(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) override;
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NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus,
bool aControlHeld) override
{
return NS_OK;
}
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NS_IMETHOD HandleDrag(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) override
{
return NS_OK;
}
NS_IMETHOD HandleRelease(nsPresContext* aPresContext,
mozilla::WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) override;
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// Return the ratio the scrollbar thumb should move in proportion to the
// scrolled frame.
float GetThumbRatio() const;
private:
bool GetScrollToClick();
nsIFrame* GetScrollbar();
bool ShouldScrollForEvent(mozilla::WidgetGUIEvent* aEvent);
bool ShouldScrollToClickForEvent(mozilla::WidgetGUIEvent* aEvent);
bool IsEventOverThumb(mozilla::WidgetGUIEvent* aEvent);
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void PageUpDown(nscoord change);
void SetCurrentThumbPosition(nsIContent* aScrollbar, nscoord aNewPos, bool aIsSmooth,
bool aMaySnap);
void SetCurrentPosition(nsIContent* aScrollbar, int32_t aNewPos, bool aIsSmooth);
void SetCurrentPositionInternal(nsIContent* aScrollbar, int32_t pos,
bool aIsSmooth);
void CurrentPositionChanged();
void DragThumb(bool aGrabMouseEvents);
void AddListener();
void RemoveListener();
bool isDraggingThumb();
void StartRepeat() {
nsRepeatService::GetInstance()->Start(Notify, this);
}
void StopRepeat() {
nsRepeatService::GetInstance()->Stop(Notify, this);
}
void Notify();
static void Notify(void* aData) {
(static_cast<nsSliderFrame*>(aData))->Notify();
}
void PageScroll(nscoord aChange);
nsPoint mDestinationPoint;
nsRefPtr<nsSliderMediator> mMediator;
float mRatio;
nscoord mDragStart;
nscoord mThumbStart;
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int32_t mCurPos;
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nscoord mChange;
bool mDragFinished;
// true if an attribute change has been caused by the user manipulating the
// slider. This allows notifications to tell how a slider's current position
// was changed.
bool mUserChanged;
static bool gMiddlePref;
static int32_t gSnapMultiplier;
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}; // class nsSliderFrame
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#endif