view/src/nsView.h

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  37
  38 #ifndef nsView_h___
  39 #define nsView_h___
  40
  41 #include "nsIView.h"
  42 #include "nsRegion.h"
  43 #include "nsRect.h"
  44 #include "nsCRT.h"
  45 #include "nsIFactory.h"
  46 #include "nsEvent.h"
  47 #include <stdio.h>
  48
  49 //mmptemp
  50
  51 class nsIViewManager;
  52 class nsViewManager;
  53
  54 class nsView : public nsIView
  55 {
  56 public:
  57   nsView(nsViewManager* aViewManager = nsnull,
  58          nsViewVisibility aVisibility = nsViewVisibility_kShow);
  59
  60   NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
  61
  62   NS_IMETHOD  QueryInterface(const nsIID& aIID, void** aInstancePtr);
  63
  64   /**
  65    * Called to indicate that the position of the view has been changed.
  66    * The specified coordinates are in the parent view's coordinate space.
  67    * @param x new x position
  68    * @param y new y position
  69    */
  70   virtual void SetPosition(nscoord aX, nscoord aY);
  71   /**
  72    * Called to indicate that the dimensions of the view have been changed.
  73    * The x and y coordinates may be < 0, indicating that the view extends above
  74    * or to the left of its origin position. The term 'dimensions' indicates it
  75    * is relative to this view.
  76    */
  77   virtual void SetDimensions(const nsRect &aRect, PRBool aPaint = PR_TRUE,
  78                              PRBool aResizeWidget = PR_TRUE);
  79   void GetDimensions(nsRect &aRect) const { aRect = mDimBounds; aRect.x -= mPosX; aRect.y -= mPosY; }
  80   void GetDimensions(nsSize &aSize) const { aSize.width = mDimBounds.width; aSize.height = mDimBounds.height; }
  81
  82   /**
  83    * Called to indicate that the visibility of a view has been
  84    * changed.
  85    * @param visibility new visibility state
  86    */
  87   NS_IMETHOD  SetVisibility(nsViewVisibility visibility);
  88
  89   /**
  90    * Called to indicate that the z-index of a view has been changed.
  91    * The z-index is relative to all siblings of the view.
  92    * @param aAuto Indicate that the z-index of a view is "auto". An "auto" z-index
  93    * means that the view does not define a new stacking context,
  94    * which means that the z-indicies of the view's children are
  95    * relative to the view's siblings.
  96    * @param zindex new z depth
  97    */
  98   void SetZIndex(PRBool aAuto, PRInt32 aZIndex, PRBool aTopMost);
  99
 100   /**
 101    * Set/Get whether the view "floats" above all other views,
 102    * which tells the compositor not to consider higher views in
 103    * the view hierarchy that would geometrically intersect with
 104    * this view. This is a hack, but it fixes some problems with
 105    * views that need to be drawn in front of all other views.
 106    * @result PR_TRUE if the view floats, PR_FALSE otherwise.
 107    */
 108   NS_IMETHOD  SetFloating(PRBool aFloatingView);
 109
 110   // Helper function to get the view that's associated with a widget
 111   static nsView* GetViewFor(nsIWidget* aWidget) {
 112     return static_cast<nsView*>(nsIView::GetViewFor(aWidget));
 113   }
 114
 115   // Helper function to get mouse grabbing off this view (by moving it to the
 116   // parent, if we can)
 117   void DropMouseGrabbing();
 118
 119 public:
 120   // See nsIView::CreateWidget.
 121   nsresult CreateWidget(nsWidgetInitData *aWidgetInitData,
 122                         PRBool aEnableDragDrop,
 123                         PRBool aResetVisibility);
 124
 125   // See nsIView::CreateWidgetForParent.
 126   nsresult CreateWidgetForParent(nsIWidget* aParentWidget,
 127                                  nsWidgetInitData *aWidgetInitData,
 128                                  PRBool aEnableDragDrop,
 129                                  PRBool aResetVisibility);
 130
 131   // See nsIView::CreateWidgetForPopup.
 132   nsresult CreateWidgetForPopup(nsWidgetInitData *aWidgetInitData,
 133                                 nsIWidget* aParentWidget,
 134                                 PRBool aEnableDragDrop,
 135                                 PRBool aResetVisibility);
 136
 137   // NOT in nsIView, so only available in view module
 138   // These are also present in nsIView, but these versions return nsView and nsViewManager
 139   // instead of nsIView and nsIViewManager.
 140   nsView* GetFirstChild() const { return mFirstChild; }
 141   nsView* GetNextSibling() const { return mNextSibling; }
 142   nsView* GetParent() const { return mParent; }
 143   nsViewManager* GetViewManager() const { return mViewManager; }
 144   // These are superseded by a better interface in nsIView
 145   PRInt32 GetZIndex() const { return mZIndex; }
 146   PRBool GetZIndexIsAuto() const { return (mVFlags & NS_VIEW_FLAG_AUTO_ZINDEX) != 0; }
 147   // This is a better interface than GetDimensions(nsRect&) above
 148   nsRect GetDimensions() const { nsRect r = mDimBounds; r.MoveBy(-mPosX, -mPosY); return r; }
 149   // Same as GetBounds but converts to parent appunits if they are different.
 150   nsRect GetBoundsInParentUnits() const;
 151   // These are defined exactly the same in nsIView, but for now they have to be redeclared
 152   // here because of stupid C++ method hiding rules
 153
 154   PRBool HasNonEmptyDirtyRegion() {
 155     return mDirtyRegion && !mDirtyRegion->IsEmpty();
 156   }
 157   nsRegion* GetDirtyRegion() {
 158     if (!mDirtyRegion) {
 159       NS_ASSERTION(!mParent || GetFloating(),
 160                    "Only display roots should have dirty regions");
 161       mDirtyRegion = new nsRegion();
 162       NS_ASSERTION(mDirtyRegion, "Out of memory!");
 163     }
 164     return mDirtyRegion;
 165   }
 166
 167   void InsertChild(nsView *aChild, nsView *aSibling);
 168   void RemoveChild(nsView *aChild);
 169
 170   void SetParent(nsView *aParent) { mParent = aParent; }
 171   void SetNextSibling(nsView *aSibling) { mNextSibling = aSibling; }
 172
 173   PRUint32 GetViewFlags() const { return mVFlags; }
 174   void SetViewFlags(PRUint32 aFlags) { mVFlags = aFlags; }
 175
 176   void SetTopMost(PRBool aTopMost) { aTopMost ? mVFlags |= NS_VIEW_FLAG_TOPMOST : mVFlags &= ~NS_VIEW_FLAG_TOPMOST; }
 177   PRBool IsTopMost() { return((mVFlags & NS_VIEW_FLAG_TOPMOST) != 0); }
 178
 179   nsPoint ConvertFromParentCoords(nsPoint aPt) const;
 180   void ResetWidgetBounds(PRBool aRecurse, PRBool aMoveOnly, PRBool aInvalidateChangedSize);
 181   void SetPositionIgnoringChildWidgets(nscoord aX, nscoord aY);
 182   void AssertNoWindow();
 183
 184   void NotifyEffectiveVisibilityChanged(PRBool aEffectivelyVisible);
 185
 186   // Update the cached RootViewManager for all view manager descendents,
 187   // If the hierarchy is being removed, aViewManagerParent points to the view
 188   // manager for the hierarchy's old parent, and will have its mouse grab
 189   // released if it points to any view in this view hierarchy.
 190   void InvalidateHierarchy(nsViewManager *aViewManagerParent);
 191
 192   virtual ~nsView();
 193
 194   nsPoint GetOffsetTo(const nsView* aOther) const;
 195   nsIWidget* GetNearestWidget(nsPoint* aOffset) const;
 196   nsPoint GetOffsetTo(const nsView* aOther, const PRInt32 aAPD) const;
 197   nsIWidget* GetNearestWidget(nsPoint* aOffset, const PRInt32 aAPD) const;
 198
 199 protected:
 200   // Do the actual work of ResetWidgetBounds, unconditionally.  Don't
 201   // call this method if we have no widget.
 202   void DoResetWidgetBounds(PRBool aMoveOnly, PRBool aInvalidateChangedSize);
 203
 204   nsRegion*    mDirtyRegion;
 205
 206 private:
 207   void InitializeWindow(PRBool aEnableDragDrop, PRBool aResetVisibility);
 208 };
 209
 210 #endif