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- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is mozilla.org code.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
- #ifndef nsIWidget_h__
- #define nsIWidget_h__
-
- #include "nsISupports.h"
- #include "nsColor.h"
- #include "nsIMouseListener.h"
- #include "nsIMenuListener.h"
- #include "nsCoord.h"
-
- #include "prthread.h"
- #include "nsEvent.h"
- #include "nsCOMPtr.h"
-
- // forward declarations
- class nsIAppShell;
- class nsIToolkit;
- class nsIFontMetrics;
- class nsIToolkit;
- class nsIRenderingContext;
- class nsIEnumerator;
- class nsIDeviceContext;
- class nsIRegion;
- struct nsRect;
- struct nsFont;
- class nsIMenuBar;
- class nsIEventListener;
- class nsIRollupListener;
- class nsGUIEvent;
- struct nsColorMap;
- class imgIContainer;
-
- /**
- * Callback function that processes events.
- * The argument is actually a subtype (subclass) of nsEvent which carries
- * platform specific information about the event. Platform specific code knows
- * how to deal with it.
- * The return value determines whether or not the default action should take place.
- */
-
- typedef nsEventStatus (*PR_CALLBACK EVENT_CALLBACK)(nsGUIEvent *event);
-
- /**
- * Flags for the getNativeData function.
- * See getNativeData()
- */
- #define NS_NATIVE_WINDOW 0
- #define NS_NATIVE_GRAPHIC 1
- #define NS_NATIVE_COLORMAP 2
- #define NS_NATIVE_WIDGET 3
- #define NS_NATIVE_DISPLAY 4
- #define NS_NATIVE_REGION 5
- #define NS_NATIVE_OFFSETX 6
- #define NS_NATIVE_OFFSETY 7
- #define NS_NATIVE_PLUGIN_PORT 8
- #define NS_NATIVE_SCREEN 9
- #define NS_NATIVE_SHELLWIDGET 10 // Get the shell GtkWidget
-
- // e7f09105-d21b-406a-89d5-e6b731b8f665
- #define NS_IWIDGET_IID \
- { 0xe7f09105, 0xd21b, 0x406a, \
- { 0x89, 0xd5, 0xe6, 0xb7, 0x31, 0xb8, 0xf6, 0x65 } }
-
-
- // Hide the native window systems real window type so as to avoid
- // including native window system types and api's. This is necessary
- // to ensure cross-platform code.
- typedef void* nsNativeWidget;
-
- /**
- * Border styles
- */
-
- enum nsWindowType { // Don't alter previously encoded enum values - 3rd party apps may look at these
- // default top level window
- eWindowType_toplevel,
- // top level window but usually handled differently by the OS
- eWindowType_dialog,
- // used for combo boxes, etc
- eWindowType_popup,
- // child windows (contained inside a window on the desktop (has no border))
- eWindowType_child,
- // windows that are invisible or offscreen
- eWindowType_invisible,
- // plugin window
- eWindowType_plugin,
- // java plugin window
- eWindowType_java,
- // MacOSX sheet (special dialog class)
- eWindowType_sheet
- };
-
- enum nsBorderStyle
- {
- // no border, titlebar, etc.. opposite of all
- eBorderStyle_none = 0,
-
- // all window decorations
- eBorderStyle_all = 1 << 0,
-
- // enables the border on the window. these are only for decoration and are not resize hadles
- eBorderStyle_border = 1 << 1,
-
- // enables the resize handles for the window. if this is set, border is implied to also be set
- eBorderStyle_resizeh = 1 << 2,
-
- // enables the titlebar for the window
- eBorderStyle_title = 1 << 3,
-
- // enables the window menu button on the title bar. this being on should force the title bar to display
- eBorderStyle_menu = 1 << 4,
-
- // enables the minimize button so the user can minimize the window.
- // turned off for tranient windows since they can not be minimized separate from their parent
- eBorderStyle_minimize = 1 << 5,
-
- // enables the maxmize button so the user can maximize the window
- eBorderStyle_maximize = 1 << 6,
-
- // show the close button
- eBorderStyle_close = 1 << 7,
-
- // whatever the OS wants... i.e. don't do anything
- eBorderStyle_default = -1
- };
-
- /**
- * Cursor types.
- */
-
- enum nsCursor { ///(normal cursor, usually rendered as an arrow)
- eCursor_standard,
- ///(system is busy, usually rendered as a hourglass or watch)
- eCursor_wait,
- ///(Selecting something, usually rendered as an IBeam)
- eCursor_select,
- ///(can hyper-link, usually rendered as a human hand)
- eCursor_hyperlink,
- ///(north/south/west/east edge sizing)
- eCursor_n_resize,
- eCursor_s_resize,
- eCursor_w_resize,
- eCursor_e_resize,
- ///(corner sizing)
- eCursor_nw_resize,
- eCursor_se_resize,
- eCursor_ne_resize,
- eCursor_sw_resize,
- eCursor_crosshair,
- eCursor_move,
- eCursor_help,
- eCursor_copy, // CSS3
- eCursor_alias,
- eCursor_context_menu,
- eCursor_cell,
- eCursor_grab,
- eCursor_grabbing,
- eCursor_spinning,
- eCursor_zoom_in,
- eCursor_zoom_out,
- eCursor_not_allowed,
- eCursor_col_resize,
- eCursor_row_resize,
- eCursor_no_drop,
- eCursor_vertical_text,
- eCursor_all_scroll,
- eCursor_nesw_resize,
- eCursor_nwse_resize,
- eCursor_ns_resize,
- eCursor_ew_resize,
- // This one better be the last one in this list.
- eCursorCount
- };
-
- enum nsContentType {
- eContentTypeInherit = -1,
- eContentTypeUI = 0,
- eContentTypeContent = 1,
- eContentTypeContentFrame = 2
- };
-
- enum nsTopLevelWidgetZPlacement { // for PlaceBehind()
- eZPlacementBottom = 0, // bottom of the window stack
- eZPlacementBelow, // just below another widget
- eZPlacementTop // top of the window stack
- };
-
- /**
- * Basic struct for widget initialization data.
- * @see Create member function of nsIWidget
- */
-
- struct nsWidgetInitData {
- nsWidgetInitData()
- : clipChildren(PR_FALSE),
- clipSiblings(PR_FALSE),
- mDropShadow(PR_FALSE),
- mListenForResizes(PR_FALSE),
- mWindowType(eWindowType_child),
- mBorderStyle(eBorderStyle_default),
- mContentType(eContentTypeInherit),
- mUnicode(PR_TRUE)
- {
- }
-
- // when painting exclude area occupied by child windows and sibling windows
- PRPackedBool clipChildren, clipSiblings, mDropShadow;
- PRPackedBool mListenForResizes;
- nsWindowType mWindowType;
- nsBorderStyle mBorderStyle;
- nsContentType mContentType; // Exposed so screen readers know what's UI
- PRPackedBool mUnicode;
- };
-
- /**
- * The base class for all the widgets. It provides the interface for
- * all basic and necessary functionality.
- */
- class nsIWidget : public nsISupports {
-
- public:
-
- NS_DEFINE_STATIC_IID_ACCESSOR(NS_IWIDGET_IID)
-
- nsIWidget()
- : mLastChild(nsnull)
- , mPrevSibling(nsnull)
- {}
-
-
- /**
- * Create and initialize a widget.
- *
- * The widget represents a window that can be drawn into. It also is the
- * base class for user-interface widgets such as buttons and text boxes.
- *
- * All the arguments can be NULL in which case a top level window
- * with size 0 is created. The event callback function has to be
- * provided only if the caller wants to deal with the events this
- * widget receives. The event callback is basically a preprocess
- * hook called synchronously. The return value determines whether
- * the event goes to the default window procedure or it is hidden
- * to the os. The assumption is that if the event handler returns
- * false the widget does not see the event. The widget should not
- * automatically clear the window to the background color. The
- * calling code must handle paint messages and clear the background
- * itself.
- *
- * aInitData cannot be eWindowType_popup here; popups cannot be
- * hooked into the nsIWidget hierarchy.
- *
- * @param parent or null if it's a top level window
- * @param aRect the widget dimension
- * @param aHandleEventFunction the event handler callback function
- * @param aContext
- * @param aAppShell the parent application shell. If nsnull,
- * the parent window's application shell will be used.
- * @param aToolkit
- * @param aInitData data that is used for widget initialization
- *
- */
- NS_IMETHOD Create(nsIWidget *aParent,
- const nsRect &aRect,
- EVENT_CALLBACK aHandleEventFunction,
- nsIDeviceContext *aContext,
- nsIAppShell *aAppShell = nsnull,
- nsIToolkit *aToolkit = nsnull,
- nsWidgetInitData *aInitData = nsnull) = 0;
-
- /**
- * Create and initialize a widget with a native window parent
- *
- * The widget represents a window that can be drawn into. It also is the
- * base class for user-interface widgets such as buttons and text boxes.
- *
- * All the arguments can be NULL in which case a top level window
- * with size 0 is created. The event callback function has to be
- * provided only if the caller wants to deal with the events this
- * widget receives. The event callback is basically a preprocess
- * hook called synchronously. The return value determines whether
- * the event goes to the default window procedure or it is hidden
- * to the os. The assumption is that if the event handler returns
- * false the widget does not see the event.
- *
- * @param aParent native window.
- * @param aRect the widget dimension
- * @param aHandleEventFunction the event handler callback function
- */
- NS_IMETHOD Create(nsNativeWidget aParent,
- const nsRect &aRect,
- EVENT_CALLBACK aHandleEventFunction,
- nsIDeviceContext *aContext,
- nsIAppShell *aAppShell = nsnull,
- nsIToolkit *aToolkit = nsnull,
- nsWidgetInitData *aInitData = nsnull) = 0;
-
-
- /**
- * Accessor functions to get and set the client data associated with the
- * widget.
- */
- //@{
- NS_IMETHOD GetClientData(void*& aClientData) = 0;
- NS_IMETHOD SetClientData(void* aClientData) = 0;
- //@}
-
- /**
- * Close and destroy the internal native window.
- * This method does not delete the widget.
- */
-
- NS_IMETHOD Destroy(void) = 0;
-
-
- /**
- * Reparent a widget
- *
- * Change the widgets parent
- *
- * @param aNewParent new parent
- */
- NS_IMETHOD SetParent(nsIWidget* aNewParent) = 0;
-
-
- /**
- * Return the parent Widget of this Widget or nsnull if this is a
- * top level window
- *
- * @return the parent widget or nsnull if it does not have a parent
- *
- */
- virtual nsIWidget* GetParent(void) = 0;
-
- /**
- * Return the first child of this widget. Will return null if
- * there are no children.
- */
- nsIWidget* GetFirstChild() const {
- return mFirstChild;
- }
-
- /**
- * Return the last child of this widget. Will return null if
- * there are no children.
- */
- nsIWidget* GetLastChild() const {
- return mLastChild;
- }
-
- /**
- * Return the next sibling of this widget
- */
- nsIWidget* GetNextSibling() const {
- return mNextSibling;
- }
-
- /**
- * Set the next sibling of this widget
- */
- void SetNextSibling(nsIWidget* aSibling) {
- mNextSibling = aSibling;
- }
-
- /**
- * Return the previous sibling of this widget
- */
- nsIWidget* GetPrevSibling() const {
- return mPrevSibling;
- }
-
- /**
- * Set the previous sibling of this widget
- */
- void SetPrevSibling(nsIWidget* aSibling) {
- mPrevSibling = aSibling;
- }
-
- /**
- * Show or hide this widget
- *
- * @param aState PR_TRUE to show the Widget, PR_FALSE to hide it
- *
- */
- NS_IMETHOD Show(PRBool aState) = 0;
-
- /**
- * Make the window modal
- *
- */
- NS_IMETHOD SetModal(PRBool aModal) = 0;
-
- /**
- * Returns whether the window is visible
- *
- */
- NS_IMETHOD IsVisible(PRBool & aState) = 0;
-
- /**
- * Perform platform-dependent sanity check on a potential window position.
- * This is guaranteed to work only for top-level windows.
- *
- * @param aAllowSlop: if true, allow the window to slop offscreen;
- * the window should be partially visible. if false,
- * force the entire window onscreen (or at least
- * the upper-left corner, if it's too large).
- * @param aX in: an x position expressed in screen coordinates.
- * out: the x position constrained to fit on the screen(s).
- * @param aY in: an y position expressed in screen coordinates.
- * out: the y position constrained to fit on the screen(s).
- * @return vapid success indication. but see also the parameters.
- *
- **/
- NS_IMETHOD ConstrainPosition(PRBool aAllowSlop,
- PRInt32 *aX,
- PRInt32 *aY) = 0;
-
- /**
- * Move this widget.
- *
- * @param aX the new x position expressed in the parent's coordinate system
- * @param aY the new y position expressed in the parent's coordinate system
- *
- **/
- NS_IMETHOD Move(PRInt32 aX, PRInt32 aY) = 0;
-
- /**
- * Resize this widget.
- *
- * @param aWidth the new width expressed in the parent's coordinate system
- * @param aHeight the new height expressed in the parent's coordinate system
- * @param aRepaint whether the widget should be repainted
- *
- */
- NS_IMETHOD Resize(PRInt32 aWidth,
- PRInt32 aHeight,
- PRBool aRepaint) = 0;
-
- /**
- * Move or resize this widget.
- *
- * @param aX the new x position expressed in the parent's coordinate system
- * @param aY the new y position expressed in the parent's coordinate system
- * @param aWidth the new width expressed in the parent's coordinate system
- * @param aHeight the new height expressed in the parent's coordinate system
- * @param aRepaint whether the widget should be repainted if the size changes
- *
- */
- NS_IMETHOD Resize(PRInt32 aX,
- PRInt32 aY,
- PRInt32 aWidth,
- PRInt32 aHeight,
- PRBool aRepaint) = 0;
-
- /**
- * Sets the widget's z-index.
- */
- NS_IMETHOD SetZIndex(PRInt32 aZIndex) = 0;
-
- /**
- * Gets the widget's z-index.
- */
- NS_IMETHOD GetZIndex(PRInt32* aZIndex) = 0;
-
- /**
- * Position this widget just behind the given widget. (Used to
- * control z-order for top-level widgets. Get/SetZIndex by contrast
- * control z-order for child widgets of other widgets.)
- * @param aPlacement top, bottom, or below a widget
- * (if top or bottom, param aWidget is ignored)
- * @param aWidget widget to place this widget behind
- * (only if aPlacement is eZPlacementBelow).
- * null is equivalent to aPlacement of eZPlacementTop
- * @param aActivate true to activate the widget after placing it
- */
- NS_IMETHOD PlaceBehind(nsTopLevelWidgetZPlacement aPlacement,
- nsIWidget *aWidget, PRBool aActivate) = 0;
-
- /**
- * Minimize, maximize or normalize the window size.
- * Takes a value from nsSizeMode (see nsGUIEvent.h)
- */
- NS_IMETHOD SetSizeMode(PRInt32 aMode) = 0;
-
- /**
- * Return size mode (minimized, maximized, normalized).
- * Returns a value from nsSizeMode (see nsGUIEvent.h)
- */
- NS_IMETHOD GetSizeMode(PRInt32* aMode) = 0;
-
- /**
- * Enable or disable this Widget
- *
- * @param aState PR_TRUE to enable the Widget, PR_FALSE to disable it.
- *
- */
- NS_IMETHOD Enable(PRBool aState) = 0;
-
- /**
- * Ask whether the widget is enabled
- * @param aState returns PR_TRUE if the widget is enabled
- */
- NS_IMETHOD IsEnabled(PRBool *aState) = 0;
-
- /**
- * Give focus to this widget.
- */
- NS_IMETHOD SetFocus(PRBool aRaise = PR_FALSE) = 0;
-
- /**
- * Get this widget's outside dimensions relative to its parent widget
- *
- * @param aRect on return it holds the x, y, width and height of this widget
- *
- */
- NS_IMETHOD GetBounds(nsRect &aRect) = 0;
-
-
- /**
- * Get this widget's outside dimensions in global coordinates. (One might think this
- * could be accomplished by stringing together other methods in this interface, but
- * then one would bloody one's nose on different coordinate system handling by different
- * platforms.)
- *
- * @param aRect on return it holds the x, y, width and height of this widget
- *
- */
- NS_IMETHOD GetScreenBounds(nsRect &aRect) = 0;
-
-
- /**
- * Get this widget's client area dimensions, if the window has a 3D border appearance
- * this returns the area inside the border, The x and y are always zero
- *
- * @param aRect on return it holds the x. y, width and height of the client area of this widget
- *
- */
- NS_IMETHOD GetClientBounds(nsRect &aRect) = 0;
-
- /**
- * Gets the width and height of the borders
- * @param aWidth the width of the border
- * @param aHeight the height of the border
- *
- */
- NS_IMETHOD GetBorderSize(PRInt32 &aWidth, PRInt32 &aHeight) = 0;
-
- /**
- * Get the foreground color for this widget
- *
- * @return this widget's foreground color
- *
- */
- virtual nscolor GetForegroundColor(void) = 0;
-
- /**
- * Set the foreground color for this widget
- *
- * @param aColor the new foreground color
- *
- */
-
- NS_IMETHOD SetForegroundColor(const nscolor &aColor) = 0;
-
- /**
- * Get the background color for this widget
- *
- * @return this widget's background color
- *
- */
-
- virtual nscolor GetBackgroundColor(void) = 0;
-
- /**
- * Set the background color for this widget
- *
- * @param aColor the new background color
- *
- */
-
- NS_IMETHOD SetBackgroundColor(const nscolor &aColor) = 0;
-
- /**
- * Get the font for this widget
- *
- * @return the font metrics
- */
-
- virtual nsIFontMetrics* GetFont(void) = 0;
-
- /**
- * Set the font for this widget
- *
- * @param aFont font to display. See nsFont for allowable fonts
- */
-
- NS_IMETHOD SetFont(const nsFont &aFont) = 0;
-
- /**
- * Get the cursor for this widget.
- *
- * @return this widget's cursor.
- */
-
- virtual nsCursor GetCursor(void) = 0;
-
- /**
- * Set the cursor for this widget
- *
- * @param aCursor the new cursor for this widget
- */
-
- NS_IMETHOD SetCursor(nsCursor aCursor) = 0;
-
- /**
- * Sets an image as the cursor for this widget.
- *
- * @param aCursor the cursor to set
- * @param aX the X coordinate of the hotspot (from left).
- * @param aY the Y coordinate of the hotspot (from top).
- * @retval NS_ERROR_NOT_IMPLEMENTED if setting images as cursors is not
- * supported
- */
- NS_IMETHOD SetCursor(imgIContainer* aCursor,
- PRUint32 aHotspotX, PRUint32 aHotspotY) = 0;
-
- /**
- * Get the window type of this widget
- *
- * @param aWindowType the window type of the widget
- */
- NS_IMETHOD GetWindowType(nsWindowType& aWindowType) = 0;
-
- /**
- * Set the translucency of the top-level window containing this widget.
- * So, e.g., if you call this on the widget for an IFRAME, the top level
- * browser window containing the IFRAME actually gets set. Be careful.
- *
- * This can fail if the platform doesn't support
- * transparency/translucency. By default widgets are not
- * transparent. This will also fail if the toplevel window is not
- * a Mozilla window, e.g., if the widget is in an embedded
- * context.
- *
- * After translucency has been enabled, the initial alpha channel
- * value for all pixels is 1, i.e., opaque.
- * If the window is resized then the alpha channel values for
- * all pixels are reset to 1.
- * @param aTranslucent true if the window may have translucent
- * or transparent pixels
- */
- NS_IMETHOD SetWindowTranslucency(PRBool aTranslucent) = 0;
-
- /**
- * Get the translucency of the top-level window that contains this
- * widget.
- * @param aTranslucent true if the window may have translucent or
- * transparent pixels
- */
- NS_IMETHOD GetWindowTranslucency(PRBool& aTranslucent) = 0;
-
- /**
- * Update the alpha channel for some pixels of the top-level window
- * that contains this widget.
- * The window must have been made translucent using SetWindowTranslucency.
- * @param aRect the rect to update
- * @param aAlphas the alpha values, in w x h array, row-major order,
- * in units of 1/255. nsBlender::GetAlphas is a good way to compute this array.
- */
- NS_IMETHOD UpdateTranslucentWindowAlpha(const nsRect& aRect, PRUint8* aAlphas) = 0;
-
- /**
- * Hide window chrome (borders, buttons) for this widget.
- *
- */
- NS_IMETHOD HideWindowChrome(PRBool aShouldHide) = 0;
-
- /**
- * Put the toplevel window into or out of fullscreen mode.
- *
- */
- NS_IMETHOD MakeFullScreen(PRBool aFullScreen) = 0;
-
- /**
- * Validate the widget.
- *
- */
- NS_IMETHOD Validate() = 0;
-
- /**
- * Invalidate the widget and repaint it.
- *
- * @param aIsSynchronous PR_TRUE then repaint synchronously. If PR_FALSE repaint later.
- * @see #Update()
- */
-
- NS_IMETHOD Invalidate(PRBool aIsSynchronous) = 0;
-
- /**
- * Invalidate a specified rect for a widget and repaints it.
- *
- * @param aIsSynchronouse PR_TRUE then repaint synchronously. If PR_FALSE repaint later.
- * @see #Update()
- */
-
- NS_IMETHOD Invalidate(const nsRect & aRect, PRBool aIsSynchronous) = 0;
-
- /**
- * Invalidate a specified region for a widget and repaints it.
- *
- * @param aIsSynchronouse PR_TRUE then repaint synchronously. If PR_FALSE repaint later.
- * @see #Update()
- */
-
- NS_IMETHOD InvalidateRegion(const nsIRegion* aRegion, PRBool aIsSynchronous) = 0;
-
- /**
- * Force a synchronous repaint of the window if there are dirty rects.
- *
- * @see Invalidate()
- */
-
- NS_IMETHOD Update() = 0;
-
- /**
- * Adds a mouse listener to this widget
- * Any existing mouse listener is replaced
- *
- * @param aListener mouse listener to add to this widget.
- */
-
- NS_IMETHOD AddMouseListener(nsIMouseListener * aListener) = 0;
-
- /**
- * Adds an event listener to this widget
- * Any existing event listener is replaced
- *
- * @param aListener event listener to add to this widget.
- */
-
- NS_IMETHOD AddEventListener(nsIEventListener * aListener) = 0;
-
- /**
- * Adds a menu listener to this widget
- * Any existing menu listener is replaced
- *
- * @param aListener menu listener to add to this widget.
- */
-
- NS_IMETHOD AddMenuListener(nsIMenuListener * aListener) = 0;
-
- /**
- * Return the widget's toolkit
- *
- * @return the toolkit this widget was created in. See nsToolkit.
- */
-
- virtual nsIToolkit* GetToolkit() = 0;
-
- /**
- * Set the color map for this widget
- *
- * @param aColorMap color map for displaying this widget
- *
- */
-
- NS_IMETHOD SetColorMap(nsColorMap *aColorMap) = 0;
-
- /**
- * XXX (This is obsolete and will be removed soon, Use ScrollWidgets instead)
- * Scroll this widget.
- *
- * @param aDx amount to scroll along the x-axis
- * @param aDy amount to scroll along the y-axis.
- * @param aClipRect clipping rectangle to limit the scroll to.
- *
- */
-
- NS_IMETHOD Scroll(PRInt32 aDx, PRInt32 aDy, nsRect *aClipRect) = 0;
-
- /**
- * Scroll the contents of the widget.
- * All child widgets are also scrolled by offsetting their coordinates.
- * A NS_PAINT message is synchronously dispatched for the newly exposed rectangle.
- *
- * @param aDx amount to scroll along the x-axis in pixels
- * @param aDy amount to scroll along the y-axis in pixels
- *
- */
-
- NS_IMETHOD ScrollWidgets(PRInt32 aDx, PRInt32 aDy) = 0;
-
- /**
- * Scroll an area of this widget. Child widgets are not scrolled.
- * A NS_PAINT message is synchronously dispatched for the newly exposed rectangle.
- *
- * @param aRect source rectangle to scroll in the widget in pixels
- * @param aDx x offset from the source in pixels
- * @param aDy y offset from the source in pixels
- *
- */
-
- NS_IMETHOD ScrollRect(nsRect &aSrcRect, PRInt32 aDx, PRInt32 aDy) = 0;
-
- /**
- * Internal methods
- */
-
- //@{
- virtual void AddChild(nsIWidget* aChild) = 0;
- virtual void RemoveChild(nsIWidget* aChild) = 0;
- virtual void* GetNativeData(PRUint32 aDataType) = 0;
- virtual void FreeNativeData(void * data, PRUint32 aDataType) = 0;//~~~
- virtual nsIRenderingContext* GetRenderingContext() = 0;
- virtual nsIDeviceContext* GetDeviceContext() = 0;
- virtual nsIAppShell *GetAppShell() = 0;
- //@}
-
- /**
- * Set border style
- * Must be called before Create.
- * @param aBorderStyle @see nsBorderStyle
- */
-
- NS_IMETHOD SetBorderStyle(nsBorderStyle aBorderStyle) = 0;
-
- /**
- * Set the widget's title.
- * Must be called after Create.
- *
- * @param aTitle string displayed as the title of the widget
- */
-
- NS_IMETHOD SetTitle(const nsAString& aTitle) = 0;
-
- /**
- * Set the widget's icon.
- * Must be called after Create.
- *
- * @param anIconSpec string specifying the icon to use; convention is to pass
- * a resource: URL from which a platform-dependent resource
- * file name will be constructed
- */
-
- NS_IMETHOD SetIcon(const nsAString& anIconSpec) = 0;
-
- /**
- * Set the widget's MenuBar.
- * Must be called after Create.
- *
- * @param aMenuBar the menubar
- */
-
- NS_IMETHOD SetMenuBar(nsIMenuBar * aMenuBar) = 0;
-
- /**
- * Set the widget's MenuBar's visibility
- *
- * @param aShow PR_TRUE to show, PR_FALSE to hide
- */
-
- NS_IMETHOD ShowMenuBar(PRBool aShow) = 0;
-
- /**
- * Convert from this widget coordinates to screen coordinates.
- *
- * @param aOldRect widget coordinates stored in the x,y members
- * @param aNewRect screen coordinates stored in the x,y members
- */
-
- NS_IMETHOD WidgetToScreen(const nsRect& aOldRect, nsRect& aNewRect) = 0;
-
- /**
- * Convert from screen coordinates to this widget's coordinates.
- *
- * @param aOldRect screen coordinates stored in the x,y members
- * @param aNewRect widget's coordinates stored in the x,y members
- */
-
- NS_IMETHOD ScreenToWidget(const nsRect& aOldRect, nsRect& aNewRect) = 0;
-
- /**
- * When adjustments are to made to a whole set of child widgets, call this
- * before resizing/positioning the child windows to minimize repaints. Must
- * be followed by EndResizingChildren() after child windows have been
- * adjusted.
- *
- */
-
- NS_IMETHOD BeginResizingChildren(void) = 0;
-
- /**
- * Call this when finished adjusting child windows. Must be preceded by
- * BeginResizingChildren().
- *
- */
-
- NS_IMETHOD EndResizingChildren(void) = 0;
-
- /**
- * Returns the preferred width and height for the widget
- *
- */
- NS_IMETHOD GetPreferredSize(PRInt32& aWidth, PRInt32& aHeight) = 0;
-
- /**
- * Set the preferred width and height for the widget
- *
- */
- NS_IMETHOD SetPreferredSize(PRInt32 aWidth, PRInt32 aHeight) = 0;
-
- /**
- * Dispatches an event to the widget
- *
- */
- NS_IMETHOD DispatchEvent(nsGUIEvent* event, nsEventStatus & aStatus) = 0;
-
-
- /**
- * For printing and lightweight widgets
- *
- */
- NS_IMETHOD Paint(nsIRenderingContext& aRenderingContext,
- const nsRect& aDirtyRect) = 0;
-
- /**
- * Enables the dropping of files to a widget (XXX this is temporary)
- *
- */
- NS_IMETHOD EnableDragDrop(PRBool aEnable) = 0;
-
- virtual void ConvertToDeviceCoordinates(nscoord &aX,nscoord &aY) = 0;
-
- /**
- * Enables/Disables system mouse capture.
- * @param aCapture PR_TRUE enables mouse capture, PR_FALSE disables mouse capture
- *
- */
- NS_IMETHOD CaptureMouse(PRBool aCapture) = 0;
-
- /**
- * Gets the window class
- * implemented in gtk
- */
- NS_IMETHOD GetWindowClass(char *aClass) = 0;
-
- /**
- * Sets the window class
- * implemented in gtk
- */
- NS_IMETHOD SetWindowClass(char *aClass) = 0;
-
- /**
- * Enables/Disables system capture of any and all events that would cause a
- * dropdown to be rolled up, This method ignores the aConsumeRollupEvent
- * parameter when aDoCapture is FALSE
- * @param aDoCapture PR_TRUE enables capture, PR_FALSE disables capture
- * @param aConsumeRollupEvent PR_TRUE consumes the rollup event, PR_FALSE dispatches rollup event
- *
- */
- NS_IMETHOD CaptureRollupEvents(nsIRollupListener * aListener, PRBool aDoCapture, PRBool aConsumeRollupEvent) = 0;
-
- /**
- * Determine whether a given event should be processed assuming we are
- * the currently active modal window.
- * Note that the exact semantics of this method are platform-dependent.
- * The Macintosh, for instance, cares deeply that this method do exactly
- * as advertised. Gtk, for instance, handles modality in a completely
- * different fashion and does little if anything with this method.
- * @param aRealEvent event is real or a null placeholder (Macintosh)
- * @param aEvent void pointer to native event structure
- * @param aForWindow return value. PR_TRUE iff event should be processed.
- */
- NS_IMETHOD ModalEventFilter(PRBool aRealEvent, void *aEvent, PRBool *aForWindow) = 0;
-
- /**
- * Bring this window to the user's attention. This is intended to be a more
- * gentle notification than popping the window to the top or putting up an
- * alert. See, for example, Win32 FlashWindow or the NotificationManager on
- * the Mac. The notification should be suppressed if the window is already
- * in the foreground and should be dismissed when the user brings this window
- * to the foreground.
- * @param aCycleCount Maximum number of times to animate the window per system
- * conventions. If set to -1, cycles indefinitely until
- * window is brought into the foreground.
- */
- NS_IMETHOD GetAttention(PRInt32 aCycleCount) = 0;
-
- /**
- * Get the last user input event time in milliseconds. If there are any pending
- * native toolkit input events it returns the current time. All input events are
- * included (ie. it is *not* limited to events targeted at this nsIWidget instance.
- *
- * @param aTime Last user input time in milliseconds. This value can be used to compare
- * durations but can not be used for determining wall clock time. The value returned
- * is platform dependent, but is compatible with the expression
- * PR_IntervalToMicroseconds(PR_IntervalNow()).
- */
- NS_IMETHOD GetLastInputEventTime(PRUint32& aTime) = 0;
-
-
- protected:
- // keep the list of children. We also keep track of our siblings.
- // The ownership model is as follows: parent holds a strong ref to
- // the first element of the list, and each element holds a strong
- // ref to the next element in the list. The prevsibling and
- // lastchild pointers are weak, which is fine as long as they are
- // maintained properly.
- nsCOMPtr<nsIWidget> mFirstChild;
- nsIWidget* mLastChild;
- nsCOMPtr<nsIWidget> mNextSibling;
- nsIWidget* mPrevSibling;
- };
-
- #endif // nsIWidget_h__
-