/* -*- 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, eCursor_none, // 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. * Pixel RGB color values are already premultiplied with alpha channel values. * @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. * Pixel RGB color values are already premultiplied with alpha channel values. * @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 mFirstChild; nsIWidget* mLastChild; nsCOMPtr mNextSibling; nsIWidget* mPrevSibling; }; #endif // nsIWidget_h__