/* -*- Mode: C++; tab-width: 40; 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 "nsCoord.h" #include "nsRect.h" #include "nsPoint.h" #include "nsRegion.h" #include "prthread.h" #include "nsEvent.h" #include "nsCOMPtr.h" #include "nsITheme.h" #include "nsNativeWidget.h" #include "nsWidgetInitData.h" #include "nsTArray.h" // forward declarations class nsIAppShell; class nsIToolkit; class nsIFontMetrics; class nsIRenderingContext; class nsIDeviceContext; struct nsFont; class nsIRollupListener; class nsIMenuRollup; class nsGUIEvent; class imgIContainer; class gfxASurface; class nsIContent; class ViewWrapper; namespace mozilla { namespace layers { class LayerManager; } } /** * 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 (* EVENT_CALLBACK)(nsGUIEvent *event); /** * Flags for the getNativeData function. * See getNativeData() */ #define NS_NATIVE_WINDOW 0 #define NS_NATIVE_GRAPHIC 1 #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 #ifdef XP_MACOSX #define NS_NATIVE_PLUGIN_PORT_QD 100 #define NS_NATIVE_PLUGIN_PORT_CG 101 #endif #ifdef XP_WIN #define NS_NATIVE_TSF_THREAD_MGR 100 #define NS_NATIVE_TSF_CATEGORY_MGR 101 #define NS_NATIVE_TSF_DISPLAY_ATTR_MGR 102 #endif #define NS_IWIDGET_IID \ { 0x271ac413, 0xa202, 0x46dc, \ { 0xbc, 0xd5, 0x67, 0xa1, 0xfb, 0x58, 0x89, 0x7f } } /* * Window shadow styles * Also used for the -moz-window-shadow CSS property */ #define NS_STYLE_WINDOW_SHADOW_NONE 0 #define NS_STYLE_WINDOW_SHADOW_DEFAULT 1 #define NS_STYLE_WINDOW_SHADOW_MENU 2 #define NS_STYLE_WINDOW_SHADOW_TOOLTIP 3 #define NS_STYLE_WINDOW_SHADOW_SHEET 4 /** * 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 nsTopLevelWidgetZPlacement { // for PlaceBehind() eZPlacementBottom = 0, // bottom of the window stack eZPlacementBelow, // just below another widget eZPlacementTop // top of the window stack }; /** * The base class for all the widgets. It provides the interface for * all basic and necessary functionality. */ class nsIWidget : public nsISupports { public: typedef mozilla::layers::LayerManager LayerManager; NS_DECLARE_STATIC_IID_ACCESSOR(NS_IWIDGET_IID) nsIWidget() : mLastChild(nsnull) , mPrevSibling(nsnull) {} /** * Create and initialize a widget. * * 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. * * In practice at least one of aParent and aNativeParent will be null. If * both are null the widget isn't parented (e.g. context menus or * independent top level windows). * * @param aParent parent nsIWidget * @param aNativeParent native parent widget * @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, nsNativeWidget aNativeParent, const nsIntRect &aRect, EVENT_CALLBACK aHandleEventFunction, nsIDeviceContext *aContext, nsIAppShell *aAppShell = nsnull, nsIToolkit *aToolkit = nsnull, nsWidgetInitData *aInitData = nsnull) = 0; /** * Attach to a top level widget. * * In cases where a top level chrome widget is being used as a content * container, attach a secondary event callback and update the device * context. The primary event callback will continue to be called, so the * owning base window will continue to function. * * aViewEventFunction Event callback that will receive mirrored * events. * aContext The new device context for the view */ NS_IMETHOD AttachViewToTopLevel(EVENT_CALLBACK aViewEventFunction, nsIDeviceContext *aContext) = 0; /** * Accessor functions to get and set secondary client data. Used by * nsIView in connection with AttachViewToTopLevel above. */ NS_IMETHOD SetAttachedViewPtr(ViewWrapper* aViewWrapper) = 0; virtual ViewWrapper* GetAttachedViewPtr() = 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 top level Widget of this Widget * * @return the top level widget */ virtual nsIWidget* GetTopLevelWidget() = 0; /** * Return the top (non-sheet) parent of this Widget if it's a sheet, * or nsnull if this isn't a sheet (or some other error occurred). * Sheets are only supported on some platforms (currently only OS X). * * @return the top (non-sheet) parent widget or nsnull * */ virtual nsIWidget* GetSheetWindowParent(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; /** * Resize and reposition the inner client area of the widget. * * @param aX the new x offset expressed in the parent's coordinate system * @param aY the new y offset expressed in the parent's coordinate system * @param aWidth the new width of the client area. * @param aHeight the new height of the client area. * @param aRepaint whether the widget should be repainted * */ NS_IMETHOD ResizeClient(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; /** * Request activation of this window or give focus to this widget. * * @param aRaise If PR_TRUE, this function requests activation of this * widget's toplevel window. * If PR_FALSE, the appropriate toplevel window (which in * the case of popups may not be this widget's toplevel * window) is already active, and this function indicates * that keyboard events should be reported through the * aHandleEventFunction provided to this->Create(). */ 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(nsIntRect &aRect) = 0; /** * Get this widget's outside dimensions in global coordinates. This * includes any title bar on the window. * * @param aRect On return it holds the x, y, width and height of * this widget. */ NS_IMETHOD GetScreenBounds(nsIntRect &aRect) = 0; /** * Get this widget's client area dimensions, if the window has a 3D * border appearance this returns the area inside the border. Origin * is always zero. * * @param aRect On return it holds the x. y, width and height of * the client area of this widget. */ NS_IMETHOD GetClientBounds(nsIntRect &aRect) = 0; /** * Get the non-client area dimensions of the window. * */ NS_IMETHOD GetNonClientMargins(nsIntMargin &margins) = 0; /** * Sets the non-client area dimensions of the window. Pass -1 to restore * the system default frame size for that border. Pass zero to remove * a border, or pass a specific value adjust a border. Units are in * pixels. (DPI dependent) * * Platform notes: * Windows: shrinking top non-client height will remove application * icon and window title text. Glass desktops will refuse to set * dimensions between zero and size < system default. * */ NS_IMETHOD SetNonClientMargins(nsIntMargin &margins) = 0; /** * Get the client offset from the window origin. * * @param aPt on return it holds the width and height of the offset. * */ NS_IMETHOD GetClientOffset(nsIntPoint &aPt) = 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 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 transparency mode 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/glass. 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 transparency/glass 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. */ virtual void SetTransparencyMode(nsTransparencyMode aMode) = 0; /** * Get the transparency mode of the top-level window that contains this * widget. */ virtual nsTransparencyMode GetTransparencyMode() = 0; /** * Updates a region of the window that might not have opaque content drawn. Widgets should * assume that the initial possibly transparent region is empty. * * @param aDirtyRegion the region of the window that aMaybeTransparentRegion pertains to * @param aPossiblyTransparentRegion the region of the window that is possibly transparent */ virtual void UpdatePossiblyTransparentRegion(const nsIntRegion &aDirtyRegion, const nsIntRegion &aPossiblyTransparentRegion) {}; /** * This represents a command to set the bounds and clip region of * a child widget. */ struct Configuration { nsIWidget* mChild; nsIntRect mBounds; nsTArray mClipRegion; }; /** * Sets the clip region of each mChild (which must actually be a child * of this widget) to the union of the pixel rects given in * mClipRegion, all relative to the top-left of the child * widget. Clip regions are not implemented on all platforms and only * need to actually work for children that are plugins. * * Also sets the bounds of each child to mBounds. * * This will invalidate areas of the children that have changed, but * does not need to invalidate any part of this widget. */ virtual nsresult ConfigureChildren(const nsTArray& aConfigurations) = 0; /** * Appends to aRects the rectangles constituting this widget's clip * region. If this widget is not clipped, appends a single rectangle * (0, 0, bounds.width, bounds.height). */ virtual void GetWindowClipRegion(nsTArray* aRects) = 0; /** * Set the shadow style of the window. * * Ignored on child widgets and on non-Mac platforms. */ NS_IMETHOD SetWindowShadowStyle(PRInt32 aStyle) = 0; /* * On Mac OS X, this method shows or hides the pill button in the titlebar * that's used to collapse the toolbar. * * Ignored on child widgets and on non-Mac platforms. */ virtual void SetShowsToolbarButton(PRBool aShow) = 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; /** * 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 nsIntRect & aRect, PRBool aIsSynchronous) = 0; /** * Force a synchronous repaint of the window if there are dirty rects. * * @see Invalidate() */ NS_IMETHOD Update() = 0; /** * Return the widget's toolkit * * An AddRef has NOT been done for the caller. * * @return the toolkit this widget was created in. See nsToolkit. */ virtual nsIToolkit* GetToolkit() = 0; /** * Return the widget's LayerManager. The layer tree for that * LayerManager is what gets rendered to the widget. * The layer manager is guaranteed to be the same for the lifetime * of the widget. */ virtual LayerManager* GetLayerManager() = 0; /** * Scroll a set of rectangles in this widget and (as simultaneously as * possible) modify the specified child widgets. * * This will invalidate areas of the children that have changed, unless * they have just moved by the scroll amount, but does not need to * invalidate any part of this widget, except where the scroll * operation fails to blit because part of the window is unavailable * (e.g. partially offscreen). * * The caller guarantees that the rectangles in aDestRects are * non-intersecting. * * @param aDelta amount to scroll (device pixels) * @param aDestRects rectangles to copy into * (device pixels relative to this widget) * @param aReconfigureChildren commands to set the bounds and clip * region of a subset of the children of this widget; these should * be performed simultaneously with the scrolling, as far as possible, * to avoid visual artifacts. */ virtual void Scroll(const nsIntPoint& aDelta, const nsTArray& aDestRects, const nsTArray& aReconfigureChildren) = 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;//~~~ // GetDeviceContext returns a weak pointer to this widget's device context virtual nsIDeviceContext* GetDeviceContext() = 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; /** * Return this widget's origin in screen coordinates. * * @return screen coordinates stored in the x,y members */ virtual nsIntPoint WidgetToScreenOffset() = 0; /** * Dispatches an event to the widget * */ NS_IMETHOD DispatchEvent(nsGUIEvent* event, nsEventStatus & aStatus) = 0; /** * Enables the dropping of files to a widget (XXX this is temporary) * */ NS_IMETHOD EnableDragDrop(PRBool aEnable) = 0; /** * Enables/Disables system mouse capture. * @param aCapture PR_TRUE enables mouse capture, PR_FALSE disables mouse capture * */ NS_IMETHOD CaptureMouse(PRBool aCapture) = 0; /** * Classify the window for the window manager. Mostly for X11. */ NS_IMETHOD SetWindowClass(const nsAString& xulWinType) = 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, nsIMenuRollup * aMenuRollup, PRBool aDoCapture, PRBool aConsumeRollupEvent) = 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; /** * Ask whether there user input events pending. All input events are * included, including those not targeted at this nsIwidget instance. */ virtual PRBool HasPendingInputEvent() = 0; /** * Called when when we need to begin secure keyboard input, such as when a password field * gets focus. * * NOTE: Calls to this method may not be nested and you can only enable secure keyboard input * for one widget at a time. */ NS_IMETHOD BeginSecureKeyboardInput() = 0; /** * Called when when we need to end secure keyboard input, such as when a password field * loses focus. * * NOTE: Calls to this method may not be nested and you can only enable secure keyboard input * for one widget at a time. */ NS_IMETHOD EndSecureKeyboardInput() = 0; /** * Set the background color of the window titlebar for this widget. On Mac, * for example, this will remove the grey gradient and bottom border and * instead show a single, solid color. * * Ignored on any platform that does not support it. Ignored by widgets that * do not represent windows. * * @param aColor The color to set the title bar background to. Alpha values * other than fully transparent (0) are respected if possible * on the platform. An alpha of 0 will cause the window to * draw with the default style for the platform. * * @param aActive Whether the color should be applied to active or inactive * windows. */ NS_IMETHOD SetWindowTitlebarColor(nscolor aColor, PRBool aActive) = 0; /** * If set to true, the window will draw its contents into the titlebar * instead of below it. * * Ignored on any platform that does not support it. Ignored by widgets that * do not represent windows. * May result in a resize event, so should only be called from places where * reflow and painting is allowed. * * @param aState Whether drawing into the titlebar should be activated. */ virtual void SetDrawsInTitlebar(PRBool aState) = 0; /* * Determine whether the widget shows a resize widget. If it does, * aResizerRect returns the resizer's rect. * * Returns false on any platform that does not support it. * * @param aResizerRect The resizer's rect in device pixels. * @return Whether a resize widget is shown. */ virtual PRBool ShowsResizeIndicator(nsIntRect* aResizerRect) = 0; /** * Get the Thebes surface associated with this widget. */ virtual gfxASurface *GetThebesSurface() = 0; /** * Return the popup that was last rolled up, or null if there isn't one. */ virtual nsIContent* GetLastRollup() = 0; /** * Begin a window resizing drag, based on the event passed in. */ NS_IMETHOD BeginResizeDrag(nsGUIEvent* aEvent, PRInt32 aHorizontal, PRInt32 aVertical) = 0; enum Modifiers { CAPS_LOCK = 0x01, // when CapsLock is active NUM_LOCK = 0x02, // when NumLock is active SHIFT_L = 0x0100, SHIFT_R = 0x0200, CTRL_L = 0x0400, CTRL_R = 0x0800, ALT_L = 0x1000, // includes Option ALT_R = 0x2000, COMMAND_L = 0x4000, COMMAND_R = 0x8000, HELP = 0x10000, FUNCTION = 0x100000, NUMERIC_KEY_PAD = 0x01000000 // when the key is coming from the keypad }; /** * Utility method intended for testing. Dispatches native key events * to this widget to simulate the press and release of a key. * @param aNativeKeyboardLayout a *platform-specific* constant. * On Mac, this is the resource ID for a 'uchr' or 'kchr' resource. * On Windows, it is converted to a hex string and passed to * LoadKeyboardLayout, see * http://msdn.microsoft.com/en-us/library/ms646305(VS.85).aspx * @param aNativeKeyCode a *platform-specific* keycode. * On Windows, this is the virtual key code. * @param aModifiers some combination of the above 'Modifiers' flags; * not all flags will apply to all platforms. Mac ignores the _R * modifiers. Windows ignores COMMAND, NUMERIC_KEY_PAD, HELP and * FUNCTION. * @param aCharacters characters that the OS would decide to generate * from the event. On Windows, this is the charCode passed by * WM_CHAR. * @param aUnmodifiedCharacters characters that the OS would decide * to generate from the event if modifier keys (other than shift) * were assumed inactive. Needed on Mac, ignored on Windows. * @return NS_ERROR_NOT_AVAILABLE to indicate that the keyboard * layout is not supported and the event was not fired */ virtual nsresult SynthesizeNativeKeyEvent(PRInt32 aNativeKeyboardLayout, PRInt32 aNativeKeyCode, PRUint32 aModifierFlags, const nsAString& aCharacters, const nsAString& aUnmodifiedCharacters) = 0; /** * Utility method intended for testing. Dispatches native mouse events * may even move the mouse cursor. On Mac the events are guaranteed to * be sent to the window containing this widget, but on Windows they'll go * to whatever's topmost on the screen at that position, so for * cross-platform testing ensure that your window is at the top of the * z-order. * @param aPoint screen location of the mouse, in device * pixels, with origin at the top left * @param aNativeMessage *platform-specific* event type (e.g. on Mac, * NSMouseMoved; on Windows, MOUSEEVENTF_MOVE, MOUSEEVENTF_LEFTDOWN etc) * @param aModifierFlags *platform-specific* modifier flags (ignored * on Windows) */ virtual nsresult SynthesizeNativeMouseEvent(nsIntPoint aPoint, PRUint32 aNativeMessage, PRUint32 aModifierFlags) = 0; /** * Activates a native menu item at the position specified by the index * string. The index string is a string of positive integers separated * by the "|" (pipe) character. The last integer in the string represents * the item index in a submenu located using the integers preceding it. * * Example: 1|0|4 * In this string, the first integer represents the top-level submenu * in the native menu bar. Since the integer is 1, it is the second submeu * in the native menu bar. Within that, the first item (index 0) is a * submenu, and we want to activate the 5th item within that submenu. */ virtual nsresult ActivateNativeMenuItemAt(const nsAString& indexString) = 0; /** * This is used for native menu system testing. * * Updates a native menu at the position specified by the index string. * The index string is a string of positive integers separated by the "|" * (pipe) character. * * Example: 1|0|4 * In this string, the first integer represents the top-level submenu * in the native menu bar. Since the integer is 1, it is the second submeu * in the native menu bar. Within that, the first item (index 0) is a * submenu, and we want to update submenu at index 4 within that submenu. * * If this is called with an empty string it forces a full reload of the * menu system. */ virtual nsresult ForceUpdateNativeMenuAt(const nsAString& indexString) = 0; /* * Force Input Method Editor to commit the uncommitted input */ NS_IMETHOD ResetInputState()=0; /* * Following methods relates to IME 'Opened'/'Closed' state. * 'Opened' means the user can input any character. I.e., users can input Japanese * and other characters. The user can change the state to 'Closed'. * 'Closed' means the user can input ASCII characters only. This is the same as a * non-IME environment. The user can change the state to 'Opened'. * For more information is here. * http://bugzilla.mozilla.org/show_bug.cgi?id=16940#c48 */ /* * Set the state to 'Opened' or 'Closed'. * If aState is TRUE, IME open state is set to 'Opened'. * If aState is FALSE, set to 'Closed'. */ NS_IMETHOD SetIMEOpenState(PRBool aState) = 0; /* * Get IME is 'Opened' or 'Closed'. * If IME is 'Opened', aState is set PR_TRUE. * If IME is 'Closed', aState is set PR_FALSE. */ NS_IMETHOD GetIMEOpenState(PRBool* aState) = 0; /* * IME enabled states, the aState value of SetIMEEnabled/GetIMEEnabled * should be one value of following values. * * WARNING: If you change these values, you also need to edit: * nsIDOMWindowUtils.idl * nsDOMWindowUtils::SetIMEEnabled * nsContentUtils::GetWidgetStatusFromIMEStatus */ enum IMEStatus { /* * 'Disabled' means the user cannot use IME. So, the open state should be * 'closed' during 'disabled'. */ IME_STATUS_DISABLED = 0, /* * 'Enabled' means the user can use IME. */ IME_STATUS_ENABLED = 1, /* * 'Password' state is a special case for the password editors. * E.g., on mac, the password editors should disable the non-Roman * keyboard layouts at getting focus. Thus, the password editor may have * special rules on some platforms. */ IME_STATUS_PASSWORD = 2, /* * This state is used when a plugin is focused. * When a plug-in is focused content, we should send native events * directly. Because we don't process some native events, but they may * be needed by the plug-in. */ IME_STATUS_PLUGIN = 3 }; /* * Set the state to 'Enabled' or 'Disabled' or 'Password'. */ NS_IMETHOD SetIMEEnabled(PRUint32 aState) = 0; /* * Get IME is 'Enabled' or 'Disabled' or 'Password'. */ NS_IMETHOD GetIMEEnabled(PRUint32* aState) = 0; /* * Destruct and don't commit the IME composition string. */ NS_IMETHOD CancelIMEComposition() = 0; /** * Set accelerated rendering to 'True' or 'False' */ NS_IMETHOD SetAcceleratedRendering(PRBool aEnabled) = 0; /* * Get toggled key states. * aKeyCode should be NS_VK_CAPS_LOCK or NS_VK_NUM_LOCK or * NS_VK_SCROLL_LOCK. * aLEDState is the result for current LED state of the key. * If the LED is 'ON', it returns TRUE, otherwise, FALSE. * If the platform doesn't support the LED state (or we cannot get the * state), this method returns NS_ERROR_NOT_IMPLEMENTED. */ NS_IMETHOD GetToggledKeyState(PRUint32 aKeyCode, PRBool* aLEDState) = 0; /* * An editable node (i.e. input/textarea/design mode document) * is receiving or giving up focus * aFocus is true if node is receiving focus * aFocus is false if node is giving up focus (blur) * * If this returns NS_ERROR_*, OnIMETextChange and OnIMESelectionChange * and OnIMEFocusChange(PR_FALSE) will be never called. */ NS_IMETHOD OnIMEFocusChange(PRBool aFocus) = 0; /* * Text content of the focused node has changed * aStart is the starting offset of the change * aOldEnd is the ending offset of the change * aNewEnd is the caret offset after the change */ NS_IMETHOD OnIMETextChange(PRUint32 aStart, PRUint32 aOldEnd, PRUint32 aNewEnd) = 0; /* * Selection has changed in the focused node */ NS_IMETHOD OnIMESelectionChange(void) = 0; /* * Call this method when a dialog is opened which has a default button. * The button's rectangle should be supplied in aButtonRect. */ NS_IMETHOD OnDefaultButtonLoaded(const nsIntRect &aButtonRect) = 0; /** * Compute the overridden system mouse scroll speed on the root content of * web pages. The widget may set the same value as aOriginalDelta. E.g., * when the system scrolling settings were customized, widget can respect * the will of the user. * * This is called only when the mouse wheel event scrolls the root content * of the web pages by line. In other words, this isn't called when the * mouse wheel event is used for zoom, page scroll and other special * actions. And also this isn't called when the user doesn't use the * system wheel speed settings. * * @param aOriginalDelta The delta value of the current mouse wheel * scrolling event. * @param aIsHorizontal If TRUE, the scrolling direction is horizontal. * Otherwise, it's vertical. * @param aOverriddenDelta The overridden mouse scrolling speed. This value * may be same as aOriginalDelta. */ NS_IMETHOD OverrideSystemMouseScrollSpeed(PRInt32 aOriginalDelta, PRBool aIsHorizontal, PRInt32 &aOverriddenDelta) = 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; }; NS_DEFINE_STATIC_IID_ACCESSOR(nsIWidget, NS_IWIDGET_IID) #endif // nsIWidget_h__