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gecko/widget/public/nsIWidget.h

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/* -*- 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 "prthread.h"
#include "nsEvent.h"
#include "nsCOMPtr.h"
// forward declarations
class nsIAppShell;
class nsIToolkit;
class nsIFontMetrics;
class nsIRenderingContext;
class nsIDeviceContext;
class nsIRegion;
struct nsRect;
struct nsFont;
class nsIMenuBar;
class nsIEventListener;
class nsIRollupListener;
class nsGUIEvent;
struct nsColorMap;
class imgIContainer;
class gfxASurface;
class nsIMouseListener;
class nsIContent;
/**
* 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
#ifdef XP_MACOSX
#define NS_NATIVE_PLUGIN_PORT_QD 100
#define NS_NATIVE_PLUGIN_PORT_CG 101
#endif
// a6593177-ba36-400e-8812-a0d36b3af17b
#define NS_IWIDGET_IID \
{ 0xa6593177, 0xba36, 0x400e, \
{ 0x88, 0x12, 0xa0, 0xd3, 0x6b, 0x3a, 0xf1, 0x7b } }
// Hide the native window systems real window type so as to avoid
// including native window system types and APIs. 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_DECLARE_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.) 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(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 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 aTransparent true if the window may have translucent
* or transparent pixels
*/
NS_IMETHOD SetHasTransparentBackground(PRBool aTransparent) = 0;
/**
* Get the translucency of the top-level window that contains this
* widget.
* @param aTransparent true if the window may have translucent or
* transparent pixels
*/
NS_IMETHOD GetHasTransparentBackground(PRBool& aTransparent) = 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;
/**
* 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;
/**
* 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;
// GetDeviceContext returns a weak pointer to this widget's device context
virtual nsIDeviceContext* GetDeviceContext() = 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;
/**
* 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;
/**
* 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, 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;
/**
* 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.
*/
NS_IMETHOD SetWindowTitlebarColor(nscolor aColor) = 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;
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;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIWidget, NS_IWIDGET_IID)
#endif // nsIWidget_h__
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