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gecko-dev/widget/public/nsIWidget.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsIWidget_h__
#define nsIWidget_h__
#include "nsISupports.h"
#include "nsColor.h"
#include "nsIMouseListener.h"
#include "nsIMenuListener.h"
#include "nsIImage.h"
#include "prthread.h"
#include "nsGUIEvent.h"
// forward declarations
class nsIAppShell;
class nsIToolkit;
class nsIFontMetrics;
class nsIToolkit;
class nsIRenderingContext;
class nsIEnumerator;
class nsIDeviceContext;
struct nsRect;
struct nsFont;
class nsIMenuBar;
class nsIEventListener;
/**
* 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
// {18032AD5-B265-11d1-AA2A-000000000000}
#define NS_IWIDGET_IID \
{ 0x18032ad5, 0xb265, 0x11d1, \
{ 0xaa, 0x2a, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 } }
// The following definition should have been temporary. The plan was to create
// a new class called "nsIWindow" and use it on all the platforms in order
// to differentiate real user windows from simple widgets. The Mac needs it
// and it appeared that it would make sense to have it on Windows and Unix too.
// Well, it did not happen yet so we keep this temporary definition.
#ifdef XP_MAC
// {18032AD6-B265-11d1-AA2A-000000000000}
#define NS_IWINDOW_IID \
{ 0x18032ad6, 0xb265, 0x11d1, \
{ 0xaa, 0x2a, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 } }
#else
#define NS_IWINDOW_IID NS_IWIDGET_IID
#endif
// 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 nsBorderStyle {
///no border
eBorderStyle_none,
///dialog box border + title area
eBorderStyle_dialog,
///window border
eBorderStyle_window,
///child window 3D border hint
eBorderStyle_3DChildWindow
};
/**
* 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,
///(west/east sizing, usually rendered as ->||<-)
eCursor_sizeWE,
///(north/south sizing, usually rendered as sizeWE rotated 90 degrees)
eCursor_sizeNS,
eCursor_arrow_north,
eCursor_arrow_north_plus,
eCursor_arrow_south,
eCursor_arrow_south_plus,
eCursor_arrow_west,
eCursor_arrow_west_plus,
eCursor_arrow_east,
eCursor_arrow_east_plus
};
/**
* Basic struct for widget initialization data.
* @see Create member function of nsIWidget
*/
struct nsWidgetInitData {
nsWidgetInitData()
: clipChildren(PR_FALSE), clipSiblings(PR_FALSE),
mBorderStyle(eBorderStyle_window)
{
}
// when painting exclude area occupied by child windows and sibling windows
PRPackedBool clipChildren, clipSiblings;
nsBorderStyle mBorderStyle;
};
/**
* The base class for all the widgets. It provides the interface for
* all basic and necessary functionality.
*/
class nsIWidget : public nsISupports {
public:
static const nsIID& GetIID() { static nsIID iid = NS_IWIDGET_IID; return iid; }
/**
* 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.
*
* @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;
/**
* 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 an nsEnumerator over the children of this widget.
*
* @return an enumerator over the list of children or nsnull if it does not
* have any children
*
*/
virtual nsIEnumerator* GetChildren(void) = 0;
/**
* Show or hide this widget
*
* @param aState PR_TRUE to show the Widget, PR_FALSE to hide it
*
*/
NS_IMETHOD Show(PRBool aState) = 0;
/**
* Returns whether the window is visible
*
*/
NS_IMETHOD IsVisible(PRBool & aState) = 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(PRUint32 aX, PRUint32 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(PRUint32 aWidth,
PRUint32 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(PRUint32 aX,
PRUint32 aY,
PRUint32 aWidth,
PRUint32 aHeight,
PRBool aRepaint) = 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;
/**
* Give focus to this widget.
*/
NS_IMETHOD SetFocus(void) = 0;
/**
* Get this widget's dimension outside dimensions, or in otherswords
* the dimensions of the widget or window
*
* @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 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;
/**
* Invalidate the widget and repaint it.
*
* @param aIsSynchronouse 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;
/**
* 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;
/**
* 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;
/**
* Internal methods
*/
//@{
virtual void AddChild(nsIWidget* aChild) = 0;
virtual void RemoveChild(nsIWidget* aChild) = 0;
virtual void* GetNativeData(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 nsString& aTitle) = 0;
/**
* Set the widget's MenuBar.
* Must be called after Create.
*
* @param aTitle string displayed as the title of the widget
*/
NS_IMETHOD SetMenuBar(nsIMenuBar * aMenuBar) = 0;
/**
* Set the collection of tooltip rectangles.
* A NS_SHOW_TOOLTIP event is generated when the mouse hovers over one
* of the rectangles. a NS_HIDE_TOOLTIP event is generated when the mouse
* is moved or a new tooltip is displayed.
*
* @param aNumberOfTips number of tooltip areas.
* @param aTooltipArea array of x,y,width,height rectangles specifying hot areas
*
*/
NS_IMETHOD SetTooltips(PRUint32 aNumberOfTips,nsRect* aTooltipAreas[]) = 0;
/**
* Update the collection of tooltip rectangles. The number of tooltips must
* match the original number of tooltips specified in SetTooltips. Must be called
* after calling SetTooltips.
*
* @param aNewTips array of x,y,width,height rectangles specifying the new hot areas
*
*/
NS_IMETHOD UpdateTooltips(nsRect* aNewTips[]) = 0;
/**
* Remove the collection of tooltip rectangles.
*/
NS_IMETHOD RemoveTooltips() = 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 and event to the widget
*
*/
NS_IMETHOD DispatchEvent(nsGUIEvent* event, nsEventStatus & aStatus) = 0;
/**
* FSets the vertical scrollbar widget
*
*/
NS_IMETHOD SetVerticalScrollbar(nsIWidget * aScrollbar) = 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 EnableFileDrop(PRBool aEnable) = 0;
virtual void ConvertToDeviceCoordinates(nscoord &aX,nscoord &aY) = 0;
};
#endif // nsIWidget_h__
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