gecko-dev/layout/forms/nsGfxRadioControlFrame.cpp
2006-07-13 05:05:54 +00:00

222 lines
7.7 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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 of 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 ***** */
#include "nsGfxRadioControlFrame.h"
#include "nsIContent.h"
#include "nsCOMPtr.h"
#include "nsCSSRendering.h"
#ifdef ACCESSIBILITY
#include "nsIAccessibilityService.h"
#endif
#include "nsIServiceManager.h"
#include "nsITheme.h"
#include "nsDisplayList.h"
nsIFrame*
NS_NewGfxRadioControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsGfxRadioControlFrame(aContext);
}
nsGfxRadioControlFrame::nsGfxRadioControlFrame(nsStyleContext* aContext):
nsFormControlFrame(aContext)
{
}
nsGfxRadioControlFrame::~nsGfxRadioControlFrame()
{
}
// Frames are not refcounted, no need to AddRef
NS_IMETHODIMP
nsGfxRadioControlFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_PRECONDITION(0 != aInstancePtr, "null ptr");
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(NS_GET_IID(nsIRadioControlFrame))) {
*aInstancePtr = (void*) ((nsIRadioControlFrame*) this);
return NS_OK;
}
return nsFormControlFrame::QueryInterface(aIID, aInstancePtr);
}
#ifdef ACCESSIBILITY
NS_IMETHODIMP nsGfxRadioControlFrame::GetAccessible(nsIAccessible** aAccessible)
{
nsCOMPtr<nsIAccessibilityService> accService = do_GetService("@mozilla.org/accessibilityService;1");
if (accService) {
return accService->CreateHTMLRadioButtonAccessible(NS_STATIC_CAST(nsIFrame*, this), aAccessible);
}
return NS_ERROR_FAILURE;
}
#endif
//--------------------------------------------------------------
nsStyleContext*
nsGfxRadioControlFrame::GetAdditionalStyleContext(PRInt32 aIndex) const
{
switch (aIndex) {
case NS_GFX_RADIO_CONTROL_FRAME_FACE_CONTEXT_INDEX:
return mRadioButtonFaceStyle;
break;
default:
return nsnull;
}
}
//--------------------------------------------------------------
void
nsGfxRadioControlFrame::SetAdditionalStyleContext(PRInt32 aIndex,
nsStyleContext* aStyleContext)
{
switch (aIndex) {
case NS_GFX_RADIO_CONTROL_FRAME_FACE_CONTEXT_INDEX:
mRadioButtonFaceStyle = aStyleContext;
break;
}
}
//--------------------------------------------------------------
NS_IMETHODIMP
nsGfxRadioControlFrame::SetRadioButtonFaceStyleContext(nsStyleContext *aRadioButtonFaceStyleContext)
{
mRadioButtonFaceStyle = aRadioButtonFaceStyleContext;
return NS_OK;
}
//--------------------------------------------------------------
void
nsGfxRadioControlFrame::PaintRadioButtonFromStyle(
nsIRenderingContext& aRenderingContext, nsPoint aPt, const nsRect& aDirtyRect)
{
const nsStyleBorder* myBorder = mRadioButtonFaceStyle->GetStyleBorder();
// Paint the button for the radio button using CSS background rendering code
const nsStyleBackground* myColor = mRadioButtonFaceStyle->GetStyleBackground();
const nsStyleColor* color = mRadioButtonFaceStyle->GetStyleColor();
const nsStylePadding* myPadding = mRadioButtonFaceStyle->GetStylePadding();
const nsStylePosition* myPosition = mRadioButtonFaceStyle->GetStylePosition();
nscoord width = myPosition->mWidth.GetCoordValue();
nscoord height = myPosition->mHeight.GetCoordValue();
// Position the button centered within the radio control's rectangle.
nscoord x = (mRect.width - width) / 2;
nscoord y = (mRect.height - height) / 2;
nsRect rect = nsRect(x, y, width, height) + aPt;
// So we will use PaintBackgroundWithSC to paint the dot,
// but it uses the mBackgroundColor for painting and we need to use the mColor
// so create a temporary style color struct and set it up appropriately
// XXXldb It would make more sense to use
// |aRenderingContext.FillEllipse| here, but on at least GTK that
// doesn't draw a round enough circle.
nsStyleBackground tmpColor = *myColor;
tmpColor.mBackgroundColor = color->mColor;
nsPresContext* pc = GetPresContext();
nsCSSRendering::PaintBackgroundWithSC(pc, aRenderingContext,
this, aDirtyRect, rect,
tmpColor, *myBorder, *myPadding, PR_FALSE);
nsCSSRendering::PaintBorder(pc, aRenderingContext, this,
aDirtyRect, rect, *myBorder, mRadioButtonFaceStyle, 0);
}
class nsDisplayRadioButtonFromStyle : public nsDisplayItem {
public:
nsDisplayRadioButtonFromStyle(nsGfxRadioControlFrame* aFrame)
: nsDisplayItem(aFrame) {
MOZ_COUNT_CTOR(nsDisplayRadioButtonFromStyle);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayRadioButtonFromStyle() {
MOZ_COUNT_DTOR(nsDisplayRadioButtonFromStyle);
}
#endif
virtual void Paint(nsDisplayListBuilder* aBuilder, nsIRenderingContext* aCtx,
const nsRect& aDirtyRect);
NS_DISPLAY_DECL_NAME("RadioButton")
};
void
nsDisplayRadioButtonFromStyle::Paint(nsDisplayListBuilder* aBuilder,
nsIRenderingContext* aCtx, const nsRect& aDirtyRect) {
NS_STATIC_CAST(nsGfxRadioControlFrame*, mFrame)->
PaintRadioButtonFromStyle(*aCtx, aBuilder->ToReferenceFrame(mFrame), aDirtyRect);
}
//--------------------------------------------------------------
NS_IMETHODIMP
nsGfxRadioControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
nsresult rv = nsFormControlFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
NS_ENSURE_SUCCESS(rv, rv);
if (!IsVisibleForPainting(aBuilder))
return NS_OK;
if (IsThemed())
return NS_OK; // No need to paint the radio button. The theme will do it.
if (!mRadioButtonFaceStyle)
return NS_OK;
PRBool checked = PR_TRUE;
GetCurrentCheckState(&checked); // Get check state from the content model
if (!checked)
return NS_OK;
return aLists.Content()->AppendNewToTop(new (aBuilder)
nsDisplayRadioButtonFromStyle(this));
}
//--------------------------------------------------------------
NS_IMETHODIMP
nsGfxRadioControlFrame::OnChecked(nsPresContext* aPresContext,
PRBool aChecked)
{
Invalidate(GetOverflowRect(), PR_FALSE);
return NS_OK;
}