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136 lines
4.3 KiB
C++
136 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsGfxCheckboxControlFrame.h"
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#include "nsIContent.h"
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#include "nsCOMPtr.h"
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#include "nsRenderingContext.h"
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#include "nsIDOMHTMLInputElement.h"
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#include "nsDisplayList.h"
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#include <algorithm>
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using namespace mozilla;
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static void
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PaintCheckMark(nsIFrame* aFrame,
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nsRenderingContext* aCtx,
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const nsRect& aDirtyRect,
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nsPoint aPt)
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{
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nsRect rect(aPt, aFrame->GetSize());
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rect.Deflate(aFrame->GetUsedBorderAndPadding());
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// Points come from the coordinates on a 7X7 unit box centered at 0,0
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const int32_t checkPolygonX[] = { -3, -1, 3, 3, -1, -3 };
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const int32_t checkPolygonY[] = { -1, 1, -3, -1, 3, 1 };
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const int32_t checkNumPoints = sizeof(checkPolygonX) / sizeof(int32_t);
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const int32_t checkSize = 9; // 2 units of padding on either side
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// of the 7x7 unit checkmark
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// Scale the checkmark based on the smallest dimension
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nscoord paintScale = std::min(rect.width, rect.height) / checkSize;
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nsPoint paintCenter(rect.x + rect.width / 2,
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rect.y + rect.height / 2);
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nsPoint paintPolygon[checkNumPoints];
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// Convert checkmark for screen rendering
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for (int32_t polyIndex = 0; polyIndex < checkNumPoints; polyIndex++) {
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paintPolygon[polyIndex] = paintCenter +
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nsPoint(checkPolygonX[polyIndex] * paintScale,
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checkPolygonY[polyIndex] * paintScale);
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}
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aCtx->SetColor(aFrame->StyleColor()->mColor);
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aCtx->FillPolygon(paintPolygon, checkNumPoints);
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}
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static void
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PaintIndeterminateMark(nsIFrame* aFrame,
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nsRenderingContext* aCtx,
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const nsRect& aDirtyRect,
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nsPoint aPt)
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{
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nsRect rect(aPt, aFrame->GetSize());
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rect.Deflate(aFrame->GetUsedBorderAndPadding());
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rect.y += (rect.height - rect.height/4) / 2;
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rect.height /= 4;
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aCtx->SetColor(aFrame->StyleColor()->mColor);
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aCtx->FillRect(rect);
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}
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//------------------------------------------------------------
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nsIFrame*
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NS_NewGfxCheckboxControlFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext)
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{
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return new (aPresShell) nsGfxCheckboxControlFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsGfxCheckboxControlFrame)
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//------------------------------------------------------------
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// Initialize GFX-rendered state
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nsGfxCheckboxControlFrame::nsGfxCheckboxControlFrame(nsStyleContext* aContext)
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: nsFormControlFrame(aContext)
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{
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}
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nsGfxCheckboxControlFrame::~nsGfxCheckboxControlFrame()
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{
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}
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#ifdef ACCESSIBILITY
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a11y::AccType
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nsGfxCheckboxControlFrame::AccessibleType()
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{
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return a11y::eHTMLCheckboxType;
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}
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#endif
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//------------------------------------------------------------
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void
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nsGfxCheckboxControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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nsFormControlFrame::BuildDisplayList(aBuilder, aDirtyRect, aLists);
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// Get current checked state through content model.
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if ((!IsChecked() && !IsIndeterminate()) || !IsVisibleForPainting(aBuilder))
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return; // we're not checked or not visible, nothing to paint.
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if (IsThemed())
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return; // No need to paint the checkmark. The theme will do it.
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aLists.Content()->AppendNewToTop(new (aBuilder)
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nsDisplayGeneric(aBuilder, this,
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IsIndeterminate()
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? PaintIndeterminateMark : PaintCheckMark,
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"CheckedCheckbox",
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nsDisplayItem::TYPE_CHECKED_CHECKBOX));
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}
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//------------------------------------------------------------
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bool
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nsGfxCheckboxControlFrame::IsChecked()
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{
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nsCOMPtr<nsIDOMHTMLInputElement> elem(do_QueryInterface(mContent));
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bool retval = false;
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elem->GetChecked(&retval);
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return retval;
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}
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bool
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nsGfxCheckboxControlFrame::IsIndeterminate()
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{
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nsCOMPtr<nsIDOMHTMLInputElement> elem(do_QueryInterface(mContent));
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bool retval = false;
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elem->GetIndeterminate(&retval);
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return retval;
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}
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