C++ paintButton函数代码示例

void handlePointerMotion(AppInfo *app, XEvent *event)
{
   DialogInfo *d = app->dialog;
   
   if (NO_BUTTON == d->pressedButton) {
      return;
   } else if (OK_BUTTON == d->pressedButton) {
      if (eventIsInsideButton(app, event, d->okButton)) {
	 if (!(d->okButton.pressed)) {
	    d->okButton.pressed = True;
	    paintButton(app, d->dialogWindow, d->okButton);
	 }
      } else {
	 if (d->okButton.pressed) {
	    d->okButton.pressed = False;
	    paintButton(app, d->dialogWindow, d->okButton);
	 }
      }
   } else if (CANCEL_BUTTON == d->pressedButton) {
      if (eventIsInsideButton(app, event, d->cancelButton)) {
	 if (!(d->cancelButton.pressed)) {
	    d->cancelButton.pressed = True;
	    paintButton(app, d->dialogWindow, d->cancelButton);
	 }
      } else {
	 if (d->cancelButton.pressed) {
	    d->cancelButton.pressed = False;
	    paintButton(app, d->dialogWindow, d->cancelButton);
	 }
      }
   }
}

bool RenderThemeGtk::paintMenuList(RenderObject* object, const PaintInfo& info, const IntRect& rect)
{
    if (paintButton(object, info, rect))
        return true;

    // Menu list button painting strategy.
    // For buttons with appears-as-list set to false (having a separator):
    // | left border | Button text | xthickness | vseparator | xthickness | arrow | xthickness | right border |
    // For buttons with appears-as-list set to true (not having a separator):
    // | left border | Button text | arrow | xthickness | right border |

    int leftBorder = 0, rightBorder = 0, bottomBorder = 0, topBorder = 0;
    getButtonInnerBorder(gtkComboBoxButton(), leftBorder, topBorder, rightBorder, bottomBorder);
    RenderStyle* style = &object->style();
    int arrowSize = comboBoxArrowSize(style);
    GtkStyle* buttonStyle = gtk_widget_get_style(gtkComboBoxButton());

    IntRect arrowRect(0, (rect.height() - arrowSize) / 2, arrowSize, arrowSize);
    if (style->direction() == RTL)
        arrowRect.setX(leftBorder + buttonStyle->xthickness);
    else
        arrowRect.setX(rect.width() - rightBorder - buttonStyle->xthickness - arrowSize);
    GtkShadowType shadowType = isPressed(object) ? GTK_SHADOW_IN : GTK_SHADOW_OUT;

    WidgetRenderingContext widgetContext(info.context, rect);
    GtkStateType stateType = getGtkStateType(this, object);
    widgetContext.gtkPaintArrow(arrowRect, gtkComboBoxArrow(), stateType, shadowType, GTK_ARROW_DOWN, "arrow");

    // Some combo boxes do not have a separator.
    GtkWidget* separator = gtkComboBoxSeparator();
    if (!separator)
        return false;

    // We want to decrease the height of the separator based on the focus padding of the button.
    gint focusPadding = 0, focusWidth = 0; 
    gtk_widget_style_get(gtkComboBoxButton(),
                         "focus-line-width", &focusWidth,
                         "focus-padding", &focusPadding, NULL);
    topBorder += focusPadding + focusWidth;
    bottomBorder += focusPadding + focusWidth;
    int separatorWidth = getComboBoxSeparatorWidth();
    IntRect separatorRect(0, topBorder, separatorWidth, rect.height() - topBorder - bottomBorder);
    if (style->direction() == RTL)
        separatorRect.setX(arrowRect.x() + arrowRect.width() + buttonStyle->xthickness + separatorWidth);
    else
        separatorRect.setX(arrowRect.x() - buttonStyle->xthickness - separatorWidth);

    gboolean hasWideSeparators = FALSE;
    gtk_widget_style_get(separator, "wide-separators", &hasWideSeparators, NULL);
    if (hasWideSeparators)
        widgetContext.gtkPaintBox(separatorRect, separator, GTK_STATE_NORMAL, GTK_SHADOW_ETCHED_OUT, "vseparator");
    else
        widgetContext.gtkPaintVLine(separatorRect, separator, GTK_STATE_NORMAL, "vseparator");

    return false;
}

void handleButtonPress(AppInfo *app, XEvent *event)
{
   DialogInfo *d = app->dialog;

   cancelInputTimeout(app);
   if (event->xbutton.button != Button1) {
      return;
   }
   if (ButtonPress == event->type) {
      if (eventIsInsideButton(app, event, d->okButton)) {
	 d->pressedButton = OK_BUTTON;
	 d->okButton.pressed = True;
	 paintButton(app, d->dialogWindow, d->okButton);
      } else if (eventIsInsideButton(app, event, d->cancelButton)) {
	 d->pressedButton = CANCEL_BUTTON;
	 d->cancelButton.pressed = True;
	 paintButton(app, d->dialogWindow, d->cancelButton);
      } else {
	 d->pressedButton = NO_BUTTON;
      }
   } else if (ButtonRelease == event->type) {
      if (OK_BUTTON == d->pressedButton) {
	 if (eventIsInsideButton(app, event, d->okButton)) {
	    acceptAction(app);
	 } else {
	    if (d->okButton.pressed) {
	       d->okButton.pressed = False;
	       paintButton(app, d->dialogWindow, d->okButton);
	    }
	 }
      } else if (CANCEL_BUTTON == d->pressedButton) {
	 if (eventIsInsideButton(app, event, d->cancelButton)) {
	    cancelAction(app);
	 } else {
	    if (d->cancelButton.pressed) {
	       d->cancelButton.pressed = False;
	       paintButton(app, d->dialogWindow, d->cancelButton);
	    }
	 }
      }
      d->pressedButton = NO_BUTTON;
   }
}

//==============================================================================
void Button::paint (Graphics& g)
{
    if (needsToRelease && isEnabled())
    {
        needsToRelease = false;
        needsRepainting = true;
    }

    paintButton (g, isOver(), isDown());
}

			void ButtonTheme::paint(Graphics &g, const Component *comp) const
			{
				const AbstractButton *button = static_cast<const AbstractButton*>(comp);

				if(button->isContentAreaFilled())
				{
					BasicComponent::paint(g,button);
				}
				util::Dimension componentBoundingBox(button->getBounds().width,button->getBounds().height);
				util::Dimension iconBoundingBox(textUtil.getIconBoundingBox(getActiveIcon(button)));

				StringInfoBuffer stringInfo(textUtil.fitStringInBoundingBox(button->getText(),componentBoundingBox,iconBoundingBox,button->getFont(),button->getInsets(),button->getMargin()));

				util::Dimension stringBoundingBox(textUtil.getStringBoundingBox(stringInfo));

				int verticalIconAlignment = textUtil.getVerticalAlignment(iconBoundingBox,componentBoundingBox,button->getVerticalAlignment(),button->getInsets(),button->getMargin());
				int verticalTextAlignment = textUtil.getVerticalAlignment(stringBoundingBox,componentBoundingBox,button->getVerticalAlignment(),button->getInsets(),button->getMargin());
				int horizontalAlignment = textUtil.getHorizontalAlignment(stringBoundingBox,iconBoundingBox,componentBoundingBox,button->getHorizontalAlignment(),button->getInsets(),button->getMargin());

				if(getActiveIcon(button) != 0)
				{
					getActiveIcon(button)->paint(button,g,horizontalAlignment,verticalIconAlignment);
					horizontalAlignment += getActiveIcon(button)->getIconWidth();
				}

				g.setPaint(button->getForeground());
				g.setFont(button->getFont());

				if(button->hasFocus() && button->isFocusPainted())
				{
					paintFocus(horizontalAlignment,verticalTextAlignment,g,componentBoundingBox,stringBoundingBox,3);
				}

				if(getActiveIcon(button) != 0)
				{
					paintButton(horizontalAlignment,verticalTextAlignment,g,stringInfo,stringBoundingBox,Component::LEFT,getActiveIcon(button));
				}
				else
				{
					paintButton(horizontalAlignment,verticalTextAlignment,g,stringInfo,stringBoundingBox,Component::CENTER,getActiveIcon(button));
				}
			}

bool RenderThemeWinCE::paintMediaFullscreenButton(RenderObject* o, const PaintInfo& paintInfo, const IntRect& r)
{
    bool rc = paintButton(o, paintInfo, r);
    FloatRect imRect = r;
    imRect.inflate(-2);
    paintInfo.context->save();
    paintInfo.context->setStrokeColor(Color::black);
    paintInfo.context->setFillColor(Color::gray);
    paintInfo.context->fillRect(imRect);
    paintInfo.context->restore();
    return rc;
}

void paintDialog(AppInfo *app)
{
   DialogInfo *d = app->dialog;
   Drawable draw = d->dialogWindow;
   int i;
   
   XSetForeground(app->dpy, app->fillGC, d->w3.w.background);
   XFillRectangle(app->dpy, draw, app->fillGC, 0, 0,
		  d->w3.w.width, d->w3.w.height);
   if (d->w3.shadowThickness > 0) {
      draw_shaded_rectangle(app->dpy, draw, 0, 0,
			    d->w3.w.width, d->w3.w.height,
			    d->w3.shadowThickness,
			    d->w3.topShadowColor,
			    d->w3.bottomShadowColor);
   }
   paintLabel(app, draw, d->label);
   for (i = 0; i < d->indicator.count; i++) {
      paintIndicator(app, draw, d->indicators[i]);
   }
   paintButton(app, draw, d->okButton);
   paintButton(app, draw, d->cancelButton);
   XSync(app->dpy, False);
}

void __loadds far mouseEvent(int event, int x, int y) {

#pragma aux mouseEvent parm [EAX] [ECX] [EDX];
	static left_button_hold_down = 0;
	if (event & MOUSE_MOVE) {
		if (left_button_hold_down) {
			recMouseBackground();
			saveMouseBackground(x, y);
		}
		moveMouse(x, y);
	}
	else if (event & MOUSE_RIGHT_UP) {
		//gameState = GAME_QUIT;
	}
	else if (event & MOUSE_LEFT_DOWN) {
		left_button_hold_down = 1;

		/* 以下为鼠标单击按钮事件处理 */
		if (inButton(x, y, &quitButton)) {
			gameState = GAME_QUIT;
		}
		if (inButton(x, y, &playButton)) {
			if (playButton.state == BUTTON_UP) {
				playButton.state = BUTTON_DOWN;
			}
			else {
				playButton.state = BUTTON_UP;
			}
			handlePause();
			paintButton(&playButton);
		}
		if (inButton(x, y, &soundButton)) {
			switchSound();
		}
	}
	else if (event & MOUSE_LEFT_UP) {
		left_button_hold_down = 0;
	}
	else if (event & MOUSE_RIGHT_DOWN) {
	}
}

bool RenderThemeChromiumWin::paintRadio(RenderObject* o, const RenderObject::PaintInfo& i, const IntRect& r)
{
    return paintButton(o, i, r);
}

/*!
  Paints the border and title decoration for the top-level \a widget
  using the \a painter provided and the decoration \a state. The value
  of \a decorationRegion is a combination of the bitmask values of
  enum DecorationRegion.

  Note that Qt for Embedded Linux expects this function to return true if any of
  the widget's decorations are repainted; otherwise it returns false.
 */
bool QDecorationDefault::paint(QPainter *painter,
                               const QWidget *widget,
                               int decorationRegion,
                               DecorationState state)
{
    if (decorationRegion == None)
        return false;

    const QRect titleRect = QDecoration::region(widget, Title).boundingRect();
    const QPalette pal = QApplication::palette();
    int titleHeight = titleRect.height();
    int titleWidth = titleRect.width();
    QRegion oldClipRegion = painter->clipRegion();


    Qt::WindowFlags flags = widget->windowFlags();
    bool hasBorder = !widget->isMaximized();
    bool hasTitle = flags & Qt::WindowTitleHint;
    bool hasSysMenu = flags & Qt::WindowSystemMenuHint;
    bool hasContextHelp = flags & Qt::WindowContextHelpButtonHint;
    bool hasMinimize = flags & Qt::WindowMinimizeButtonHint;
    bool hasMaximize = flags & Qt::WindowMaximizeButtonHint;

    bool paintAll = (decorationRegion == int(All));
    bool handled = false;

    bool porterDuff = painter->paintEngine()->hasFeature(QPaintEngine::PorterDuff);

    if ((paintAll || decorationRegion & Borders) && state == Normal && hasBorder) {
        if (hasTitle) { // reduce flicker
            QRect rect(widget->rect());
            QRect r(rect.left(), rect.top() - titleHeight,
                    rect.width(), titleHeight);
            painter->setClipRegion(oldClipRegion - r);
        }
        QRect br = QDecoration::region(widget).boundingRect();
        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_Source);
        qDrawWinPanel(painter, br.x(), br.y(), br.width(),
                    br.height(), pal, false,
                    &pal.brush(QPalette::Window));
        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_SourceOver);
        handled |= true;
    }

    if ((paintAll || decorationRegion & Title && titleWidth > 0) && state == Normal && hasTitle) {
        painter->setClipRegion(oldClipRegion);
        QBrush titleBrush;
        QPen   titlePen;

        if (widget == qApp->activeWindow()) {
            titleBrush = pal.brush(QPalette::Highlight);
            titlePen   = pal.color(QPalette::HighlightedText);
        } else {
            titleBrush = pal.brush(QPalette::Window);
            titlePen   = pal.color(QPalette::Text);
        }

        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_Source);
        qDrawShadePanel(painter,
                        titleRect.x(), titleRect.y(), titleRect.width(), titleRect.height(),
                        pal, true, 1, &titleBrush);
        if (porterDuff)
            painter->setCompositionMode(QPainter::CompositionMode_SourceOver);

        painter->setPen(titlePen);
        painter->drawText(titleRect.x() + 4, titleRect.y(),
                          titleRect.width() - 8, titleRect.height(),
                          Qt::AlignVCenter, windowTitleFor(widget));
        handled |= true;
    }

    if (state != Hover) {
        painter->setClipRegion(oldClipRegion);
        if ((paintAll || decorationRegion & Menu) && hasSysMenu) {
            paintButton(painter, widget, Menu, state, pal);
            handled |= true;
        }

        if ((paintAll || decorationRegion & Help) && hasContextHelp) {
            paintButton(painter, widget, Help, state, pal);
            handled |= true;
        }

        if ((paintAll || decorationRegion & Minimize) && hasMinimize) {
            paintButton(painter, widget, Minimize, state, pal);
            handled |= true;
        }

//.........这里部分代码省略.........

bool RenderThemeGdk::paintRadio(RenderObject* o, const RenderObject::PaintInfo& i, const IntRect& r)
{ 
    // FIXME: is it the right thing to do?
    return paintButton(o, i, r); 
}

bool RenderThemeQt::paintCheckbox(RenderObject* o, const RenderObject::PaintInfo& i, const IntRect& r)
{
    return paintButton(o, i, r);
}

bool ScrollbarThemeGtk::paint(ScrollbarThemeClient* scrollbar, GraphicsContext* graphicsContext, const IntRect& damageRect)
{
    if (graphicsContext->paintingDisabled())
        return false;

    // Create the ScrollbarControlPartMask based on the damageRect
    ScrollbarControlPartMask scrollMask = NoPart;

    IntRect backButtonStartPaintRect;
    IntRect backButtonEndPaintRect;
    IntRect forwardButtonStartPaintRect;
    IntRect forwardButtonEndPaintRect;
    if (hasButtons(scrollbar)) {
        backButtonStartPaintRect = backButtonRect(scrollbar, BackButtonStartPart, true);
        if (damageRect.intersects(backButtonStartPaintRect))
            scrollMask |= BackButtonStartPart;
        backButtonEndPaintRect = backButtonRect(scrollbar, BackButtonEndPart, true);
        if (damageRect.intersects(backButtonEndPaintRect))
            scrollMask |= BackButtonEndPart;
        forwardButtonStartPaintRect = forwardButtonRect(scrollbar, ForwardButtonStartPart, true);
        if (damageRect.intersects(forwardButtonStartPaintRect))
            scrollMask |= ForwardButtonStartPart;
        forwardButtonEndPaintRect = forwardButtonRect(scrollbar, ForwardButtonEndPart, true);
        if (damageRect.intersects(forwardButtonEndPaintRect))
            scrollMask |= ForwardButtonEndPart;
    }

    IntRect trackPaintRect = trackRect(scrollbar, true);
    if (damageRect.intersects(trackPaintRect))
        scrollMask |= TrackBGPart;

    if (m_troughUnderSteppers && (scrollMask & BackButtonStartPart
            || scrollMask & BackButtonEndPart
            || scrollMask & ForwardButtonStartPart
            || scrollMask & ForwardButtonEndPart))
        scrollMask |= TrackBGPart;

    bool thumbPresent = hasThumb(scrollbar);
    IntRect currentThumbRect;
    if (thumbPresent) {
        IntRect track = trackRect(scrollbar, false);
        currentThumbRect = thumbRect(scrollbar, track);
        if (damageRect.intersects(currentThumbRect))
            scrollMask |= ThumbPart;
    }

    ScrollbarControlPartMask allButtons = BackButtonStartPart | BackButtonEndPart | ForwardButtonStartPart | ForwardButtonEndPart;
    if (scrollMask & TrackBGPart || scrollMask & ThumbPart || scrollMask & allButtons)
        paintScrollbarBackground(graphicsContext, scrollbar);
        paintTrackBackground(graphicsContext, scrollbar, trackPaintRect);

    // Paint the back and forward buttons.
    if (scrollMask & BackButtonStartPart)
        paintButton(graphicsContext, scrollbar, backButtonStartPaintRect, BackButtonStartPart);
    if (scrollMask & BackButtonEndPart)
        paintButton(graphicsContext, scrollbar, backButtonEndPaintRect, BackButtonEndPart);
    if (scrollMask & ForwardButtonStartPart)
        paintButton(graphicsContext, scrollbar, forwardButtonStartPaintRect, ForwardButtonStartPart);
    if (scrollMask & ForwardButtonEndPart)
        paintButton(graphicsContext, scrollbar, forwardButtonEndPaintRect, ForwardButtonEndPart);

    // Paint the thumb.
    if (scrollMask & ThumbPart)
        paintThumb(graphicsContext, scrollbar, currentThumbRect);

    return true;
}

bool RenderTheme::paint(const RenderBox& box, ControlStates& controlStates, const PaintInfo& paintInfo, const LayoutRect& rect)
{
    // If painting is disabled, but we aren't updating control tints, then just bail.
    // If we are updating control tints, just schedule a repaint if the theme supports tinting
    // for that control.
    if (paintInfo.context().updatingControlTints()) {
        if (controlSupportsTints(box))
            box.repaint();
        return false;
    }
    if (paintInfo.context().paintingDisabled())
        return false;

    ControlPart part = box.style().appearance();
    IntRect integralSnappedRect = snappedIntRect(rect);
    float deviceScaleFactor = box.document().deviceScaleFactor();
    FloatRect devicePixelSnappedRect = snapRectToDevicePixels(rect, deviceScaleFactor);

#if USE(NEW_THEME)
    float pageScaleFactor = box.document().page() ? box.document().page()->pageScaleFactor() : 1.0f;
    
    switch (part) {
    case CheckboxPart:
    case RadioPart:
    case PushButtonPart:
    case SquareButtonPart:
    case DefaultButtonPart:
    case ButtonPart:
    case InnerSpinButtonPart:
        updateControlStatesForRenderer(box, controlStates);
        m_theme->paint(part, controlStates, paintInfo.context(), devicePixelSnappedRect, box.style().effectiveZoom(), &box.view().frameView(), deviceScaleFactor, pageScaleFactor);
        return false;
    default:
        break;
    }
#else
    UNUSED_PARAM(controlStates);
#endif

    // Call the appropriate paint method based off the appearance value.
    switch (part) {
#if !USE(NEW_THEME)
    case CheckboxPart:
        return paintCheckbox(box, paintInfo, integralSnappedRect);
    case RadioPart:
        return paintRadio(box, paintInfo, integralSnappedRect);
    case PushButtonPart:
    case SquareButtonPart:
    case DefaultButtonPart:
    case ButtonPart:
        return paintButton(box, paintInfo, integralSnappedRect);
    case InnerSpinButtonPart:
        return paintInnerSpinButton(box, paintInfo, integralSnappedRect);
#endif
    case MenulistPart:
        return paintMenuList(box, paintInfo, devicePixelSnappedRect);
#if ENABLE(METER_ELEMENT)
    case MeterPart:
    case RelevancyLevelIndicatorPart:
    case ContinuousCapacityLevelIndicatorPart:
    case DiscreteCapacityLevelIndicatorPart:
    case RatingLevelIndicatorPart:
        return paintMeter(box, paintInfo, integralSnappedRect);
#endif
    case ProgressBarPart:
        return paintProgressBar(box, paintInfo, integralSnappedRect);
    case SliderHorizontalPart:
    case SliderVerticalPart:
        return paintSliderTrack(box, paintInfo, integralSnappedRect);
    case SliderThumbHorizontalPart:
    case SliderThumbVerticalPart:
        return paintSliderThumb(box, paintInfo, integralSnappedRect);
    case MediaEnterFullscreenButtonPart:
    case MediaExitFullscreenButtonPart:
        return paintMediaFullscreenButton(box, paintInfo, integralSnappedRect);
    case MediaPlayButtonPart:
        return paintMediaPlayButton(box, paintInfo, integralSnappedRect);
    case MediaOverlayPlayButtonPart:
        return paintMediaOverlayPlayButton(box, paintInfo, integralSnappedRect);
    case MediaMuteButtonPart:
        return paintMediaMuteButton(box, paintInfo, integralSnappedRect);
    case MediaSeekBackButtonPart:
        return paintMediaSeekBackButton(box, paintInfo, integralSnappedRect);
    case MediaSeekForwardButtonPart:
        return paintMediaSeekForwardButton(box, paintInfo, integralSnappedRect);
    case MediaRewindButtonPart:
        return paintMediaRewindButton(box, paintInfo, integralSnappedRect);
    case MediaReturnToRealtimeButtonPart:
        return paintMediaReturnToRealtimeButton(box, paintInfo, integralSnappedRect);
    case MediaToggleClosedCaptionsButtonPart:
        return paintMediaToggleClosedCaptionsButton(box, paintInfo, integralSnappedRect);
    case MediaSliderPart:
        return paintMediaSliderTrack(box, paintInfo, integralSnappedRect);
    case MediaSliderThumbPart:
        return paintMediaSliderThumb(box, paintInfo, integralSnappedRect);
    case MediaVolumeSliderMuteButtonPart:
        return paintMediaMuteButton(box, paintInfo, integralSnappedRect);
    case MediaVolumeSliderContainerPart:
        return paintMediaVolumeSliderContainer(box, paintInfo, integralSnappedRect);
    case MediaVolumeSliderPart:
//.........这里部分代码省略.........

 virtual bool paintRadio(RenderObject* o, const RenderObject::PaintInfo& i, const IntRect& r)
 {
     return paintButton(o, i, r);
 }