C++ RectanglePlacement类代码示例

void Graphics::drawImageWithin (const Image& imageToDraw,
                                const int destX, const int destY,
                                const int destW, const int destH,
                                const RectanglePlacement& placementWithinTarget,
                                const bool fillAlphaChannelWithCurrentBrush) const
{
    // passing in a silly number can cause maths problems in rendering!
    jassert (areCoordsSensibleNumbers (destX, destY, destW, destH));

    if (imageToDraw.isValid())
    {
        const int imageW = imageToDraw.getWidth();
        const int imageH = imageToDraw.getHeight();

        if (imageW > 0 && imageH > 0)
        {
            double newX = 0.0, newY = 0.0;
            double newW = imageW;
            double newH = imageH;

            placementWithinTarget.applyTo (newX, newY, newW, newH,
                                           destX, destY, destW, destH);

            if (newW > 0 && newH > 0)
            {
                drawImage (imageToDraw,
                           roundToInt (newX), roundToInt (newY),
                           roundToInt (newW), roundToInt (newH),
                           0, 0, imageW, imageH,
                           fillAlphaChannelWithCurrentBrush);
            }
        }
    }
}

void QuickTimeMovieComponent::setBoundsWithCorrectAspectRatio (const Rectangle& spaceToFitWithin,
        const RectanglePlacement& placement)
{
    int normalWidth, normalHeight;
    getMovieNormalSize (normalWidth, normalHeight);

    if (normalWidth > 0 && normalHeight > 0 && ! spaceToFitWithin.isEmpty())
    {
        double x = 0.0, y = 0.0, w = normalWidth, h = normalHeight;

        placement.applyTo (x, y, w, h,
                           spaceToFitWithin.getX(), spaceToFitWithin.getY(),
                           spaceToFitWithin.getWidth(), spaceToFitWithin.getHeight());

        if (w > 0 && h > 0)
        {
            setBounds (roundToInt (x), roundToInt (y),
                       roundToInt (w), roundToInt (h));
        }
    }
    else
    {
        setBounds (spaceToFitWithin);
    }
}

void Graphics::drawImage (const Image& imageToDraw, Rectangle<float> targetArea,
                          RectanglePlacement placementWithinTarget, bool fillAlphaChannelWithCurrentBrush) const
{
    if (imageToDraw.isValid())
        drawImageTransformed (imageToDraw,
                              placementWithinTarget.getTransformToFit (imageToDraw.getBounds().toFloat(), targetArea),
                              fillAlphaChannelWithCurrentBrush);
}

void Graphics::drawImageWithin (const Image& imageToDraw,
                                int dx, int dy, int dw, int dh,
                                RectanglePlacement placementWithinTarget,
                                const bool fillAlphaChannelWithCurrentBrush) const
{
    if (imageToDraw.isValid())
        drawImageTransformed (imageToDraw,
                              placementWithinTarget.getTransformToFit (imageToDraw.getBounds().toFloat(),
                                                                       coordsToRectangle (dx, dy, dw, dh).toFloat()),
                              fillAlphaChannelWithCurrentBrush);
}

void QuickTimeMovieComponent::setBoundsWithCorrectAspectRatio (const Rectangle<int>& spaceToFitWithin,
                                                               RectanglePlacement placement)
{
    int normalWidth, normalHeight;
    getMovieNormalSize (normalWidth, normalHeight);

    const Rectangle<int> normalSize (0, 0, normalWidth, normalHeight);

    if (! (spaceToFitWithin.isEmpty() || normalSize.isEmpty()))
        setBounds (placement.appliedTo (normalSize, spaceToFitWithin));
    else
        setBounds (spaceToFitWithin);
}

    void drawCurrentImage (Graphics& g, int x, int y, int w, int h)
    {
        if (imageNeedsFlipping)
        {
            const ScopedLock sl (imageSwapLock);
            std::swap (loadingImage, activeImage);
            imageNeedsFlipping = false;
        }

        RectanglePlacement rp (RectanglePlacement::centred);
        double dx = 0, dy = 0, dw = width, dh = height;
        rp.applyTo (dx, dy, dw, dh, x, y, w, h);
        const int rx = roundToInt (dx), ry = roundToInt (dy);
        const int rw = roundToInt (dw), rh = roundToInt (dh);

        {
            Graphics::ScopedSaveState ss (g);

            g.excludeClipRegion (Rectangle<int> (rx, ry, rw, rh));
            g.fillAll (Colours::black);
        }

        g.drawImage (activeImage, rx, ry, rw, rh, 0, 0, width, height);
    }

void Drawable::drawWithin (Graphics& g, const Rectangle<float>& destArea, const RectanglePlacement& placement, float opacity) const
{
    draw (g, opacity, placement.getTransformToFit (getDrawableBounds(), destArea));
}

void Drawable::setTransformToFit (const Rectangle<float>& area, const RectanglePlacement& placement)
{
    if (! area.isEmpty())
        setTransform (placement.getTransformToFit (getDrawableBounds(), area));
}