Examples with Context2D com.ait.lienzo.client.core.Context2D used on opensource projects

Example 1 with Context2D

use of com.ait.lienzo.client.core.Context2D in project lienzo-core by ahome-it.

the class ColorExtractor method extract.

public static final Color extract(final String color) {
    SCRATCH.clear();
    final Context2D context = SCRATCH.getContext();
    context.setFillColor(color);
    context.fillRect(0, 0, 2, 2);
    final ImageData data = context.getImageData(0, 0, 2, 2);
    return new Color(data.getRedAt(1, 1), data.getGreenAt(1, 1), data.getBlueAt(1, 1), ((data.getAlphaAt(1, 1)) / 255.0));
}

Example 2 with Context2D

use of com.ait.lienzo.client.core.Context2D in project lienzo-core by ahome-it.

the class WiresConnectorControlImpl method getIndexForSelectedSegment.

public static int getIndexForSelectedSegment(final WiresConnector connector, final int mouseX, final int mouseY, final Point2DArray oldPoints) {
    final NFastStringMap<Integer> colorMap = new NFastStringMap<>();
    final AbstractDirectionalMultiPointShape<?> line = connector.getLine();
    final ScratchPad scratch = line.getScratchPad();
    scratch.clear();
    final PathPartList path = line.getPathPartList();
    int pointsIndex = 1;
    String color = MagnetManager.m_c_rotor.next();
    colorMap.put(color, pointsIndex);
    final Context2D ctx = scratch.getContext();
    final double strokeWidth = line.getStrokeWidth();
    ctx.setStrokeWidth(strokeWidth);
    final Point2D absolutePos = connector.getLine().getComputedLocation();
    final double offsetX = absolutePos.getX();
    final double offsetY = absolutePos.getY();
    Point2D pathStart = new Point2D(offsetX, offsetY);
    Point2D segmentStart = pathStart;
    for (int i = 0; i < path.size(); i++) {
        final PathPartEntryJSO entry = path.get(i);
        NFastDoubleArrayJSO points = entry.getPoints();
        switch(entry.getCommand()) {
            case PathPartEntryJSO.MOVETO_ABSOLUTE:
                {
                    final double x0 = points.get(0) + offsetX;
                    final double y0 = points.get(1) + offsetY;
                    final Point2D m = new Point2D(x0, y0);
                    if (i == 0) {
                        // this is position is needed, if we close the path.
                        pathStart = m;
                    }
                    segmentStart = m;
                    break;
                }
            case PathPartEntryJSO.LINETO_ABSOLUTE:
                {
                    points = entry.getPoints();
                    final double x0 = points.get(0) + offsetX;
                    final double y0 = points.get(1) + offsetY;
                    final Point2D end = new Point2D(x0, y0);
                    if (oldPoints.get(pointsIndex).equals(segmentStart)) {
                        pointsIndex++;
                        color = MagnetManager.m_c_rotor.next();
                        colorMap.put(color, pointsIndex);
                    }
                    ctx.setStrokeColor(color);
                    ctx.beginPath();
                    ctx.moveTo(segmentStart.getX(), segmentStart.getY());
                    ctx.lineTo(x0, y0);
                    ctx.stroke();
                    segmentStart = end;
                    break;
                }
            case PathPartEntryJSO.CLOSE_PATH_PART:
                {
                    final double x0 = pathStart.getX() + offsetX;
                    final double y0 = pathStart.getY() + offsetY;
                    final Point2D end = new Point2D(x0, y0);
                    if (oldPoints.get(pointsIndex).equals(segmentStart)) {
                        pointsIndex++;
                        color = MagnetManager.m_c_rotor.next();
                        colorMap.put(color, pointsIndex);
                    }
                    ctx.setStrokeColor(color);
                    ctx.beginPath();
                    ctx.moveTo(segmentStart.getX(), segmentStart.getY());
                    ctx.lineTo(x0, y0);
                    ctx.stroke();
                    segmentStart = end;
                    break;
                }
            case PathPartEntryJSO.CANVAS_ARCTO_ABSOLUTE:
                {
                    points = entry.getPoints();
                    final double x0 = points.get(0) + offsetX;
                    final double y0 = points.get(1) + offsetY;
                    final Point2D p0 = new Point2D(x0, y0);
                    final double x1 = points.get(2) + offsetX;
                    final double y1 = points.get(3) + offsetY;
                    final double r = points.get(4);
                    final Point2D p1 = new Point2D(x1, y1);
                    final Point2D end = p1;
                    if (p0.equals(oldPoints.get(pointsIndex))) {
                        pointsIndex++;
                        color = MagnetManager.m_c_rotor.next();
                        colorMap.put(color, pointsIndex);
                    }
                    ctx.setStrokeColor(color);
                    ctx.beginPath();
                    ctx.moveTo(segmentStart.getX(), segmentStart.getY());
                    ctx.arcTo(x0, y0, x1, y1, r);
                    ctx.stroke();
                    segmentStart = end;
                    break;
                }
        }
    }
    final BoundingBox box = connector.getLine().getBoundingBox();
    // Keep the ImageData small by clipping just the visible line area
    // But remember the mouse must be offset for this clipped area.
    final int sx = (int) (box.getX() - strokeWidth - offsetX);
    final int sy = (int) (box.getY() - strokeWidth - offsetY);
    final ImageData backing = ctx.getImageData(sx, sy, (int) (box.getWidth() + strokeWidth + strokeWidth), (int) (box.getHeight() + strokeWidth + strokeWidth));
    color = BackingColorMapUtils.findColorAtPoint(backing, mouseX - sx, mouseY - sy);
    return null != color ? colorMap.get(color) : -1;
}

Example 3 with Context2D

use of com.ait.lienzo.client.core.Context2D in project lienzo-core by ahome-it.

the class Layer method getCanvasElement.

/**
 * Return the {@link CanvasElement}.
 *
 * @return CanvasElement
 */
public CanvasElement getCanvasElement() {
    if (LienzoCore.IS_CANVAS_SUPPORTED) {
        if (null == m_element) {
            m_element = Document.get().createCanvasElement();
            m_element.getStyle().setPosition(Position.ABSOLUTE);
            m_element.getStyle().setDisplay(Display.INLINE_BLOCK);
        }
        if (null == m_context) {
            m_context = new Context2D(m_element);
        }
    }
    return m_element;
}

Example 4 with Context2D

use of com.ait.lienzo.client.core.Context2D in project lienzo-core by ahome-it.

the class Scene method toDataURL.

public final String toDataURL(final DataURLType mimetype) {
    if (LienzoCore.IS_CANVAS_SUPPORTED) {
        final ScratchPad scratch = new ScratchPad(getWidth(), getHeight());
        final Context2D context = scratch.getContext();
        final NFastArrayList<Layer> layers = getChildNodes();
        BoundingBox bbox = getStorageBounds();
        if (null == bbox) {
            final Viewport viewport = getViewport();
            if (null != viewport) {
                bbox = viewport.getStorageBounds();
            }
        }
        if (null != layers) {
            final int size = layers.size();
            final IPathClipper clip = getPathClipper();
            if ((null != clip) && (clip.isActive())) {
                context.save();
                clip.clip(context);
            }
            for (int i = size - 1; i >= 0; i--) {
                final Layer layer = layers.get(i);
                if ((null != layer) && (layer.isVisible())) {
                    layer.drawWithTransforms(context, 1, bbox);
                }
            }
            if ((null != clip) && (clip.isActive())) {
                context.restore();
            }
        }
        return scratch.toDataURL(mimetype, 1.0);
    } else {
        return "data:,";
    }
}

Example 5 with Context2D

use of com.ait.lienzo.client.core.Context2D in project lienzo-core by ahome-it.

the class Scene method toDataURL.

// package protected
final String toDataURL(final DataURLType mimetype, final Layer background) {
    if (LienzoCore.IS_CANVAS_SUPPORTED) {
        final ScratchPad scratch = new ScratchPad(getWidth(), getHeight());
        final Context2D context = scratch.getContext();
        final NFastArrayList<Layer> layers = getChildNodes();
        BoundingBox bbox = getStorageBounds();
        if (null == bbox) {
            final Viewport viewport = getViewport();
            if (null != viewport) {
                bbox = viewport.getStorageBounds();
            }
        }
        if (null != layers) {
            final int size = layers.size();
            if (null != background) {
                background.drawWithTransforms(context, 1, bbox);
            }
            final IPathClipper clip = getPathClipper();
            if ((null != clip) && (clip.isActive())) {
                context.save();
                clip.clip(context);
            }
            for (int i = size - 1; i >= 0; i--) {
                final Layer layer = layers.get(i);
                if ((null != layer) && (layer.isVisible())) {
                    layer.drawWithTransforms(context, 1, bbox);
                }
            }
            if ((null != clip) && (clip.isActive())) {
                context.restore();
            }
        }
        return scratch.toDataURL(mimetype, 1.0);
    } else {
        return "data:,";
    }
}