Package org.eclipse.swt.graphics

Examples of org.eclipse.swt.graphics.Transform

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     * Applies a rotation transform.
     *
     * @param theta  the angle of rotation.
     */
    public void rotate(double theta) {
        Transform swtTransform = new Transform(this.gc.getDevice());
        this.gc.getTransform(swtTransform);
        swtTransform.rotate((float) (theta * 180 / Math.PI));
        this.gc.setTransform(swtTransform);
        swtTransform.dispose();
    }
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     *
     * @param scaleX  the scale factor along the x-axis.
     * @param scaleY  the scale factor along the y-axis.
     */
    public void scale(double scaleX, double scaleY) {
        Transform swtTransform = new Transform(this.gc.getDevice());
        this.gc.getTransform(swtTransform);
        swtTransform.scale((float) scaleX, (float) scaleY);
        this.gc.setTransform(swtTransform);
        swtTransform.dispose();
    }
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     *
     * @param shearX  the x-factor.
     * @param shearY  the y-factor.
     */
    public void shear(double shearX, double shearY) {
        Transform swtTransform = new Transform(this.gc.getDevice());
        this.gc.getTransform(swtTransform);
        Transform shear = new Transform(this.gc.getDevice(), 1f, (float) shearX,
                (float) shearY, 1f, 0, 0);
        swtTransform.multiply(shear);
        this.gc.setTransform(swtTransform);
        swtTransform.dispose();
    }
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     *
     * @param awtTransform The AWT transform to convert.
     * @return A SWT transform instance.
     */
    private Transform getSwtTransformFromPool(AffineTransform awtTransform) {
        Transform t = (Transform) this.transformsPool.get(awtTransform);
        if (t == null) {
            t = new Transform(this.gc.getDevice());
            double[] matrix = new double[6];
            awtTransform.getMatrix(matrix);
            t.setElements((float) matrix[0], (float) matrix[1],
                    (float) matrix[2], (float) matrix[3],
                    (float) matrix[4], (float) matrix[5]);
            addToResourcePool(t);
            this.transformsPool.put(awtTransform, t);
        }
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     * Returns the current transform.
     *
     * @return The current transform.
     */
    public AffineTransform getTransform() {
        Transform swtTransform = new Transform(this.gc.getDevice());
        this.gc.getTransform(swtTransform);
        AffineTransform awtTransform = toAwtTransform(swtTransform);
        swtTransform.dispose();
        return awtTransform;
    }
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     * Sets the current transform.
     *
     * @param t  the transform.
     */
    public void setTransform(AffineTransform t) {
        Transform transform = getSwtTransformFromPool(t);
        this.gc.setTransform(transform);
    }
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     * Concatenates the specified transform to the existing transform.
     *
     * @param t  the transform.
     */
    public void transform(AffineTransform t) {
        Transform swtTransform = new Transform(this.gc.getDevice());
        this.gc.getTransform(swtTransform);
        swtTransform.multiply(getSwtTransformFromPool(t));
        this.gc.setTransform(swtTransform);
        swtTransform.dispose();
    }
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     *
     * @param x  the translation along the x-axis.
     * @param y  the translation along the y-axis.
     */
    public void translate(int x, int y) {
        Transform swtTransform = new Transform(this.gc.getDevice());
        this.gc.getTransform(swtTransform);
        swtTransform.translate(x, y);
        this.gc.setTransform(swtTransform);
        swtTransform.dispose();
    }
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     * Applies a rotation transform.
     *
     * @param theta  the angle of rotation.
     */
    public void rotate(double theta) {
        Transform swtTransform = new Transform(this.gc.getDevice());
        this.gc.getTransform(swtTransform);
        swtTransform.rotate((float) (theta * 180 / Math.PI));
        this.gc.setTransform(swtTransform);
        swtTransform.dispose();
    }
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     *
     * @param scaleX  the scale factor along the x-axis.
     * @param scaleY  the scale factor along the y-axis.
     */
    public void scale(double scaleX, double scaleY) {
        Transform swtTransform = new Transform(this.gc.getDevice());
        this.gc.getTransform(swtTransform);
        swtTransform.scale((float) scaleX, (float) scaleY);
        this.gc.setTransform(swtTransform);
        swtTransform.dispose();
    }
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