*
* ***** END LICENSE BLOCK ***** */
-// Guacamole namespace
+/**
+ * Namespace for all Guacamole JavaScript objects.
+ * @namespace
+ */
var Guacamole = Guacamole || {};
/**
* @private
*/
var displayContext = display.getContext("2d");
+ displayContext.save();
/**
* The queue of all pending Tasks. Tasks will be run in order, with new
/**
* Whether a new path should be started with the next path drawing
* operations.
+ * @private
*/
var pathClosed = true;
/**
* The number of states on the state stack.
+ *
+ * Note that there will ALWAYS be one element on the stack, but that
+ * element is not exposed. It is only used to reset the layer to its
+ * initial state.
+ *
+ * @private
*/
var stackSize = 0;
width = newWidth;
height = newHeight;
+ // Acknowledge reset of stack (happens on resize of canvas)
+ stackSize = 0;
+ displayContext.save();
+
}
/**
* as whether the task is blocked depends completely on whether the
* other layer is currently ready.
*
+ * @private
* @param {Guacamole.Layer} otherLayer The other layer which must be blocked
* until this task completes.
* @param {function} handler The function to call when possible.
};
/**
- * Add the specified cubic bezier point to the current path.
+ * Starts a new path at the specified point.
*
* @param {Number} x The X coordinate of the point to draw.
* @param {Number} y The Y coordinate of the point to draw.
+ */
+ this.moveTo = function(x, y) {
+ scheduleTask(function() {
+
+ // Start a new path if current path is closed
+ if (pathClosed) {
+ displayContext.beginPath();
+ pathClosed = false;
+ }
+
+ if (layer.autosize != 0) fitRect(x, y, 0, 0);
+ displayContext.moveTo(x, y);
+
+ });
+ };
+
+ /**
+ * Add the specified line to the current path.
+ *
+ * @param {Number} x The X coordinate of the endpoint of the line to draw.
+ * @param {Number} y The Y coordinate of the endpoint of the line to draw.
+ */
+ this.lineTo = function(x, y) {
+ scheduleTask(function() {
+
+ // Start a new path if current path is closed
+ if (pathClosed) {
+ displayContext.beginPath();
+ pathClosed = false;
+ }
+
+ if (layer.autosize != 0) fitRect(x, y, 0, 0);
+ displayContext.lineTo(x, y);
+
+ });
+ };
+
+ /**
+ * Add the specified arc to the current path.
+ *
+ * @param {Number} x The X coordinate of the center of the circle which
+ * will contain the arc.
+ * @param {Number} y The Y coordinate of the center of the circle which
+ * will contain the arc.
+ * @param {Number} radius The radius of the circle.
+ * @param {Number} startAngle The starting angle of the arc, in radians.
+ * @param {Number} endAngle The ending angle of the arc, in radians.
+ * @param {Boolean} negative Whether the arc should be drawn in order of
+ * decreasing angle.
+ */
+ this.arc = function(x, y, radius, startAngle, endAngle, negative) {
+ scheduleTask(function() {
+
+ // Start a new path if current path is closed
+ if (pathClosed) {
+ displayContext.beginPath();
+ pathClosed = false;
+ }
+
+ if (layer.autosize != 0) fitRect(x, y, 0, 0);
+ displayContext.arc(x, y, radius, startAngle, endAngle, negative);
+
+ });
+ };
+
+ /**
+ * Starts a new path at the specified point.
+ *
* @param {Number} cp1x The X coordinate of the first control point.
* @param {Number} cp1y The Y coordinate of the first control point.
* @param {Number} cp2x The X coordinate of the second control point.
* @param {Number} cp2y The Y coordinate of the second control point.
+ * @param {Number} x The X coordinate of the endpoint of the curve.
+ * @param {Number} y The Y coordinate of the endpoint of the curve.
*/
- this.path = function(x, y, cp1x, cp1y, cp2x, cp2y) {
+ this.curveTo = function(cp1x, cp1y, cp2x, cp2y, x, y) {
scheduleTask(function() {
// Start a new path if current path is closed
}
if (layer.autosize != 0) fitRect(x, y, 0, 0);
- displayContext.bezierCurveTo(cp1x, cp1y, cp2x, cp2y, y);
+ displayContext.bezierCurveTo(cp1x, cp1y, cp2x, cp2y, x, y);
+
+ });
+ };
+
+ /**
+ * Closes the current path by connecting the end point with the start
+ * point (if any) with a straight line.
+ */
+ this.close = function() {
+ scheduleTask(function() {
+
+ // Close path
+ displayContext.closePath();
+ pathClosed = true;
});
};
// Clear stack
while (stackSize > 0) {
- displaycontext.restore();
+ displayContext.restore();
stackSize--;
}
- // Clear transform
- displayContext.setTransform(
- 1, 0, 0,
- 0, 1, 0
- /*0, 0, 1*/
- );
+ // Restore to initial state
+ displayContext.restore();
+ displayContext.save();
// Clear path
displayContext.beginPath();
};
/**
- * Applies the given affine transform (defined with three values from the
+ * Sets the given affine transform (defined with six values from the
+ * transform's matrix).
+ *
+ * @param {Number} a The first value in the affine transform's matrix.
+ * @param {Number} b The second value in the affine transform's matrix.
+ * @param {Number} c The third value in the affine transform's matrix.
+ * @param {Number} d The fourth value in the affine transform's matrix.
+ * @param {Number} e The fifth value in the affine transform's matrix.
+ * @param {Number} f The sixth value in the affine transform's matrix.
+ */
+ this.setTransform = function(a, b, c, d, e, f) {
+ scheduleTask(function() {
+
+ // Set transform
+ displayContext.setTransform(
+ a, b, c,
+ d, e, f
+ /*0, 0, 1*/
+ );
+
+ });
+ };
+
+
+ /**
+ * Applies the given affine transform (defined with six values from the
* transform's matrix).
*
* @param {Number} a The first value in the affine transform's matrix.
this.transform = function(a, b, c, d, e, f) {
scheduleTask(function() {
- // Clear transform
+ // Apply transform
displayContext.transform(
a, b, c,
d, e, f
projects / guacamole-common-js.git / blobdiff