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/**
* @license
* Visual Blocks Editor
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Class for a button in the flyout.
* @author fenichel@google.com (Rachel Fenichel)
*/
'use strict';
goog.provide('Blockly.FlyoutButton');
goog.require('goog.dom');
goog.require('goog.math.Coordinate');
/**
* Class for a button in the flyout.
* @param {!Blockly.Workspace} workspace The workspace in which to place this
* button.
* @param {!Blockly.Workspace} targetWorkspace The flyout's target workspace.
* @param {string} text The text to display on the button.
* @constructor
*/
Blockly.FlyoutButton = function(workspace, targetWorkspace, text) {
/**
* @type {!Blockly.Workspace}
* @private
*/
this.workspace_ = workspace;
/**
* @type {!Blockly.Workspace}
* @private
*/
this.targetWorkspace_ = targetWorkspace;
/**
* @type {string}
* @private
*/
this.text_ = text;
/**
* @type {goog.math.Coordinate}
* @private
*/
this.position_ = new goog.math.Coordinate(0, 0);
};
/**
* The margin around the text in the button.
*/
Blockly.FlyoutButton.MARGIN = 5;
/**
* The width of the button's rect.
* @type {number}
*/
Blockly.FlyoutButton.prototype.width = 0;
/**
* The height of the button's rect.
* @type {number}
*/
Blockly.FlyoutButton.prototype.height = 0;
/**
* Create the button elements.
* @return {!Element} The button's SVG group.
*/
Blockly.FlyoutButton.prototype.createDom = function() {
this.svgGroup_ = Blockly.createSvgElement('g',
{'class': 'blocklyFlyoutButton'}, this.workspace_.getCanvas());
// Rect with rounded corners.
var rect = Blockly.createSvgElement('rect',
{'rx': 4, 'ry': 4,
'height': 0, 'width': 0},
this.svgGroup_);
var svgText = Blockly.createSvgElement('text',
{'class': 'blocklyText', 'x': 0, 'y': 0,
'text-anchor': 'middle'}, this.svgGroup_);
svgText.textContent = this.text_;
this.width = svgText.getComputedTextLength() +
2 * Blockly.FlyoutButton.MARGIN;
this.height = 20; // Can't compute it :(
rect.setAttribute('width', this.width);
rect.setAttribute('height', this.height);
svgText.setAttribute('x', this.width / 2);
svgText.setAttribute('y', this.height - Blockly.FlyoutButton.MARGIN);
this.updateTransform_();
return this.svgGroup_;
};
/**
* Correctly position the flyout button and make it visible.
*/
Blockly.FlyoutButton.prototype.show = function() {
this.updateTransform_();
this.svgGroup_.setAttribute('display', 'block');
};
/**
* Update svg attributes to match internal state.
*/
Blockly.FlyoutButton.prototype.updateTransform_ = function() {
this.svgGroup_.setAttribute('transform', 'translate(' + this.position_.x +
',' + this.position_.y + ')');
};
/**
* Move the button to the given x, y coordinates.
* @param {number} x The new x coordinate.
* @param {number} y The new y coordinate.
*/
Blockly.FlyoutButton.prototype.moveTo = function(x, y) {
this.position_.x = x;
this.position_.y = y;
this.updateTransform_();
};
/**
* Dispose of this button.
*/
Blockly.FlyoutButton.prototype.dispose = function() {
if (this.svgGroup_) {
goog.dom.removeNode(this.svgGroup_);
this.svgGroup_ = null;
}
this.workspace_ = null;
this.targetWorkspace_ = null;
};
/**
* Do something when the button is clicked.
* @param {!Event} e Mouse up event.
*/
Blockly.FlyoutButton.prototype.onMouseUp = function(e) {
// Don't scroll the page.
e.preventDefault();
// Don't propagate mousewheel event (zooming).
e.stopPropagation();
// Stop binding to mouseup and mousemove events--flyout mouseup would normally
// do this, but we're skipping that.
Blockly.Flyout.terminateDrag_();
Blockly.Variables.createVariable(this.targetWorkspace_);
};
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