251 lines
8.4 KiB
JavaScript
251 lines
8.4 KiB
JavaScript
import { Factory } from "../Factory.js";
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import { Util } from "../Util.js";
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import { Shape } from "../Shape.js";
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import { Group } from "../Group.js";
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import { getNumberOrArrayOfNumbersValidator, getNumberValidator, } from "../Validators.js";
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import { _registerNode } from "../Global.js";
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import { Text } from "./Text.js";
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// constants
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const ATTR_CHANGE_LIST = [
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...Text.prototype._attrsAffectingSize,
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'width',
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'height',
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'pointerDirection',
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'pointerWidth',
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'pointerHeight',
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], CHANGE_EVENTS = ATTR_CHANGE_LIST.map((attr) => attr + 'Change.konva').join(' '), NONE = 'none', UP = 'up', RIGHT = 'right', DOWN = 'down', LEFT = 'left';
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/**
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* Label constructor. Labels are groups that contain a Text and Tag shape
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* @constructor
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* @memberof Konva
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* @param {Object} config
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* @@nodeParams
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* @example
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* // create label
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* var label = new Konva.Label({
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* x: 100,
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* y: 100,
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* draggable: true
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* });
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*
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* // add a tag to the label
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* label.add(new Konva.Tag({
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* fill: '#bbb',
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* stroke: '#333',
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* shadowColor: 'black',
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* shadowBlur: 10,
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* shadowOffset: { x: 10, y: 10 },
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* shadowOpacity: 0.2,
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* lineJoin: 'round',
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* pointerDirection: 'up',
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* pointerWidth: 20,
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* pointerHeight: 20,
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* cornerRadius: 5
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* }));
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*
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* // add text to the label
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* label.add(new Konva.Text({
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* text: 'Hello World!',
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* fontSize: 50,
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* lineHeight: 1.2,
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* padding: 10,
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* fill: 'green'
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* }));
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*/
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export class Label extends Group {
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constructor(config) {
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super(config);
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this._sync = this._sync.bind(this);
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this.on('add.konva', function (evt) {
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// re-adding the same child must not stack another listener
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evt.child.off(CHANGE_EVENTS, this._sync).on(CHANGE_EVENTS, this._sync);
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this._sync();
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});
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}
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/**
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* get Text shape for the label. You need to access the Text shape in order to update
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* the text properties
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* @name Konva.Label#getText
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* @method
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* @example
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* label.getText().fill('red')
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*/
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getText() {
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return this.find('Text')[0];
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}
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/**
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* get Tag shape for the label. You need to access the Tag shape in order to update
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* the pointer properties and the corner radius
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* @name Konva.Label#getTag
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* @method
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*/
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getTag() {
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return this.find('Tag')[0];
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}
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getWidth() {
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return this.getText().width();
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}
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getHeight() {
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return this.getText().height();
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}
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_sync() {
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let text = this.getText(), tag = this.getTag(), width, height, pointerDirection, pointerWidth, x, y, pointerHeight;
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if (text && tag) {
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width = text.width();
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height = text.height();
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pointerDirection = tag.pointerDirection();
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pointerWidth = tag.pointerWidth();
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pointerHeight = tag.pointerHeight();
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x = 0;
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y = 0;
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switch (pointerDirection) {
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case UP:
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x = width / 2;
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y = -1 * pointerHeight;
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break;
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case RIGHT:
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x = width + pointerWidth;
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y = height / 2;
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break;
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case DOWN:
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x = width / 2;
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y = height + pointerHeight;
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break;
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case LEFT:
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x = -1 * pointerWidth;
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y = height / 2;
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break;
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}
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tag.setAttrs({
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x: -1 * x,
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y: -1 * y,
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width: width,
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height: height,
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});
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text.setAttrs({
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x: -1 * x,
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y: -1 * y,
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});
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}
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}
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}
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Label.prototype.className = 'Label';
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_registerNode(Label);
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/**
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* Tag constructor. A Tag can be configured
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* to have a pointer element that points up, right, down, or left
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* @constructor
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* @memberof Konva
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* @param {Object} config
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* @param {String} [config.pointerDirection] can be up, right, down, left, or none; the default
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* is none. When a pointer is present, the positioning of the label is relative to the tip of the pointer.
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* @param {Number} [config.pointerWidth]
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* @param {Number} [config.pointerHeight]
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* @param {Number} [config.cornerRadius]
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*/
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export class Tag extends Shape {
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_sceneFunc(context) {
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const width = this.width(), height = this.height(), pointerDirection = this.pointerDirection(), pointerWidth = this.pointerWidth(), pointerHeight = this.pointerHeight(), cornerRadius = this.cornerRadius();
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const [topLeft, topRight, bottomRight, bottomLeft] = Util._cornerRadii(cornerRadius, width, height);
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context.beginPath();
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context.moveTo(topLeft, 0);
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if (pointerDirection === UP) {
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context.lineTo((width - pointerWidth) / 2, 0);
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context.lineTo(width / 2, -1 * pointerHeight);
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context.lineTo((width + pointerWidth) / 2, 0);
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}
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context.lineTo(width - topRight, 0);
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context.arc(width - topRight, topRight, topRight, (Math.PI * 3) / 2, 0, false);
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if (pointerDirection === RIGHT) {
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context.lineTo(width, (height - pointerHeight) / 2);
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context.lineTo(width + pointerWidth, height / 2);
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context.lineTo(width, (height + pointerHeight) / 2);
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}
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context.lineTo(width, height - bottomRight);
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context.arc(width - bottomRight, height - bottomRight, bottomRight, 0, Math.PI / 2, false);
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if (pointerDirection === DOWN) {
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context.lineTo((width + pointerWidth) / 2, height);
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context.lineTo(width / 2, height + pointerHeight);
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context.lineTo((width - pointerWidth) / 2, height);
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}
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context.lineTo(bottomLeft, height);
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context.arc(bottomLeft, height - bottomLeft, bottomLeft, Math.PI / 2, Math.PI, false);
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if (pointerDirection === LEFT) {
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context.lineTo(0, (height + pointerHeight) / 2);
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context.lineTo(-1 * pointerWidth, height / 2);
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context.lineTo(0, (height - pointerHeight) / 2);
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}
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context.lineTo(0, topLeft);
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context.arc(topLeft, topLeft, topLeft, Math.PI, (Math.PI * 3) / 2, false);
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context.closePath();
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context.fillStrokeShape(this);
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}
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getSelfRect() {
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const pointerWidth = this.pointerWidth(), pointerHeight = this.pointerHeight(), direction = this.pointerDirection(), width = this.width(), height = this.height();
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// The pointer base is centred on its side and can be longer than it.
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if (direction === UP || direction === DOWN) {
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return {
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x: Math.min(0, (width - pointerWidth) / 2),
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y: direction === UP ? -pointerHeight : 0,
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width: Math.max(width, pointerWidth),
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height: height + pointerHeight,
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};
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}
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if (direction === LEFT || direction === RIGHT) {
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return {
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x: direction === LEFT ? -pointerWidth : 0,
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y: Math.min(0, (height - pointerHeight) / 2),
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width: width + pointerWidth,
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height: Math.max(height, pointerHeight),
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};
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}
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return { x: 0, y: 0, width, height };
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}
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}
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Tag.prototype.className = 'Tag';
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_registerNode(Tag, true);
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/**
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* get/set pointer direction
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* @name Konva.Tag#pointerDirection
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* @method
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* @param {String} pointerDirection can be up, right, down, left, or none. The default is none.
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* @returns {String}
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* @example
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* tag.pointerDirection('right');
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*/
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Factory.addGetterSetter(Tag, 'pointerDirection', NONE);
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/**
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* get/set pointer width
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* @name Konva.Tag#pointerWidth
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* @method
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* @param {Number} pointerWidth
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* @returns {Number}
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* @example
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* tag.pointerWidth(20);
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*/
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Factory.addGetterSetter(Tag, 'pointerWidth', 0, getNumberValidator());
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/**
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* get/set pointer height
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* @method
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* @name Konva.Tag#pointerHeight
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* @param {Number} pointerHeight
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* @returns {Number}
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* @example
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* tag.pointerHeight(20);
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*/
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Factory.addGetterSetter(Tag, 'pointerHeight', 0, getNumberValidator());
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/**
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* get/set cornerRadius
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* @name Konva.Tag#cornerRadius
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* @method
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* @param {Number} cornerRadius
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* @returns {Number}
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* @example
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* tag.cornerRadius(20);
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*
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* // set different corner radius values
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* // top-left, top-right, bottom-right, bottom-left
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* tag.cornerRadius([0, 10, 20, 30]);
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*/
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Factory.addGetterSetter(Tag, 'cornerRadius', 0, getNumberOrArrayOfNumbersValidator(4));
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