Mask.html
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<!DOCTYPE html>
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<pre class="prettyprint lang-js"><span id='Ext-chart-Mask'>/**
</span> * Defines a mask for a chart's series.
* The 'chart' member must be set prior to rendering.
*
* A Mask can be used to select a certain region in a chart.
* When enabled, the `select` event will be triggered when a
* region is selected by the mask, allowing the user to perform
* other tasks like zooming on that region, etc.
*
* In order to use the mask one has to set the Chart `mask` option to
* `true`, `vertical` or `horizontal`. Then a possible configuration for the
* listener could be:
*
* items: {
* xtype: 'chart',
* animate: true,
* store: store1,
* mask: 'horizontal',
* listeners: {
* select: {
* fn: function(me, selection) {
* me.setZoom(selection);
* me.mask.hide();
* }
* }
* }
* }
*
* In this example we zoom the chart to that particular region. You can also get
* a handle to a mask instance from the chart object. The `chart.mask` element is a
* `Ext.Panel`.
*
*/
Ext.define('Ext.chart.Mask', {
requires: [
'Ext.chart.MaskLayer'
],
<span id='Ext-chart-Mask-cfg-mask'> /**
</span> * @cfg {Boolean/String} mask
* Enables selecting a region on chart. True to enable any selection,
* 'horizontal' or 'vertical' to restrict the selection to X or Y axis.
*
* The mask in itself will do nothing but fire 'select' event.
* See {@link Ext.chart.Mask} for example.
*/
<span id='Ext-chart-Mask-method-constructor'> /**
</span> * Creates new Mask.
* @param {Object} [config] Config object.
*/
constructor: function(config) {
var me = this,
resizeHandler;
me.addEvents('select');
if (config) {
Ext.apply(me, config);
}
if (me.enableMask) {
me.on('afterrender', function() {
//create a mask layer component
var comp = new Ext.chart.MaskLayer({
renderTo: me.el,
hidden: true
});
comp.el.on({
'mousemove': function(e) {
me.onMouseMove(e);
},
'mouseup': function(e) {
me.resized(e);
}
});
//create a resize handler for the component
resizeHandler = new Ext.resizer.Resizer({
el: comp.el,
handles: 'all',
pinned: true
});
resizeHandler.on({
'resize': function(e) {
me.resized(e);
}
});
comp.initDraggable();
me.maskType = me.mask;
me.mask = comp;
me.maskSprite = me.surface.add({
type: 'path',
path: ['M', 0, 0],
zIndex: 1001,
opacity: 0.7,
hidden: true,
stroke: '#444'
});
}, me, { single: true });
}
},
resized: function(e) {
var me = this,
bbox = me.bbox || me.chartBBox,
x = bbox.x,
y = bbox.y,
width = bbox.width,
height = bbox.height,
box = me.mask.getBox(true),
max = Math.max,
min = Math.min,
staticX = box.x - x,
staticY = box.y - y;
staticX = max(staticX, x);
staticY = max(staticY, y);
staticX = min(staticX, width);
staticY = min(staticY, height);
box.x = staticX;
box.y = staticY;
me.fireEvent('select', me, box);
},
onMouseUp: function(e) {
var me = this,
bbox = me.bbox || me.chartBBox,
sel = me.maskSelection;
me.maskMouseDown = false;
me.mouseDown = false;
if (me.mouseMoved) {
me.onMouseMove(e);
me.mouseMoved = false;
me.fireEvent('select', me, {
x: sel.x - bbox.x,
y: sel.y - bbox.y,
width: sel.width,
height: sel.height
});
}
},
onMouseDown: function(e) {
var me = this;
me.mouseDown = true;
me.mouseMoved = false;
me.maskMouseDown = {
x: e.getPageX() - me.el.getX(),
y: e.getPageY() - me.el.getY()
};
},
onMouseMove: function(e) {
var me = this,
mask = me.maskType,
bbox = me.bbox || me.chartBBox,
x = bbox.x,
y = bbox.y,
math = Math,
floor = math.floor,
abs = math.abs,
min = math.min,
max = math.max,
height = floor(y + bbox.height),
width = floor(x + bbox.width),
posX = e.getPageX(),
posY = e.getPageY(),
staticX = posX - me.el.getX(),
staticY = posY - me.el.getY(),
maskMouseDown = me.maskMouseDown,
path;
me.mouseMoved = me.mouseDown;
staticX = max(staticX, x);
staticY = max(staticY, y);
staticX = min(staticX, width);
staticY = min(staticY, height);
if (maskMouseDown && me.mouseDown) {
if (mask == 'horizontal') {
staticY = y;
maskMouseDown.y = height;
posY = me.el.getY() + bbox.height + me.insetPadding;
}
else if (mask == 'vertical') {
staticX = x;
maskMouseDown.x = width;
}
width = maskMouseDown.x - staticX;
height = maskMouseDown.y - staticY;
path = ['M', staticX, staticY, 'l', width, 0, 0, height, -width, 0, 'z'];
me.maskSelection = {
x: width > 0 ? staticX : staticX + width,
y: height > 0 ? staticY : staticY + height,
width: abs(width),
height: abs(height)
};
me.mask.updateBox(me.maskSelection);
me.mask.show();
me.maskSprite.setAttributes({
hidden: true
}, true);
}
else {
if (mask == 'horizontal') {
path = ['M', staticX, y, 'L', staticX, height];
}
else if (mask == 'vertical') {
path = ['M', x, staticY, 'L', width, staticY];
}
else {
path = ['M', staticX, y, 'L', staticX, height, 'M', x, staticY, 'L', width, staticY];
}
me.maskSprite.setAttributes({
path: path,
fill: me.maskMouseDown ? me.maskSprite.stroke : false,
'stroke-width': mask === true ? 1 : 3,
hidden: false
}, true);
}
},
onMouseLeave: function(e) {
var me = this;
me.mouseMoved = false;
me.mouseDown = false;
me.maskMouseDown = false;
me.mask.hide();
me.maskSprite.hide(true);
}
});
</pre>
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