I want to drag a slider and when it is dropped, it calls a function, but when I use DragGesture my slider does not work any more.
I have read the Apple documentation, but I couldn't find out how to do this.
Try the onEditingChanged closure parameter. It receives a Bool set to true when the change begins and false when the change ends.
Slider(value: $value, in: 0...200, step: 10, onEditingChanged: { bool in
print("\(bool)")
})
I have a div, to which I applied Dojo dojo/dnd/Moveable. But, I'd like to prevent the user from dragging the div offscreen. So, I think I need to implement dojo/dnd/move/boxConstrainedMoveable.
I'm starting with this:
var dnd = new Moveable(this.domNode, {
'handle': this.titleNode
});
There's a similar SO question here:
Constrain a moveable object in Dojo. Applying that answer, I get something like this:
var dnd = new move.boxConstrainedMoveable(
'handle': this.titleNode
constraints: {
l: 0,
t: 20,
w: 500,
h: 500
},
within: true
);
But, I just can't understand how the bounding box works. I simply want the div to stay inside the window. I've tried implementing a few things with the window box, the div's margin box. Nothing's worked, and all I've made is a big mess.
I read the docs here:
http://dojotoolkit.org/api/?qs=1.9/dojo/dnd/move.boxConstrainedMoveable
Has anyone done this with Dojo? I'd be very appreciate of an example.
I looked up some old code I have and I did implement this type of movable once. This was written against Dojo 1.7, so things may have changed in 1.9. Fiddle demonstration: https://jsfiddle.net/4ev1daqr/26/
The main difference between your attempted solution and this is that the constraints property in the moveable needs to be a function rather than a static bounding box. When using the boxConstrainedMoveable module, the static bounding box should be assigned to a box property, rather than the constraints property.
This is actually a nice design, IMHO, because it allows the constraints to react to changes in application state, e.g. hiding a sidebar or moving a splitter, but it does make the simple case a bit more difficult to get working.
define(["dojo/_base/declare",
"dojo/dnd/move",
"dojo/dom",
"dojo/_base/window",
"dojo/dom-style",
"dojo/dom-geometry",
],
function (declare, move, dom, win, domStyle, domGeom) {
return declare( "my/dnd/move/BodyConstrainedMoveable", [move.constrainedMoveable], {
markupFactory: function(params, node){
return new this(node, params);
},
constructor: function(node, params) {
// Constrain the node to be within the body
this.constraints = function() {
var n = win.body(),
s = domStyle.getComputedStyle(n),
mb = domGeom.getMarginBox(n, s);
if ( this.node ) {
var menubox = domGeom.getMarginBox(this.node);
mb.w -= menubox.w;
mb.h -= menubox.h;
}
return mb;
};
}
})});
Let's say we have a simple Backbone View, like this:
class MyView extends Backbone.View
events:
'click .save': 'onSave'
onSave: (event) ->
event.preventDefault()
# do something interesting
I want to test that event.preventDefault() gets called when I click on my element with the .save class.
I could test the implementation of my callback function, pretty much like this (Mocha + Sinon.js):
it 'prevents default submission', ->
myView.onSave()
myView.args[0][0].preventDefault.called.should.be.true
I don't think it's working but this is only to get the idea; writing the proper code, this works. My problem here is that this way I'm testing the implementation and not the functionality.
So, my question really is: how can I verify , supposing to trigger a click event on my .save element?
it 'prevents default submission', ->
myView.$('.save').click()
# assertion here ??
Thanks as always :)
Try adding a listener on the view's $el, then triggering click on .save, then verify the event hasn't bubbled up to the view's element.
var view = new MyView();
var called = false;
function callback() { called = true; }
view.render();
// Attach a listener on the view's element
view.$el.on('click', callback);
// Test
view.$('.save').trigger('click');
// Verify
expect(called).toBeFalsy();
So you want to test that preventDefault is called when a click event is generated, correct?
Couldn't you do something like (in JavaScript. I'll leave the CoffeeScript as an exercise ;)):
var preventDefaultSpy;
before(function() {
preventDefaultSpy = sinon.spy(Event.prototype, 'preventDefault');
});
after(function() {
preventDefaultSpy.restore();
});
it('should call "preventDefault"', function() {
myView.$('.save').click();
expect(preventDefaultSpy.callCount).to.equal(1);
});
You might want to call preventDefaultSpy.reset() just before creating the click event so the call count is not affected by other things going on.
I haven't tested it, but I believe it would work.
edit: in other words, since my answer is not that different from a part of your question: I think your first approach is ok. By spying on Event.prototype you don't call myView so it's acting more as a black box, which might alleviate some of your concerns.
I have a createTable function that receives a collection of nodes (or an array of nodes), then I am able to draw a table.
I am switching to cytoscape.js now, and I really don't know how to have a listener to my select event properly.
Doing this:
cy.on('select', 'node', function(event){
window["selectedNodes"] = cy.$('node:selected');
});
I do have all information I need to draw my table, but I cannot call my createTable function inside it because it will call my function several times (once per node selected).
I've already tried to use cy.on and cy.once, but without success.
Here is my question:
How can I have a listener to my selection event, get ALL selected nodes and call (only once) my createTable function ?
I can also obtain all selected node using this:
cy.elements('node:selected', console.log("my CallBack function"));
But as it is outside an event listener (select / click) it doesn't work as I need.
Please, any help is appreciated.
Thank you.
Debounce your callback so if multiple events come in one after another, then they are effectively batched:
var timeout;
cy.on('select', 'node', function(event){
clearTimeout( timeout );
timeout = setTimeout(function(){
window["selectedNodes"] = cy.$('node:selected');
// and so on...
}, 100); // may have to adjust this val
});
I have a spider plot in using the graphing library of Dojo defined like this:
require([
"dojox/charting/Chart",
"dojox/charting/themes/Claro",
"dojox/charting/plot2d/Spider",
"dojox/charting/action2d/Tooltip",
"dojox/charting/widget/SelectableLegend",
"dojox/charting/axis2d/Default"
], function (Chart, theme, Spider, Tooltip, Legend, Default) {
var chart = new Chart(element).setTheme(theme).addPlot("default", {
type: Spider,
radius: 200,
fontColor: "black",
labelOffset: "-20"
});
var colors = ["blue", "red", "green", "yellow", "purple", "orange", "teal",
"maroon", "olive", "lime", "aqua", "fuchsia"];
$.each(factors, function (index, factor) {
chart.addAxis(factor.name, {
type: Default,
min: factor.min,
max: factor.max
});
});
$.each(presets, function (pIndex, preset) {
var data = [];
$.each(factors, function (fIndex, factor) {
data[factor.name] = preset.values[fIndex];
});
chart.addSeries(preset.short, data, {
fill: colors[pIndex % colors.length]
});
});
new Tooltip(chart, "default");
chart.render();
new Legend({
chart: chart,
horizontal: false
}, $(element).next(".legend")[0]);
});
I add a series for every member of an array called presets and I use a selectable legend that lets the user turn them on or off as they want. However, what I can't seem to find in the docs is how to start a series in the unselected, not visible state? What I ideally want to do is cap the number of series visible when the page loads because in some cases I have up to 14 presets and it just looks a mess until the user deselects a bunch. So I'd like to have, say, every preset above the first 5 be hidden at the start.
Here's a crude fiddle I've knocked to demonstrate. What I want is to have some of the series unselected when the plot is first displayed.
Update: I tried adding this after adding my series:
var checkboxes = $(".dijitCheckBoxInput").each((index, elem) => {
if (index > 4) {
elem.click();
}
});
Which works, but seems very fragile. If they change the class assigned to checkboxes, it'll break. Also, it prohibits me using more than one set of dojo checkboxes because I don't have a good way to tell the difference. (Note, the IDs of the checkboxes added by the SelectableLegend are dijit_form_CheckBox_0, dijit_form_CheckBox_1, etc, which also gives no useful information as to what they are related to). I thought I might be able to use the legend placeholder div as a way to select the descendant checkboxes, but it appears that Dojo replaces the placeholder entirely with a table.
i looked into the dojo code and found the area in which the shapes are toggled on & off whitin the SelectableLegend.js :
var legendCheckBox = query(".dijitCheckBox", legend)[0];
hub.connect(legendCheckBox, "onclick", this, function(e){
this._toggle(shapes, i, legend.vanished, originalDyn, seriesName, plotName);
legend.vanished = !legend.vanished;
e.stopPropagation();
});
The toggling process is very complex and is based on many local attributes:
_toggle: function(shapes, index, isOff, dyn, seriesName, plotName){
arrayUtil.forEach(shapes, function(shape, i){
var startFill = dyn.fills[i],
endFill = this._getTransitionFill(plotName),
startStroke = dyn.strokes[i],
endStroke = this.transitionStroke;
if(startFill){
if(endFill && (typeof startFill == "string" || startFill instanceof Color)){
fx.animateFill({
shape: shape,
color: {
start: isOff ? endFill : startFill,
end: isOff ? startFill : endFill
}
}).play();
}else{
shape.setFill(isOff ? startFill : endFill);
}
}
if(startStroke && !this.outline){
shape.setStroke(isOff ? startStroke : endStroke);
}
}, this);
}
I tried also checking & unchecking the dijit/form/Checkbox in a legend manually, but that does not trigger the _toggle function in any case, even if you do a render() / fullrender() on the chart.
With that in mind it seems that there is no other possibilty to toggle the series on and off than by firing the onclick events manually.
To make your code less fragile, you could access the Checkbox widgets within the legend manually using:
query(".dijitCheckBox", legend); // Should deliver an array containing
the widgets.
and triggering the onclick event on them. Their keynumber in the array should correspond to the order the series where added...
Dojo is a fine piece of work, please dont stop working with it !
dojox/charting/Series has an attribute called dirty which according to the API docs is a "flag indicating whether or not this element needs to be rendered".
Alternately, if you are limiting the display of some series you can write a separate interface for adding them. For example, loop over the first 5. Then create a select box or list of check boxes with all entries and an onchange event that calls chart.addSeries.
Keeping a reference to each series you create will allow you to later call destroy() or destroyRecursive() on it if the user no longer wishes it displayed.
So while ideally you could toggle the display of these series, the worst case senerio is that you just add, destroy, and read based on some user input.
Using a templated widget will allow you to keep this interface and the chart tightly linked and support reuse.
BTW, consider using "dojo/_base/array" and "dojo/query" in place of the jquery
I think i've got it !
I found another way to access the checkboxes ! It's the same way dojo uses internally to connect the "toggle code" to the onclick event. First take a look at this from SelectableLegend.js (Lines 150 - 156):
// toggle action
var legendCheckBox = query(".dijitCheckBox", legend)[0];
hub.connect(legendCheckBox, "onclick", this, function(e){
this._toggle(shapes, i, legend.vanished, originalDyn, seriesName, plotName);
legend.vanished = !legend.vanished;
e.stopPropagation();
});
It looks like they use the ".dijitCheckBox" class to find the checkbox dom element and connect to it using dojo/connect. Now based on that, i made this function:
function toggleSeries (legend,num) {
dojo.query("*",legend.legends[num])[0].click();
dijit.findWidgets(legend.legends[num])[0]._onClick(); }
It doesn't use any class definition (because of the *) and it accesses the areas where the checkboxes are from within the SelectableLegend. It needs the SelectableLegend and the number of the series you want to deactivate as parameters. Here the jsfiddle example with this function & hiding all 4 of your series with it:
http://jsfiddle.net/luciancd/92Dzv/17/
Also please notice the "onDomReady" Option in jsfiddle, without it: doesnt work in IE.
And the ready function within the code !
Lucian
I have updated your code http://jsfiddle.net/92Dzv/18/
Here is the key to toogle.
dom.byId(le._cbs[0].id).click();
dom.byId(le._cbs[2].id).click();
Choose the index of your legend and set to _cbs.
By this way le._cbs[0].id you will get the real id of checkbox (that inside in the widget) and then just use click()
Note : le is came from here.
var le = new Legend({
chart: chart,
horizontal: false
}, legend);