How can I generate a tooltip on chart mouse over in JFreeChart?
I tried this:
chartPanel.setToolTipText("this is the string");
but this does not work. Am I supposed to do something else before? Something like this:
chartPanel.createToolTip().
I am calling these methods in the chartMouseMoved event.
Most ChartFactory methods include a boolean tooltips parameter. Just look in the source for your factory of choice to see how to instantiate a default tooltip generator suitable for the designated renderer. You shouldn't need to handle the events yourself.
Addendum: As you are using createXYLineChart, an instance of StandardXYToolTipGenerator is supplied by default. The DEFAULT_TOOL_TIP_FORMAT is {0}: ({1}, {2}); the MessageFormat symbols represent the dataset, series and item, respectively. You can use these symbols in your own generator, as shown in this XYItemLabelGenerator, or you can override generateToolTip() to return anything at all.
Addendum: Here's an example that shows just the dataset:
XYPlot plot = chart.getXYPlot();
XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot.getRenderer();
renderer.setLegendItemToolTipGenerator(
new StandardXYSeriesLabelGenerator("Legend {0}"));
Related
I found JavaFX to be suprisingly expressive after getting over the fact that I had to redeclare every field as property so I am a little stumped and would like to know if there is a better, more idomatic way of binding a boolean to some more complex operation like adding and removing style classes.
In this example I have a project that maybe valid or not and I want the font color of the tab to indicate which it is. I am doing this by adding and removing the error style class:
val errorSwitch = { valid : Boolean ->
logger.debug {"errorSwitcher: $valid"}
if( valid) tab.styleClass.remove("error")
else tab.styleClass.add("error")
Unit
}
product.isValid.onChange (errorSwitch)
errorSwitch(product.isValid.value)
What I don't like here is that I have to call the function once myself to start with because "onChange" obviously does not trigger unless the isValid actually changes. It's a small thing but I am wondering if there isn't a better way with bindings because thats what I want: the presence of the error class should be bound to "isValid"
In TornadoFX the best way to achieve this is to use the toggleClass function, which will automatically add or remove a given class based on a boolean observable value. Therefore you can simply say:
tab.toggleClass(Styles.error, product.isValid)
This example requires you to use the Type Safe CSS feature of TornadoFX. Read more about Type Safe CSS in the guide :)
I have a list of features and a vector layer and I need to know, whether each feature is within the bounds of the view of the map or not.
I'm using openlayers v3.9.0 and in the corresponding documentation there is a function containsExtent() (link) which takes an extent and returns a boolean. Seems to be exactly the function I'm looking for. But an error is thrown saying that containsExtent is not a function.
Uncaught TypeError: extent.containsExtent is not a function
code snippet:
// someVectorSource is of type ol.source.Vector
// allMyFeatures is an array of features of type ol.Feature
var extent = someVectorSource.getExtent();
_.each(allMyFeatures, function(feature) {
if (extent.containsExtent(feature.getGeometry().getExtent())) {
// do something
}
});
What is the problem here?
If the is a better way, to get only those features which are within the extent, in a single call without iterating through the list, would be even better.
The correct syntax is:
ol.extent.containsExtent(extent, feature.getGeometry().getExtent())
If you look closer at the doc page, you'll see that the method is a static one, not part of a ol.Extent object. FYI, there's no actual ol.Extent object in ol3. It's just an array of 4 numbers. I think ol.Extent is just a reference for the compiler.
HTH
I am using angular ui grid. At first I implemented this in a controller and it works fine after all my customization. As I am using multiple grids I cannot write a long controller each time. So, I converted it to factory. I kept the common function in factory and column definition and data in controller. Now when I use this factory in more than 1 controllers, the last controller is overriding all others.
1) Is it correct to make this grid in a factory?
2) If yes how do I overcome this problem?
3) By using factory for this grid, my gridObj.gridApi.pagination.on is throwing error(gridObj is the singleton object that I am returning).
Any suggestion is welcome. Thanks a lot in advance.
You should use a Directive instead. Factories create a single Instant (see Angular Provider Documentation and wont create a private scope, which you need to not override your data.
Note: All services in Angular are singletons.
But Directives provide a private scope and create new instances every time they are called in HTML if you want them to.
//directive
scope: { // this option creates isolated scopes
something : '=',
},
I created a Plunkr showcasing a possible setup. For some more written details please see my answer from few days ago.
Your HTML might look like this afterwards
<my-grid options="all.firstOptions" class="grid"></my-grid>
Where my-grid is your directive and options="" are your special settings (and whatever else you wish to use in the directive). In your directive you declare the default settings and merge them with the special ones.
scope.gridOptions = {
data: scope.options.data, //private scoped from options : '=',
columnDefs: scope.options.colDef || defaultColDef, // optional setting or default setting
// ... some more default data
};
If you have any specific questions, let me know.
I have common code that I want in various events for our standard jqGrid configuration.
I use $.extend($.jgrid.defaults, { }); to set some code for the following:
loadError()
beforeRequest()
loadComplete()
gridComplete()
Now, when I define an instance of my grid, there is a potential that I would like to execute more code in any of these events.
My initial solution was to have global variables, e.g.: loadCompleteEx() and if they are defined, call them at the end of the default method calls. This was great if I only had one grid on the page, but I am trying to implement a solution that would work regardless of how many grids are on the page.
Is there some way to hook in and add a method to execute when any of these events are fired? I'm using jqGrid 4.1.2 and jQuery 1.6.
Thanks in advance for your help!
You can .bind() your own functions to events, so that your function executes with the event. You could use this to bind different events to each grid, or bind one function to every grid at once.
.bind() also allows binding to standard javascript events, custom events, or even undefined strings which you later call with .trigger().
It needs to be attached after a selector, which can select a specific grid or multiple grids in your case.
$('#Your-Grid-Selector').bind('eventToBind', functiontoBind() {
alert('Triggered eventToBind');
});
jQuery Documentation
Edit: This question may be a duplicate of this SO Question, which has a good solution you can use for this very issue.
I would like to do coloring in Eclipse without using the presentation reconciler. Therefore, first, I need to figure out how to associate a TextPresentation object with either my editor or document, but I am having difficulty finding out how to link it either of those. Normally, the CreatePresentation in the IPResentationReconciler interface would give the style range to the textpresentation, and from there Eclipse would know what to do with that presentation object. Is there some way to use a TextPresentation object without the use of PresentationReconciler? It would be nice if I could do coloring without the use of reconciler. Thank you.
I finally figured out how to achieve the coloring without the use of Reconcilers.
I discovered that first I needed a way to obtain a reference to my SourceViewer object, as I am extending TextEditor. I also discovered that I could implement the TextListener interface and add my own listener to the SourceViewer object. One must be careful, however, as calling the getSourceViewer() method can result in null if not called at the appropriate spot. Originally, I overwrote the init(...) function in my editor class and made the getSourceViewer() call, but it still resulted in null. After doing a bit of research, I discovered that I could properly obtain a reference to the SourceViewer object by overriding the createPartControl method. I first call super.createPartControl(...) and then make a call to getSourceViewer(). After I obtained that reference, I used that with my listener class I created and was able to do the coloring myself with the setTextColor method the SourceViewer object has. Hope this helps others in the same situation.