I am using HoloViews version 1.12.0 . I am attempting to create a layout that contains two DynamicMaps, but I am getting the error:
WARNING:param.Warning: Layout contains HoloMaps which are not nested in the recommended format for accessing your data; calling .collate() on these objects will resolve any violations of the recommended nesting presented in the Composing Data tutorial ...
One of the DynamicMaps itself contains a layout that consists of a Radial Heat Map, and a Div. The other DynamicMap contains a Table object. The idea is to add some additional DynamicMaps to the layout, such that there are streams creating click through parent child relationship between the DynamicMaps.
I have run the .collate() function on both of the DynamicMaps, but it didn't return any output, and the error persists.
If I alter the one DynamicMap that contains the layout of the div and radial heat map, to just containing the one object or the other, the issue goes away.
Here is the data structures output for my layout.
:Layout
.DynamicMap.I :DynamicMap [ownership,survey_type,rep,approval,timeframe,nps_type]
.DynamicMap.II :DynamicMap [ownership,survey_type,rep,approval,timeframe,nps_type]
The http://holoviews.org/user_guide/Building_Composite_Objects.html user guide explains the order things need to be nested to work smoothly without collate:
A DynamicMap normally takes the same spot as a HoloMap in such a hierarchy.
I'm surprised that .collate() "didn't return any output", though; I don't think there is any version of .collate() in HoloViews that doesn't return something, so there's presumably some other problem.
Related
For the Qt App I'm writing, I'd like to have a list of clickable functions, which, when clicked will allow the user to supply required input arguments.
What I'm specifically looking for is a selection of widgets which provide a clean and intuitive interface for the following tasks:
User scrolls through a list of functions for performing computations (in my case, from glm).
Once a function is found, the user clicks on the item; a popup window opens, which specifies the required input arguments (e.g., vec3, vec4, etc.).
The idea here is that the functions themselves already exist: they just need an interface, which in a nutshell, provides a pseudo interpreter to process and output their results to a GLWidget, which will update the data passed accordingly by sending it to its corresponding shader.
I've looked at QListView, and its Widget variant, but it appears to be more suited towards filesystem data, such as images or text files, though I'm not quite sure. So far, it seems to be the only thing which could be considered as realistically usable in this scenario.
Is there a recommended way to do this? I'm fairly new to Qt in general, thus my knowledge is pretty limited.
The view isn't really important in your case. You need to create/reuse a adapted model.
This model have to contain the relation between what your view displays and the action that you want to launch.
For example, if your commands are text like bash commands, you can create a view that displays "list files", "Copy files" and a model that contains the data ("list files" = 'ls -l'), ("copy files" = 'ls -l'), etc.
You can store different data (using QVariant) in a same item with different roles: Qt::DisplayRole corresponds to the data that the view displays and Qt::UserRole what you want.
So, if you only have to store a command line associated to a name, you can store the name in the item with the Qt::DisplayRole and the command line as a QString (or other) using Qt::UserRole.
See QAbstractItemModel::data() and QAbstractItemModel::setData(), for more information.
I am trying to render a whole heap of vectors in the google earth plugin. I use the parseKml method to create my Kml Feature object and store it in an array. The code looks something like below. I loop over a list of 10,000 kml objects that I return from a database and draw it in the plugin.
// 'currentKml' is a kml string returned from my DB.
// I iterate over 10,000 of these
currentKmlObject = ge.parseKml(currentKml);
currentKmlObject.setStyleSelector(gex.dom.buildStyle({
line: { width: 8, color: '7fff0000' }
}));
ge.getFeatures().appendChild(currentKmlObject);
// After this, I store teh currentKml object in an array so
// I can manipulate the individual features.
This seems to work fine. But when I want to turn the visibility of all these features on or off at once, I have to iterate over all of these kml objects in my array and set their individual visibilities on or off. This is a bit slow. If I am zoomed out, I can slowly see each of the lines disappearing and it takes about 5 - 10 seconds for all of them to disappear or come back.
I was wondering if I could speed up this process by adding a layer and adding all my objects as children of this layer. This way I set the visibility of the whole layer on or off.
I have been unable to find out how to create a new layer in code though. If someone can point the appropriate methods, it would be great. I am not sure if a layer is the right approach to speed up the process either. If you also have any other suggestions on how I can speed up the process of turning on/off all these objects in the map at once, that would be very helpful as well.
Thanks in advance for you help.
Ok, found out how to do this by myself.
In the google earth extensions libarary I use the 'buildFolder' method.
var folder = gex.dom.buildFolder({ name: folderName });
ge.getFeatures().appendChild(folder);
Now, when I iterate over my object array, I add them to the folder instead using the following
folder.getFeatures().appendChild(currentKmlObject);
This way, later on I can turn the visibility on and off at the folder level using
folder.setVisibility(false); // or true
And this works quite well as well. IThere is no delay, I can see all the objects turning on and off at once. It is quite quick and performant.
I have a Shapefile map of Maryland separated by zipcode. What I'd like to do is color each area based on a value I'm looking up in a database. Currently, I'm using ASP.NET with the SharpMap package. The basic questions are:
1) How do I associate a shape with its zipcode? I can generate the list of zipcodes using SharpMap's ExecuteIntersectionQuery with the BoundingBox set as the extent of the map, but I have no idea how to then connect each row of the resulting table with the shape it represents.
2) Once I have access to an individual shape and know what color I want, how do I assign the color to the shape? In SharpMap, I can color a VectorLayer, but a VectorLayer is generated from a source .shp file, not a shape.
I'm open to using other free map packages besides SharpMap (so no ArcGIS), but for legal reasons I can't use GoogleMaps.
I feel like this should be relatively simple, but trying to find any decent resource for SharpMap is pretty difficult.
EDIT: Alright, I've made a lot of process just by reading over what documentation there is. By setting the FilterDelegate of ShapeFile, I can make a layer consist of only the rows where the zip code matches a certain value. Now my only problem is making the delegate filter look for a different zip code each time. Can I pass another parameter besides the FeatureDataRow? Should I resort to a global variable?
You'll need to use thematics to do this.
I'll assume you already have some code that configures your map and it's layers. Your shapefile is a VectorLayer.
VectorLayer shapefileLayer = GetMyShapefileLayer();
shapefileLayer.Theme = new SharpMap.Rendering.Thematics.CustomTheme(GetStyleForShape);
Then, method GetStyleForShape is called every time the map needs a style for rendering. It looks like this:-
private SharpMap.Styles.VectorStyle GetStyleForShape(SharpMap.Data.FeatureDataRow row, SharpMap.Layers.Layer layer)
{
}
In the method, you create and return a VectorStyle. The table data associated with the feature it's trying to render is passed as a parameter to this method.
So you can use the row parameter to get your zip code, do whatever logic you need to do to calculate it's style, configure that style and return it.
This method (potentially) gets called a lot, so consider storing the styles and reusing them, rather than recreating them every time.
Hope this helps.
In the Flash authoring environment I can edit a library symbol and all on-stage instances based upon it reflect the changes. How can I do the same thing in ActionScript? There seems to be no way to address a library symbol.
For example:
Inside Flash CS3, I have created a Square.swf file that has 100 instances of the library symbol Square.
Now, Square.swf is loaded into another file BlueSquare.swf and I want to change the Square symbol into a blue square so that all instances of Square become blue.
How do I do this using Actionscript?
Thanks for the help.
What's in a clip's library symbol is the author-time definition of that object - you can't change it at runtime. Instead the normal approach would be to dynamically change the contents (not definitions) of the clips you want to change, which can be done in various ways, but all the good ways of doing that involve making the dynamically-changing clip understand how to update its appearance. So you need to be able to re-author the changing clips to suit your needs.
If you're loading in an animation that somebody else made, and trying to go through and replace all instances of object A with object B, the only way to achieve that is to traverse through the content's display list looking for A, and when you find one, remove its children and replace them with the the contents of a B. Mind you, for animations that may not really solve your problem, since animations normally add and remove clips frequently, so at any given point you could replace all the "hand" clips with "hand2", but then a frame later new "hand" clips might come into existence. But short of opening up the SWF and changing the binary data inside, there's no other way to dynamically change all of a given object to something else unless the object knows how to change its contents.
If it is only about making sure that the square you are attaching is blue you could use the colorTransform to change its appearance:
var someSquare:Square = new Square();
someSquare.transform.colorTransform = new ColorTransform(0,0,0,1,0x00,0x00,0xff,0x00 );
addChild( someSquare );
Of course this does not change the color of all instances that you have already attached.
If you really wanted to change the actual SWF symbol in Actionscript the only way I see is to parse the swf with as3swf ( https://github.com/claus/as3swf/wiki ), find the shape tag of the symbol, change it and then load the ByteArray that contains the swf via loader.loadBytes() - but that's admittedly quite a complicated way and you can achieve the same result by simply putting some colorizing code into the shape symbol itself and then trigger the color change via an Event that is broadcasted by your main app.
Of course, if you make custom component, when you change it changes will appear on all instances of that component/class. Here's the example: http://livedocs.adobe.com/flex/3/html/intro_3.html
On the other hand, if you use modules whey pretty much do the same as swf-s you used in Flash, when you rebuild-recompile them changes will reflect on your main application which uses them. Here's th eexample for modules: http://blog.flexexamples.com/2007/08/06/building-a-simple-flex-module/
So MXML/AS component/class are your "symbols" which you can create or drop on stage on fly.
Modules are "movies" you can load and they run on their own with possibility to communicate to main movie.
The closest way of achieving this is to use Bitmaps. If you update the bitmapData they display, they will all update automatically.
However this approach is not good at all. You should maintain application state separately in an object model, and have the visualisation update, if the state changes.
What you want to do, is to misuse a feature for changing graphic appearence at design time, to change application state at runtime. In generally, ideas like these can be thought off as bad.
For example if you take the time to separate the state model and the visualisation layer, it will become fairly easy to save the game state on a server or to synchronize it with other clients to achieve multiuser features.
greetz
back2dos
If you are trying to build an Avatar and user can customize your Avatar parts e.g. hands, legs, face etc. and you want all these assets to be kept in separate swf file, that is pretty straightforward. You keep all the assets, in separate swf or one large swf file and load them at runtime. Now, maintain your Avatar object instance and place the child objects, which are chosen by the user.
You can create inside your class a static List with references all the created instances and then apply a change with static methods. For example:
package
{
import flash.display.MovieClip;
import flash.geom.ColorTransform;
public class Square extends MovieClip
{
public static var instances:Array = new Array();
public function Square():void
{
Square.instances.push(this); // This is the trick. Every time a square is created, it's inserted in the static list.
}
// This property gets the color of the current object (that will be the same of all others because the setter defined below).
public function get color():ColorTransform
{
return this.transform.colorTransform;
}
public function set color(arg:ColorTransform):void
{
// Sets the color transform of all Square instances created.
for each(var sqr:Square in Square.instances)
{
sqr.transform.colorTransform = arg;
}
}
}
}
what's the best way to remove a row (QTreeWidgetItem) from a QTreeWidget?
The QTreeWidget content has been set by:
myQTreeWidget->insertTopLevelItems(0, items); // items = QList<QTreeWidgetItem*>
then I remove an item from my QList "items" and I try to clear/reset the QTreeWidget
packList->clear();
packList->insertTopLevelItems(0, items);
but my app crashes here!
Suggestions?
Your problem is that calling packList->clear() deletes the tree widget items contained by the tree. (See the documentation about QTreeWidget::clear(), which includes a note about the items being removed from the tree before deleting.) You'll either need to find a way to remove the items, or not maintain a list of them separately from the tree.
On a slightly-related note, if you are trying to keep track of other data along with the tree, I'd recommend you try to use the models paradigm. In non-trivial cases, it has usually been worth my while to convert to that technique, rather than using the widgets/items.
From what this documentation says, you should be able to do it with:
packList->takeTopLevelItem(index);
Which returns removes and returns the item at the supplied index.