How to set custom vertex using mxgraph - mxgraph

We are writing a program to generate a graph using mxgraph. Our requirement is "we need to display an image as a vertex". We have tried many codes, but we are not able to get the image. (The path of the image is right) We are able to chande the shape of the node and add colour, but not able to include image as the vertex. our code is as follows
Document xmlDocument = mxDomUtils.createDocument();
Element sourceNode = xmlDocument.createElement("Source");
Element targetNode = xmlDocument.createElement("Target");
Element subtargetNode = xmlDocument.createElement("Subtarget");
mxGraph graph = new mxGraph();
Object parent = graph.getDefaultParent();
graph.getModel().beginUpdate();
try{
Object v1 = graph.insertVertex(parent, null, "source", 20, 20,80, 30,"shape=ellipse");
Object v2 = graph.insertVertex(parent, null, "destination", 200, 20,80, 30,"shape=image;image=H:\\mywork\\mxgraph\\bin\\mypack\\bg2.jpg");
graph.insertEdge(parent, null, "", v1,v2,"startArrow=none;endArrow=diamond;strokeWidth=4;strokeColor=#66FF00");
}
Please guide us as to what has to be corrected in the above code to get an image as my vertex.

Except for the path of the image I don't see any problem in the code. Even though you are confident enough, just cross check the path of the image. Open it in developers tool and check whether you are actually able to access the image or not. Try to access image directly from the url.
Any way here is the recommended way of applying styling on mxCells.
Document xmlDocument = mxDomUtils.createDocument();
Element sourceNode = xmlDocument.createElement("Source");
Element targetNode = xmlDocument.createElement("Target");
Element subtargetNode = xmlDocument.createElement("Subtarget");
mxGraph graph = new mxGraph();
Object parent = graph.getDefaultParent();
var style = new Object();
style[mxConstants.STYLE_SHAPE] = mxConstants.SHAPE_IMAGE;
style[mxConstants.STYLE_PERIMETER] = mxPerimeter.RectanglePerimeter;
style[mxConstants.STYLE_IMAGE] = 'images/bg2.jpg';
style[mxConstants.STYLE_FONTCOLOR] = '#FFFFFF';
graph.getStylesheet().putCellStyle('image', style)
graph.getModel().beginUpdate();
try{
Object v1 = graph.insertVertex(parent, null, "source", 20, 20,80, 30,"shape=ellipse");
Object v2 = graph.insertVertex(parent, null, "destination", 200, 20,80, 30,"image");
graph.insertEdge(parent, null, "", v1,v2,"startArrow=none;endArrow=diamond;strokeWidth=4;strokeColor=#66FF00");
}

Related

mxGraph how to use edge in different way

I trying to create a network architecture using vertex and edge objects from mxGraph.
Now in first image ZCU_08_01 is connected to ZCU_01_01 as you see.
Is possible the modification using edges like in next image ? And if possible, how? (of course assuming straight line sections not "hand made" :) )
The edge is defined:
var E33 = graph.insertEdge(parent, null, '', ID618, ID620,'strokeColor=#FF0000;');
and the style definition for edges is:
style = graph.getStylesheet().getDefaultEdgeStyle();
style[mxConstants.STYLE_EDGE] = mxConstants.EDGESTYLE_ORTHOGONAL;
style[mxConstants.STYLE_EDGE] = mxConstants.EDGESTYLE_SIDETOSIDE;
style[mxConstants.STYLE_ENDARROW] = mxConstants.NONE;
style[mxConstants.STYLE_ROUNDED] = true;
Thank in advance

Find the co-ordinates of matching image using sikuli in java

I need to get the co-ordinates of matched image within the actualImage so that I can perform operations on it. However, I tried below two approaches,but both doesn't seem to work:
Approach 1:
Using below, I'm able to find a match but co-ordinates returned are just the width & height of image to be matched(which I already know). I want to get the position of the same within actual image.
BufferedImage actualImg = ImageIO.read(new File("C:/Images/SrcImg.PNG"));
ImageTarget actualTgt = new ImageTarget(actualImg);
BufferedImage searchImg = ImageIO.read(new File("C:/Images/TgtImg.PNG"));
ImageTarget searchTgt = new ImageTarget(searchImg);
ScreenRegion scrReg = new StaticImageScreenRegion(actualTgt.getImage());
ScreenRegion resReg = scrReg.find(searchTgt);
ScreenLocation center = resReg.getCenter();
System.out.println(":getElementFromImage: x_loc,y_loc =["+center.getX()+","+center.getY()+"]");
Approach 2:
In below code I tried with sikulix Finder. However, with this src.hasNext() returned true BUT src.next() threw nullpointer exception.Not sure what is the problem here:
Finder src = new Finder("C:/Images/SrcImg.PNG");
Pattern pat = new Pattern("C:/Images/TgtImg.PNG").similar(0.5);
src.find(pat);
Match m;
while( src.hasNext())
m = src.next();
src.destroy();
java.lang.NullPointerException
at org.sikuli.script.Finder.next(Finder.java:484)
at com.work.ImageFinder.main(ImageFinder.java:38)
I already spent good amount of time to make this work. Any help would be much appreciated.
Thanks!
It works fine after passing the Region to Finder like below:
Finder src = new Finder("C:/Images/SrcImg.PNG", new Region(0,0,<width>,<height>))
Pattern pat = new Pattern("C:/Images/TgtImg.PNG").similar(0.5);
src.find(pat);
Match m;
while( src.hasNext())
m = src.next();
src.destroy();
More details can be found below link:
Is it possible to use Sikuli to assert that images are the same in GUI-less mode?

Is there a simple way to have a local webpage display a variable passed in the URL?

I am experimenting with a Firefox extension that will load an arbitrary URL (only via HTTP or HTTPS) when certain conditions are met.
With certain conditions, I just want to display a message instead of requesting a URL from the internet.
I was thinking about simply hosting a local webpage that would display the message. The catch is that the message needs to include a variable.
Is there a simple way to craft a local web page so that it can display a variable passed to it in the URL? I would prefer to just use HTML and CSS, but adding a little inline javascript would be okay if absolutely needed.
As a simple example, when the extension calls something like:
folder/messageoutput.html?t=Text%20to%20display
I would like to see:
Message: Text to display
shown in the browser's viewport.
You can use the "search" property of the Location object to extract the variables from the end of your URL:
var a = window.location.search;
In your example, a will equal "?t=Text%20to%20display".
Next, you will want to strip the leading question mark from the beginning of the string. The if statement is just in case the browser doesn't include it in the search property:
var s = a.substr(0, 1);
if(s == "?"){s = substr(1);}
Just in case you get a URL with more than one variable, you may want to split the query string at ampersands to produce an array of name-value pair strings:
var R = s.split("&");
Next, split the name-value pair strings at the equal sign to separate the name from the value. Store the name as the key to an array, and the value as the array value corresponding to the key:
var L = R.length;
var NVP = new Array();
var temp = new Array();
for(var i = 0; i < L; i++){
temp = R[i].split("=");
NVP[temp[0]] = temp[1];
}
Almost done. Get the value with the name "t":
var t = NVP['t'];
Last, insert the variable text into the document. A simple example (that will need to be tweaked to match your document structure) is:
var containingDiv = document.getElementById("divToShowMessage");
var tn = document.createTextNode(t);
containingDiv.appendChild(tn);
getArg('t');
function getArg(param) {
var vars = {};
window.location.href.replace( location.hash, '' ).replace(
/[?&]+([^=&]+)=?([^&]*)?/gi, // regexp
function( m, key, value ) { // callback
vars[key] = value !== undefined ? value : '';
}
);
if ( param ) {
return vars[param] ? vars[param] : null;
}
return vars;
}

Get physical screen(display) resolution. Windows Store App

I need current display resolution. How can i get this? I know about Window.Current.Bounds, but application can worked in windows mode.
what do you mean VisibleBounds is not working on Deskptop?
I tried in my win10 UWP program, it works fine. I can get my desktop resotion like below:
var bounds = ApplicationView.GetForCurrentView().VisibleBounds;
var scaleFactor = DisplayInformation.GetForCurrentView().RawPixelsPerViewPixel;
var size = new Size(bounds.Width * scaleFactor, bounds.Height * scaleFactor);
Besides, if you are using DX in store app, you can create an IDXGIFactory object and use it to enumerate the available adapters. Then call IDXGIOutput::GetDisplayModeList to retrieve an array of DXGI_MODE_DESC structures and the number of elements in the array. Each DXGI_MODE_DESC structure represents a valid display mode for the output. e.g.:
UINT numModes = 0;
DXGI_MODE_DESC* displayModes = NULL;
DXGI_FORMAT format = DXGI_FORMAT_R32G32B32A32_FLOAT;
// Get the number of elements
hr = pOutput->GetDisplayModeList( format, 0, &numModes, NULL);
displayModes = new DXGI_MODE_DESC[numModes];
// Get the list
hr = pOutput->GetDisplayModeList( format, 0, &numModes, displayModes);
Please let me know if you need further information.

Masked images not displaying in AS3

I am trying to mask an image on another so that I only view the specific portion of the unmasked image through the masked one. My problem is that I cannot see anything on the screen.. no Image, no effect at all
cardMask = new Image(Root.assets.getTexture("card_mask"));
cardMask.y = Constants.STAGE_HEIGHT*0.40;
cardMask.x = Constants.STAGE_WIDTH *0.48;
trace("it's add mask");
cardLight = new Image(Root.assets.getTexture("card_light_mask"));
cardLight.y = Constants.STAGE_HEIGHT*0.46;
cardLight.x = Constants.STAGE_WIDTH *0.48;
cardLight.mask=cardMask;
maskedDisplayObject = new PixelMaskDisplayObject(-1,false);
maskedDisplayObject.addChild(cardLight);
maskedDisplayObject.x=cardLight.x;
maskedDisplayObject.y=cardLight.y;
maskedDisplayObject.mask=cardMask;
maskedDisplayObject.blendMode = BlendMode.SCREEN;
addChild(maskedDisplayObject);
First, for masking an object the mask object should also be added to the display list. Your code does not add cardMask to display list anywhere. Second, if your maskedDisplayObject should be visible at all times, the mask should be assigned not to it, but to some other object which displayed part you desire to control. And third, it is also possible that this.stage is null, therefore the entire tree (this -> maskedDisplayObject -> cardLight) is plain not rendered. You need to check all three of these conditions to get something displayed.
Also, if you desire cardLight as an object to move independently of maskedDisplayObject, you should add it to this instead, and check that it's displayed on top of maskedDisplayObject (call addChild(cardLight) after addChild(maskedDisplayObject)).
This all totals to this code:
trace("Stage is null:", (this.stage==null)); // if this outputs true, you're out of display
cardMask = new Image(Root.assets.getTexture("card_mask"));
cardMask.y = Constants.STAGE_HEIGHT*0.40;
cardMask.x = Constants.STAGE_WIDTH *0.48; // mask creation unaltered
trace("it's add mask");
cardLight = new Image(Root.assets.getTexture("card_light_mask"));
cardLight.y = Constants.STAGE_HEIGHT*0.46;
cardLight.x = Constants.STAGE_WIDTH *0.48;
cardLight.mask=cardMask; // this is right
maskedDisplayObject = new PixelMaskDisplayObject(-1,false);
// maskedDisplayObject.addChild(cardLight); this is moved to main part of display list
maskedDisplayObject.x=cardLight.x;
maskedDisplayObject.y=cardLight.y;
// maskedDisplayObject.mask=cardMask; NO masking of this, you're only masking cardLight
cardLight.blendMode = BlendMode.SCREEN; // display mode is also changed
addChild(maskedDisplayObject);
addChild(cardLight);