I'm following a beginner's tutorial at http://www.tutorialspoint.com/gwt/gwt_style_with_css.htm.
The code for the HelloWorld.html file is:
<html>
<head>
<title>Hello World</title>
<link rel="stylesheet" href="HelloWorld.css"/>
<script language="javascript" src="helloworld/helloworld.nocache.js">
</script>
</head>
<body>
<div id="mytext"><h1>Hello, World!</h1></div>
<div id="gwtGreenButton"></div>
<div id="gwtRedButton"></div>
</body>
</html>
In the HelloWorld.java (extending EntryPoint), I have:
RootPanel.get("gwtGreenButton").add(Btn1);
RootPanel.get("gwtRedButton").add(Btn2);
The 2 lines: RootPanel.get() always result in null. I don't know what happen, what to check? (too bad the site doesn't have a comment/discussion section)
Thanks.
Docs says
RootPanel.get(java.lang.String id)
Gets the root panel associated with a given browser element.
DOM.getElementById(java.lang.String)
Gets the element associated with the given unique id within the entire document.
Try with
com.google.gwt.user.client.DOM.getElementById("gwtGreenButton");
com.google.gwt.user.client.DOM.getElementById("gwtRedButton");
Related
i am following SAP UI5 course from OpenSAP, and in week 1 unit 2, when I do, what is given in exercise my code doesn't work.
Any help please?
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta charset="utf-8">
<script
id="sap-ui-bootstrap"
src="https://sapui5.hana.ondemand.com/resources/sap-ui-core.js"
data-sap-ui-theme="sap_bluecrystal"
data-sap-ui-libs="sap.m"
data-sap-ui-compatVersion="edge"
data-sap-ui-preload="async"
data-sap-ui-resourceroots='{"opensap.MyApp": "./"}'
>
</script>
<script src="https://sap.github.io/openSAP-ui5-course/Validator.js">
</script>
<script>
sap.ui.getCore().attachInit(function () {
sap.ui.xmlview({viewName: "opensap.MyApp.view.App"}).placeAt("content");
});
</script>
</head>
<body class="sapUiBody" id="content">
</body>
</html>
And this is my view which is present in view folder
<mvc:View
displayBlock="true"
xmlns:mvc="sap.ui.core.mvc">
xmlns="sap.m"
<Carousel>
<pages>
<Image src="https://upload.wikimedia.org/wikipedia/commons/9/9f/GEO_Globe.jpg"/>
<Image src="https://upload.wikimedia.org/wikipedia/commons/9/9f/GEO_Globe.jpg"/>
</pages>
</Carousel>
</mvc:View>
Just for the record why "../" worked out: It depends on how your project folder structure looks like. With '{ "opensap.myapp": "../" }', you're registering a module path to your app by saying "Whenever I'm using "opensap.myapp." as a prefix, start to search for the resource from the path ../ relative to where my current document is located (in our case, index.html)." thus resourceRoot.
Best practice of how to structure your project folder can be found here: https://openui5.hana.ondemand.com/#docs/guide/003f755d46d34dd1bbce9ffe08c8d46a.html
Here is another answer which explains the issue further: https://stackoverflow.com/a/35722435/5846045
PS: You might encounter some cosmetic bugs if you keep using the theme sap_bluecrystal due to its deprecation (since version 1.38). Better use sap_belize or sap_belize_plus, if your app is running on a newer version.
To anybody who is suffering similar to me.
Instead of using
data-sap-ui-resourceroots='{
"opensap.myapp": "./"
}'>
Use data-sap-ui-resourceroots='{
"opensap.myapp": "../"
}'>
After struggling a whole hour, I tried this and it worked. Whatever syntax given in docx file in the exercise is wrong. Or either that some feature is updated.
I am trying to use the sap.m.ActionSelect within my application (as I like the combination of selection and action buttons). However, even within this simple test, I cannot get the drop list to show anything other than the first item. I am sure I am doing something completely dumb, but this one has me beaten. If anyone can spot the deliberate mistake I would be grateful!
<!doctype html>
<html>
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<title>ActionSelect</title>
<script id="sap-ui-bootstrap" src="../openui5/sap-ui-core.js" data-sap-ui-theme="sap_bluecrystal" data-sap-ui-libs="sap.ui.commons"
data-sap-ui-libs="sap.ui.unified" data-sap-ui-libs="sap.m"
data-sap-ui-resourceroots='{
"sparqlish":"../",
"sparqlish":"../sparqlish",
"Components":"../",
"Components":"../Components"
}'
data-sap-ui-xx-bindingSyntax="complex" type="text/javascript"></script>
<script type="text/javascript">
jQuery.sap.require("sap.m.ActionSelect");
jQuery.sap.require("sap.m.Button");
this.oServiceSelect = new sap.m.ActionSelect();
var oItem = new sap.ui.core.ListItem("Country1");
oItem.setText("Canada");
this.oServiceSelect.addItem(oItem);
oItem = new sap.ui.core.ListItem("Country2");
oItem.setText("Deutschland");
this.oServiceSelect.addItem(oItem);
oItem = new sap.ui.core.ListItem("Country3");
oItem.setText("England");
this.oServiceSelect.addItem(oItem);
oItem = new sap.ui.core.ListItem("Country4");
oItem.setText("Россия");
this.oServiceSelect.addItem(oItem);
this.oServiceSelect.setEnabled(true);
this.oServiceSelect.placeAt("serviceMenu");
this.oServiceSelect.addButton(new sap.m.Button({
text : "Action 1",
press : function(){alert("Action 1")}
}));
this.oServiceSelect.addButton(new sap.m.Button({
text : "Action 2",
press : function(){alert("Action 2")}
}));
</script>
</head>
<body>
<div id="serviceMenu"></div>
</body>
</html>
You have several issues in the code. First, you are loading the libs at bootstrap with three different attributes. This is wrong! Instead simply use one attribute and list the libs you want separated by comma.
Another issue in the code is that you are loading both sap.ui.commons and sap.m. As a rule of thumb you should never ever mix sap.ui.commons and sap.m!!! That's very important.
In your case you could and definitely should even completely remove sap.ui.commons because as far as I can see it from your code you are not using it anyway.
It appears that the order in which one declares the data-sap-ui-libs is important. The original order in the example above was:
data-sap-ui-libs="sap.ui.commons"
data-sap-ui-libs="sap.ui.unified"
data-sap-ui-libs="sap.m"
However if I reorder these to the following, with data-sap-ui-libs="sap.m" everything works well
data-sap-ui-libs="sap.m"
data-sap-ui-libs="sap.ui.commons"
data-sap-ui-libs="sap.ui.unified"
I am new playwork. I have been going through the tutorials and samples provided the playframework.
I could successfully render helloworld application provided by playframework samples.
I have few doubts regarding the rendering part of main.scala.html.#
This is the default program which I got from samples/helloworld
#(title: String)(content: Html)
<!DOCTYPE html>
<html>
<head>
<title>#title</title>
<link rel="stylesheet" media="screen" href="#routes.Assets.at("stylesheets/main.css")">
<link rel="shortcut icon" type="image/png" href="#routes.Assets.at("images/favicon.png")">
<script src="#routes.Assets.at("javascripts/jquery-1.6.4.min.js")" type="text/javascript"></script>
</head>
<body>
<header>
#title
</header>
<section>
#content
</section>
</body>
</html>
Here when I commented out the #content under section tag , I am not able to see the the fields.
Now my question is, where is #content is mapped to the Form field?
I created another structure for my layout and added the #content to the content section. but it does not fit into that
so now my question is #content where is that defined that it is div container and has got some height and weight and all?
I could not understand. Please help me.
Pleae find my customized code below
#(title: String)(content: Html)
<!DOCTYPE html>
<html>
<head>
<title>#title</title>
<link rel="stylesheet" media="screen" href="#routes.Assets.at("stylesheets/main.css")">
<link rel="shortcut icon" type="image/png" href="#routes.Assets.at("images/favicon.png")">
<script src="#routes.Assets.at("javascripts/jquery-1.7.1.min.js")" type="text/javascript"></script>
</head>
<body>
<div id="container" style="width:500px">
<div id="header" style="background-color:#FFA500;">
<h1 style="margin-bottom:0;">Main Title of Web Page</h1></div>
<div id="menu" style="background-color:#FFD700;height:200px;width:100px;float:left;">
<b>Menu</b><br>
HTML<br>
CSS<br>
JavaScript</div>
<div id="content" style="background-color:#EEEEEE;height:200px;width:400px;float:left;">
#content</div>
<div id="footer" style="background-color:#FFA500;clear:both;text-align:center;">
Copyright © W3Schools.com</div>
</body>
</html>
Introduction
From Template parameters in the Play Template documentation, the meaning of the first line is described. Here, we see that two parameter groups are required.
The two parameter groups are:
a String parameter containing the title
a Html parameter containing some HTML content
Usage
To use this template, two parameter groups have to be supplied. In the context of the helloworld application, it is called from app/views/index.scala.html like this:
#main(title = "The 'helloworld' application") {
<h1>Configure your 'Hello world':</h1>
... more HTML elided
}
This pattern is described in http://www.playframework.com/documentation/2.2.x/ScalaTemplateUseCases, where HTML is injected into a template.
main.scala.html contains the template (content contains the HTML to be injected).
index.scala.html contains an example of injection into this template.
Note that calling #main(...) calls the template that is defined in main.scala.html.Similarly, calling #my_template(...) would call the template defined in my_template.scala.html.
In this case, the HTML for the form is defined inside index.scala.html.
Calling the Template
Finally, the root template is called from a controller. For the helloworld application, the template defined in index.scala.html is invoked by the code
def index = Action {
Ok(html.index(helloForm))
}
This is where the form object is injected into the template.
I don't understand how to use XUI tween. On the xui website, they give the following example code:
x$('#box').tween([{left:'100px', backgroundColor:'green', duration:.2 }, { right:'100px' }]);
What is that supposed to do? I created a <div id="box"></div>, ran the line of js code above, but nothing happened. Here's my complete code:
<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<script type="text/javascript" src="xui.min.js"></script>
<script type="text/javascript">
x$('#box').tween([{left:'100px', backgroundColor:'green', duration:.2 }, { right:'100px' }]);
</script>
</head>
<body>
<div id="box"></div>
</body>
</html>
Nothing happens...
So, XUI's tween seems to be a work in process. In fact, in the master branch code on GitHub you find:
// queued animations
/* wtf is this?
if (props instanceof Array) {
// animate each passing the next to the last callback to enqueue
props.forEach(function(a){
});
}
*/
So, in short, the array-based tween properties appear busted at the moment. In addition, XUI's tween seems to be a little flakey when dealing with properties that are not currently set on the DOM element. (For example, setting the background-color on a transparent element turns it black...rather than the intended color.)
That said, the single tween and callback work well on previously set properties. So take a look at the following (and excuse the inline css):
<html>
<head>
<script type="text/javascript" src="http://xuijs.com/downloads/xui-2.3.2.min.js"></script>
<script type="text/javascript">
x$.ready(function(){
setTimeout(function(){
x$('#box').tween({'left':'100px', 'background-color':'#339900', duration:2000}, function(){
x$('#box').tween({'left':'500px', duration:2000});
});
}, 500);
});
</script>
</head>
<body style="position:relative;">
<div id="box" style="position:absolute;top:50px;left:500px;width:100px;height:100px;background-color:#fff;border:1px solid #000;">the box</div>
</body>
</html>
Because #box now has a css background-property and left position explicitly set, it is relatively easy to produce an effect similar to the one desired.
One-half second after the page loads, #box should spend 2 seconds moving from left:500px to left:100px while turning the background color from white to green. Then, using the callback, #box moves back to its original position at left:500px--taking another 2 seconds to get back.
Obviously, this does not answer your exact question but for those (like me) who stumble upon this, it provides a workaround for the time being.
In the main kid template file, I want it to have only div tags, each of which do only call a rendered kid file and paste content inside it. (like "include" function in php) but I don't know how to do this. Does someone have any ideas about it?
If you swap to genshi instead of the default kid you can do this with an include tag:
<xi:include href="menu.html" />
Swapping to genshi is fairly easy, I think its a matter of confuration only. The templates tags works otherwise the same. You should rename the extensions from .kid to .html though.
You can first define a "base_layout.kid" template:
<html xmlns:py="http://purl.org/kid/ns#">
<head>
<title>App Name - ${page_title}</title>
<link href="layout.css" type="text/css" rel="stylesheet" />
${page_specific_css()}
</head>
<body>
<h1>Now viewing: ${page_title} of App Name</h1>
<content>Default content</content>
<div class="footer">Page Footer Text</div>
</body>
</html>
Then replace the "content" tag in "page.kid" with whatever data you want:
<html py:layout="'base_layout.kid'"
xmlns:py="http://purl.org/kid/ns#">
<link py:def="page_specific_css()"
href="layout.css" type="text/css" rel="stylesheet" />
<div py:match="item.tag == 'content'">
<ul>
<li>Content Item 1</li>
<li>Content Item 2</li>
<li>Content Item 3</li>
</ul>
</div>
</html>
You can check whether you get the correct html in python shell (after removing all the identifiers used):
>>> import kid
>>> t = kid.Template("page.kid")
>>> print t.serialize()