GWT Image button - gwt

Question

I am creating a Image button from PNG icons, I need to make a feel of button (but not push button effect) just a when user clicks the image a dotted square (like a selection) will appear so to have the effect that the button is clicked. Any ideas?

Answer 1

Something like this in GWT:
Hyperlink link = new Hyperlink();
Image image = new Image(imageUrl);
...
link.getElement().appendChild(image.getElement());
link.setStyleName("imgBtnLink");
Add/set CSS style:
.imgBtnLink:active {
border-style:dashed;
}
Old JSFiddle example: http://jsfiddle.net/Wsaf5/

Answer 2

ToggleButton with CSS-styling is suitable.
ToggleButton button = new ToggleButton();
button.setStyleName("toggle-button");
...
CSS:
.toggle-button {
outline: none;
border: none;
margin: 3px; /* border size */
background: transparent url(../img/toggle-button.jpg);
}
.toggle-button-down, .toogle-button-down-hovering {
margin: 0;
border: 3px #469 dashed; /* margin size */
}

Answer 3

You can create your own Widget, i have this one
public class ImageButton extends Button {
public ImageButton() {
super();
}
public void setImgSrc(String imgSrc) {
Image img = new Image(imgSrc);
String definedStyles = img.getElement().getAttribute("style");
img.getElement().setAttribute("style",definedStyles);
img.getElement().getStyle().setVerticalAlign(VerticalAlign.MIDDLE);
DOM.insertBefore(getElement(), img.getElement(), DOM.getFirstChild(getElement()));
}
#Override
public void setText(String text) {
Element span = DOM.createElement("span");
span.setInnerText(text);
span.getStyle().setPaddingLeft(5, Unit.PX);
span.getStyle().setPaddingRight(3, Unit.PX);
span.getStyle().setVerticalAlign(VerticalAlign.MIDDLE);
span.getStyle().setColor("black");
span.setAttribute("class", "arial12R6D6D6D");
DOM.insertChild(getElement(), span, 0);
}
}

Answer 4

Could you add a stylesheet to the element in a ClickEvent handler? (addStyleDependentName).
Or, maybe PushButton could be useful?

Answer 5

I created a simple custom widget class that uses CSS and Events to display custom buttons:
Activity:
view.getContent().add(new ImageButton(resource.comment(), resource.search(), resource.chechCircle(), new ClickCallback() {
public void onClick() {
Window.alert("Clicked!");
}
}));
I use a UiBinder/Composite to control the layout and css and events. The "ClickCallback" is just a custom interface with one onClick method
the UiBinder files are here:
http://www.acrinta.com/ImageButton.zip
The Css shows a border on hover and the MouseOverMouseOut can swap images same with onClick where it changes the image for a split second. may give some ideas