private void go() {
target.clear();
switch (demoList.getSelectedIndex()) {
case 0:
demoButtonsAndBody();
break;
case 1:
demoSidebarAndMargin();
break;
case 2:
demoBorder();
break;
}
target.layout();
}
private void demoBorder() {
target.setLayout(new RowLayout());
LayoutPanel inner = new LayoutPanel(false); // row
inner.add(new Thing("West"), 0.2f);
inner.add(new Thing("Center"));
inner.add(new Thing("East"), 0.2f);
target.add(new Thing("North"), 0.2f);
target.add(inner, LayoutConstraints.HIDDEN);
target.add(new Thing("South"), 0.2f);
}
public RowLayoutPortlet() {
LayoutPanel panel = new LayoutPanel();
initWidget(panel);
final CheckBox column = new CheckBox("Column");
column.addValueChangeHandler(
new ValueChangeHandler<Boolean>() {
public void onValueChange(ValueChangeEvent<Boolean> event) {
getTargetLayout().setColumn(column.getValue());
target.layout();
}
});
final TextBox spacing = new TextBox();
spacing.setVisibleLength(4);
spacing.addChangeHandler(
new ChangeHandler() {
public void onChange(ChangeEvent event) {
try {
getTargetLayout().setSpacing(Integer.parseInt(spacing.getText()));
} catch (NumberFormatException e) {
// ignore
}
target.layout();
}
});
final Label bounds = new Label();
target.addLayoutHandler(
new LayoutHandler() {
public void onLayoutUpdated(LayoutEvent layoutEvent) {
bounds.setText(LDOM.getBounds(target).toString());
column.setValue(getTargetLayout().isColumn());
spacing.setText(Integer.toString(getTargetLayout().getSpacing()));
}
});
demoList.addItem("Buttons & Body");
demoList.addItem("Sidebar & Margin");
demoList.addItem("Border Layout");
demoList.setSelectedIndex(0);
Button add =
new CssButton(
"Add Widget",
new ClickHandler() {
public void onClick(ClickEvent event) {
target.add(new Thing("Widget-" + (target.getWidgetCount() + 1)));
target.layout();
}
},
"Add a new widget to the layout");
final Button go =
new CssButton(
"Go",
new ClickHandler() {
public void onClick(ClickEvent event) {
go();
}
},
"Reset the layout to the selected state");
demoList.addChangeHandler(
new ChangeHandler() {
public void onChange(ChangeEvent event) {
go.click();
}
});
FormBuilder b = new FormBuilder();
b.add(add)
.label("Spacing")
.field(spacing)
.field(column)
.add("")
.field(bounds)
.wrap()
.width("100%")
.add(demoList)
.add(go)
.endRow();
panel.add(b.getForm(), 22);
panel.add(target, LayoutConstraints.HIDDEN);
go();
}
private void demoSidebarAndMargin() {
target.setLayout(new RowLayout(false));
target.add(new Thing("Sidebar"), 0.2f);
target.add(new Thing("Body"));
target.add(new Thing("Margin"), 50);
}
private void demoButtonsAndBody() {
target.setLayout(new RowLayout());
target.add(new Thing("Buttons"), 50);
target.add(new Thing("Body"));
}
private RowLayout getTargetLayout() {
return (RowLayout) target.getLayout();
}