请问是否可以使用鼠标滚轮来滚动 ScrolledComposite
?默认情况下无法实现。
请问是否可以使用鼠标滚轮来滚动 ScrolledComposite
?默认情况下无法实现。
在Google搜索后,我找到了一个简单的解决方案,
scrolledComposite.addListener(SWT.Activate, new Listener() {
public void handleEvent(Event e) {
scrolledComposite.setFocus();
}
});
显然,为您的复合控件创建鼠标滚轮监听器是必要的。您可以使用以下代码作为基础:
scrolledComposite = new ScrolledComposite(parent, SWT.H_SCROLL | SWT.V_SCROLL);
GridData scrollGridData = new GridData(SWT.FILL, SWT.FILL, true, true);
scrolledComposite.setLayoutData(scrollGridData);
layout = new GridLayout();
scrolledComposite.setLayout(layout);
compositeWrapper = new Composite(scrolledComposite);
compositeWrapper.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
compositeWrapper.setLayout(layout);
scrolledComposite.setExpandHorizontal(true);
scrolledComposite.setExpandVertical(true);
scrolledComposite.addListener(SWT.MouseWheel, new Listener() {
public void handleEvent(Event event) {
int wheelCount = event.count;
wheelCount = (int) Math.ceil(wheelCount / 3.0f);
while (wheelCount < 0) {
scrolledComposite.getVerticalBar().setIncrement(4);
wheelCount++;
}
while (wheelCount > 0) {
scrolledComposite.getVerticalBar().setIncrement(-4);
wheelCount--;
}
}
});
scrolledComposite.addListener(SWT.MouseWheel, new Listener() {
public void handleEvent(Event event) {
scrolledComposite.getVerticalBar().setIncrement(e.count*3);
}
});