gef connection 改变颜色

最新推荐文章于 2012-05-13 22:29:34 发布

原创最新推荐文章于 2012-05-13 22:29:34 发布 · 219 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#gef

RCP 专栏收录该内容

5 篇文章

订阅专栏

本文介绍了一种自定义的选择反馈策略实现方法，该策略通过修改连接的可见性和颜色来增强用户交互体验。当选择元素时，它会改变与之相关的连接的颜色以提供视觉反馈。

[list=1][list=1]
[*]installEditPolicy(EditPolicy.SELECTION_FEEDBACK_ROLE, [b]new[/b] SelectionEditPolicy());

[/list][/list]
[*][b]public[/b] [b]class[/b] SelectionEditPolicy [b]extends[/b] SelectionEditPolicy {

[*]

[*] [b]protected[/b] [b]void[/b] hideSelection() {

[*] BlockEditpart editpart = (BlockEditpart)getHost();

[*] setConnectionVisible(editpart.getSourceConnections(),[b]false[/b],[b]null[/b]);

[*] setConnectionVisible(editpart.getTargetConnections(),[b]false[/b],[b]null[/b]);

[*] }

[*]

[*] [b]protected[/b] [b]void[/b] showPrimarySelection() {

[*] BlockEditpart editpart = (BlockEditpart)getHost();

[*] editpart.refreshConnections();

[*] setConnectionVisible(editpart.getSourceConnections(),[b]true[/b],ColorConstants.red);

[*] setConnectionVisible(editpart.getTargetConnections(),[b]true[/b],ColorConstants.red);

[*] }

[*]

[*] [b]protected[/b] [b]void[/b] showSelection() {

[*] BlockEditpart editpart = (BlockEditpart)getHost();

[*] setConnectionVisible(editpart.getSourceConnections(),[b]true[/b],ColorConstants.green);

[*] setConnectionVisible(editpart.getTargetConnections(),[b]true[/b],ColorConstants.green);

[*] }

[*]

[*] [b]private[/b] [b]void[/b] setConnectionVisible(List> Connections, [b]boolean[/b] b, Color fg) {

[*] [b]for[/b](Object o : Connections) {

[*] [b]if[/b](o [b]instanceof[/b] ConnectionEditPart) {

[*] ConnectionEditPart cep = (ConnectionEditPart)o;

[*] cep.setVisible(b,fg);

[*] }

[*] }

[*] }

[*]}
[url]http://www.imilo.cn/[/url]