原創|使用教程|編輯:龔雪|2014-04-02 09:48:42.000|閱讀 1334 次
概述:FlexGantt甘特圖控件實現拖動多個時間表對象的辦法,及源碼。
# 界面/圖表報表/文檔/IDE等千款熱門軟控件火熱銷售中 >>
項目管理軟件越來越強大,在甘特圖設計中,同時展開多個跨行時間表對象也逐漸成常態化趨勢。FlexGantt控件通過使用攔截命令實現此功能。
攔截器方法停止使用單一的常規命令,使用幾個常規命令組合成復合命令取代它。 每個命令設置時間跨度為一個基于對象的時間表,實現拖動時間表對象。 前提是構造復合命令攔截器檢索列表中的時間表對象,并且這個對象來至選擇模型對象層。
源碼如下:
setCommandInterceptor(DefaultChangeTimespanCommand.class, new ICommandInterceptor() {
public boolean intercept(GanttChart gc, com.dlsc.flexgantt.command.ICommand cmd) {
DefaultChangeTimelineObjectTimespanCommand command =
(DefaultChangeTimelineObjectTimespanCommand) cmd;
TimelineObjectPath objectPath = new TimelineObjectPath(command.getNode().getPath(),
command.getTimelineObject(),
command.getLayer());
LayerContainer lc = gc.getLayerContainer();
/*
* Just an example on how to look up the layer. This is application-specific.
*/
Layer layer = MyModel.LAYER1;
ITimelineObjectSelectionModel selectionModel = lc.getSelectionModel(planLayer);
Iterator iter = selectionModel.getSelection();
List list = new ArrayList();
while (iter.hasNext()) {
TimelineObjectPath path = iter.next();
list.add(path);
}
if (list.size() > 1) {
int result = JOptionPane.showConfirmDialog(gc,
"Move multiple?",
"Move",
JOptionPane.YES_NO_CANCEL_OPTION);
switch (result) {
case JOptionPane.CANCEL_OPTION :
return false;
case JOptionPane.YES_OPTION :
replanSelection(
list,
objectPath,
operationCommand.getOldTimeSpan(),
operationCommand.getNewTimeSpan());
return false;
case JOptionPane.NO_OPTION :
return true;
}
}
return true;
}
private void replanSelection(List list, TimelineObjectPath originalPath,
ITimeSpan oldSpan, ITimeSpan newSpan) {
AbstractCompoundCommand comp = new AbstractCompoundCommand("Multi Replan") {};
long delta = oldSpan.getStartTime() - newSpan.getStartTime();
for (TimelineObjectPath path : list) {
ITimeSpan pathSpan = getModel().getTimeSpan(path.getTimelineObject());
ITimeSpan span = new TimeSpan(pathSpan.getStartTime() - delta,
pathSpan.getEndTime() - delta);
comp.addCommand(new DefaultChangeTimelineObjectTimespanCommand(
(DefaultGanttChartNode) path.getNode(),
path.getLayer(),
(ITimelineObject) path.getTimelineObject(),
(DefaultGanttChartModel) getModel(),
span,
DnDConstants.ACTION_MOVE));
}
getCommandStack().execute(comp,
new GanttChartProgressMonitor(myGanttChart));
};
});
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