您需要将PdfAction
附加到该字段的“鼠标移动”附加动作字典。
要添加一个动作到现有的字段比从头开始难,但仍然很有可能。
(Appologies,但我不知道vb.net可言,你必须从Java翻译)
// Create your action.
// There are quite a few static functions in PdfAction to choose from.
PdfAction buttonAction = PdfAction.javaScript(writer, scriptStr);
AcroFields.Item buttonItem = myAcroFields.getFieldItem(buttonFldName);
// "AA" stands for "additional actions"
PdfDictionary aaDict = buttomItem.getMerged(0).getAsDict(PdfName.AA);
if (aaDict == null) {
aaDict = new PdfDictionary();
} else { // this button already has an AA dictionary.
// if there's an existing up action, preserve it, but run ours first.
PdfDictionary upAction = aaDict.getAsDict(PdfName.U);
if (upAction != null) {
PdfIndirectReference ref = aaDict.getAsIndirect(PdfName.U);
if (ref != null) {
buttonAction.put(PdfName.NEXT, ref);
} else {
buttonAction.put(PdfName.NEXT, upAction);
}
}
}
aaDict.put(PdfName.U, buttonAction);
int writeFlags = AcroFields.Item.WRITE_WIDGET | AcroFields.Item.WRITE_MERGED;
buttomItem.writeToAll(PdfName.AA, aaDict, writeFlags);
你的具体情况,你也许可以简单:
PdfDictionary aaDict = new PdfDictionary();
aaDict.put(PdfName.U, buttonAction);
item.getWidget(0).put(PdfName.AA, aaDict);
这将消除任何现有的操作。这可能对你很好,它可能是非常糟糕的。
+1不错,我不认为这是可能的。 – 2011-04-27 21:06:42