Java 如何制作一个可编辑的SWT组合,允许用户只键入组合中的项目
我有一个SWTJava 如何制作一个可编辑的SWT组合,允许用户只键入组合中的项目,java,swt,jface,Java,Swt,Jface,我有一个SWTCombo,其中一些字符串列表被设置为Combo的项 组合应可编辑,以便: 当用户输入一个不存在的项目时,不允许它键入和 当用户输入现有项时,它应该根据键入的每个键进行提示 请告诉我您对如何实现这一目标的建议?我在这里找到了一个例子: 我稍微修改了它,以便在未找到匹配项时清除组合: private static String[] items = new String[] { "Monday", "Tuesday", "Wednesday", "Thursday", "Frid
Combo
,其中一些字符串列表被设置为Combo
的项
组合应可编辑,以便:
请告诉我您对如何实现这一目标的建议?我在这里找到了一个例子: 我稍微修改了它,以便在未找到匹配项时清除
组合:
private static String[] items = new String[] { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday" };
public static void main(String[] args)
{
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("StackOverflow");
shell.setLayout(new FillLayout());
Combo combo = new Combo(shell, SWT.BORDER);
for (int i = 0; i < items.length; i++)
{
combo.add(items[i]);
}
addAutoCompleteFeature(combo);
shell.pack();
shell.open();
while (!shell.isDisposed())
{
if (!display.readAndDispatch())
{
display.sleep();
}
}
display.dispose();
}
public static void addAutoCompleteFeature(Combo combo)
{
// Add a key listener
combo.addKeyListener(new KeyAdapter()
{
public void keyReleased(KeyEvent keyEvent)
{
Combo cmb = ((Combo) keyEvent.getSource());
setClosestMatch(cmb);
}
// Move the highlight back by one character for backspace
public void keyPressed(KeyEvent keyEvent)
{
if (keyEvent.keyCode == SWT.BS)
{
Combo cmb = ((Combo) keyEvent.getSource());
Point pt = cmb.getSelection();
cmb.setSelection(new Point(Math.max(0, pt.x - 1), pt.y));
}
}
private void setClosestMatch(Combo combo)
{
String str = combo.getText();
String[] cItems = combo.getItems();
// Find Item in Combo Items. If full match returns index
int index = -1;
for (int i = 0; i < cItems.length; i++)
{
if (cItems[i].toLowerCase().startsWith(str.toLowerCase()))
{
index = i;
break;
}
}
if (index != -1)
{
Point pt = combo.getSelection();
combo.select(index);
combo.setText(cItems[index]);
combo.setSelection(new Point(pt.x, cItems[index].length()));
}
else
{
combo.setText("");
}
}
});
}
private static String[]items=新字符串[]{“周一”、“周二”、“周三”、“周四”、“周五”、“周六”、“周日”};
公共静态void main(字符串[]args)
{
显示=新显示();
外壳=新外壳(显示);
shell.setText(“StackOverflow”);
setLayout(新的FillLayout());
组合组合=新组合(shell,SWT.BORDER);
对于(int i=0;i
我在这里找到了一个例子:
我稍微修改了它,以便在未找到匹配项时清除组合:
private static String[] items = new String[] { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday" };
public static void main(String[] args)
{
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("StackOverflow");
shell.setLayout(new FillLayout());
Combo combo = new Combo(shell, SWT.BORDER);
for (int i = 0; i < items.length; i++)
{
combo.add(items[i]);
}
addAutoCompleteFeature(combo);
shell.pack();
shell.open();
while (!shell.isDisposed())
{
if (!display.readAndDispatch())
{
display.sleep();
}
}
display.dispose();
}
public static void addAutoCompleteFeature(Combo combo)
{
// Add a key listener
combo.addKeyListener(new KeyAdapter()
{
public void keyReleased(KeyEvent keyEvent)
{
Combo cmb = ((Combo) keyEvent.getSource());
setClosestMatch(cmb);
}
// Move the highlight back by one character for backspace
public void keyPressed(KeyEvent keyEvent)
{
if (keyEvent.keyCode == SWT.BS)
{
Combo cmb = ((Combo) keyEvent.getSource());
Point pt = cmb.getSelection();
cmb.setSelection(new Point(Math.max(0, pt.x - 1), pt.y));
}
}
private void setClosestMatch(Combo combo)
{
String str = combo.getText();
String[] cItems = combo.getItems();
// Find Item in Combo Items. If full match returns index
int index = -1;
for (int i = 0; i < cItems.length; i++)
{
if (cItems[i].toLowerCase().startsWith(str.toLowerCase()))
{
index = i;
break;
}
}
if (index != -1)
{
Point pt = combo.getSelection();
combo.select(index);
combo.setText(cItems[index]);
combo.setSelection(new Point(pt.x, cItems[index].length()));
}
else
{
combo.setText("");
}
}
});
}
private static String[]items=新字符串[]{“周一”、“周二”、“周三”、“周四”、“周五”、“周六”、“周日”};
公共静态void main(字符串[]args)
{
显示=新显示();
外壳=新外壳(显示);
shell.setText(“StackOverflow”);
setLayout(新的FillLayout());
组合组合=新组合(shell,SWT.BORDER);
对于(int i=0;i