在其他列中使用Java SWT的工具提示？

本文介绍了在其他列中使用Java SWT的工具提示？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 我有一个4列的表。我尝试为第三列的所有单元格集成一个ToolTip。 使用我的代码，工具提示仅对第一列的单元格显示。

这是我的代码：

protected void checkAction（）throws Exception { System.out.println（Start Test）; // Erstellen einer neuen Shell final Shell shell = new Shell（）; shell.setSize（280,300）; shell.setText（Testtabelle）; // Erstellen einer neuen Tabelle final Table table = new Table（shell，SWT.MULTI | SWT.BORDER | SWT.FULL_SELECTION）; table.setLinesVisible（true）; table.setHeaderVisible（true）; // Einlesen derÜberschriftenund Vergabe der Namen String [] titles = {Element，Stage，Type，Generate-User，Change-User }; （int i = 0; i< titles.length; i ++）{ TableColumn column = new TableColumn（table，SWT.NONE）; column.setText（titles [i]）; } // Inhaltehinzufügen final int count = 4; （int i = 0; i< count; i ++）{ TableItem item = new TableItem（table，SWT.NONE）; item.setText（0，Test+ i）; item.setText（1，+（i + 1））; item.setText（2，Testtype）; item.setText（3，562910）; item.setText（4，423424）; } //禁用本地工具提示 table.setToolTipText（）; //实现一个假工具提示 final Listener labelListener = new Listener（）{ public void handleEvent（Event event）{ Label label = ）event.widget; Shell shell = label.getShell（）; switch（event.type）{ case SWT.MouseDown： Event e = new Event（）; e.item =（TableItem）label.getData（_TABLEITEM）; //假设表是单选，设置选择就好像 //鼠标下拉事件通过表 table.setSelection（new TableItem [] {（TableItem）e。项目}）; table.notifyListeners（SWT.Selection，e）; shell.dispose（）; table.setFocus（）; break; case SWT.MouseExit： shell.dispose（）; break; } } }; Listener tableListener = new Listener（）{ Shell tip = null; 标签label = null; public void handleEvent（Event event）{ switch（event.type）{ case SWT.Dispose： case SWT.KeyDown： case SWT.MouseMove： { if（tip == null）break; tip.dispose（）; tip = null; label = null; break; } case SWT.MouseHover：{ TableItem item = table.getItem（new Point（event.x，event.y））; if（item！= null）{ if（tip！= null&！tip.isDisposed（））tip.dispose（）; tip = new Shell（shell，SWT.ON_TOP | SWT.NO_FOCUS | SWT.TOOL）; FillLayout layout = new FillLayout（）; layout.marginWidth = 2; tip.setLayout（layout）; label = new Label（tip，SWT.NONE）; label.setData（_TABLEITEM，item）; if（item.getText（）。equals（Test 3））{ label.setText（Jonas Intfeld）; } else { label.setText（item.getText（））; } label.addListener（SWT.MouseExit，labelListener）; label.addListener（SWT.MouseDown，labelListener）; 点大小= tipputeSize（SWT.DEFAULT，SWT.DEFAULT）; Rectangle rect = item.getBounds（0）; 点pt = table.toDisplay（rect.x，rect.y）; tip.setBounds（pt.x，pt.y，size.x，size.y）; tip.setVisible（true）; } } } } }; table.addListener（SWT.Dispose，tableListener）; table.addListener（SWT.KeyDown，tableListener）; table.addListener（SWT.MouseMove，tableListener）; table.addListener（SWT.MouseHover，tableListener）; （int i = 0; i< titles.length; i ++）{ table.getColumn（i）.pack（）; // Tabelle und Shell Packen } table.setSize（tableputeSize（SWT.DEFAULT，200））; shell.pack（）; // Shellöffnen try {shell.open（）; } catch（SWTException e）{ System.out.println（Test：+ e）; shell.close（）; } }

有没有办法激活3.列的工具提示？ 当我移动到3.列中的单元格时，工具提示出现在1.列。

也许最好的选择是搜索列标题？

解决方案

您的问题是这一行：

Rectangle rect = item.getBounds（0）;

您正在要求第一列的边界。只需将索引更改为您希望您的工具提示出现的列，您就可以：

Rectangle rect = item。的getBounds（2）;

如果您需要从鼠标位置，请使用以下代码：

点点=新点（event.x，event.y）; int column = 0; （int i = 0; i< table.getColumnCount（）; i ++） { if（item.getBounds（i）.contains（point）） { column = i; break; } } Rectangle rect = item.getBounds（column）;

I have a table with 4 columns. I try to integrate a ToolTip for all cells of the third column. With my Code the ToolTip only appears for the cells of the first column.

This is my Code:

protected void checkAction() throws Exception { System.out.println("Start Test"); //Erstellen einer neuen Shell final Shell shell = new Shell(); shell.setSize(280, 300); shell.setText("Testtabelle"); //Erstellen einer neuen Tabelle final Table table = new Table(shell, SWT.MULTI | SWT.BORDER | SWT.FULL_SELECTION); table.setLinesVisible(true); table.setHeaderVisible(true); //Einlesen der Überschriften und Vergabe der Namen String[] titles = {"Element", "Stage", "Type", "Generate-User", "Change-User" }; for (int i = 0; i < titles.length; i++) { TableColumn column = new TableColumn(table, SWT.NONE); column.setText(titles[i]); } // Inhalte hinzufügen final int count = 4; for (int i = 0; i < count; i++) { TableItem item = new TableItem(table, SWT.NONE); item.setText(0, "Test "+i); item.setText(1, ""+(i+1)); item.setText(2, "Testtype"); item.setText(3, "562910"); item.setText(4, "423424"); } // Disable native tooltip table.setToolTipText (""); // Implement a "fake" tooltip final Listener labelListener = new Listener () { public void handleEvent (Event event) { Label label = (Label)event.widget; Shell shell = label.getShell (); switch (event.type) { case SWT.MouseDown: Event e = new Event (); e.item = (TableItem) label.getData ("_TABLEITEM"); // Assuming table is single select, set the selection as if // the mouse down event went through to the table table.setSelection (new TableItem [] {(TableItem) e.item}); table.notifyListeners (SWT.Selection, e); shell.dispose (); table.setFocus(); break; case SWT.MouseExit: shell.dispose (); break; } } }; Listener tableListener = new Listener () { Shell tip = null; Label label = null; public void handleEvent (Event event) { switch (event.type) { case SWT.Dispose: case SWT.KeyDown: case SWT.MouseMove: { if (tip == null) break; tip.dispose (); tip = null; label = null; break; } case SWT.MouseHover: { TableItem item = table.getItem (new Point (event.x, event.y)); if (item != null) { if (tip != null && !tip.isDisposed ()) tip.dispose (); tip = new Shell (shell, SWT.ON_TOP | SWT.NO_FOCUS | SWT.TOOL); FillLayout layout = new FillLayout (); layout.marginWidth = 2; tip.setLayout (layout); label = new Label (tip, SWT.NONE); label.setData ("_TABLEITEM", item); if (item.getText().equals("Test 3")){ label.setText ("Jonas Intfeld"); } else{ label.setText (item.getText ()); } label.addListener (SWT.MouseExit, labelListener); label.addListener (SWT.MouseDown, labelListener); Point size = tipputeSize (SWT.DEFAULT, SWT.DEFAULT); Rectangle rect = item.getBounds (0); Point pt = table.toDisplay (rect.x, rect.y); tip.setBounds (pt.x, pt.y, size.x, size.y); tip.setVisible (true); } } } } }; table.addListener (SWT.Dispose, tableListener); table.addListener (SWT.KeyDown, tableListener); table.addListener (SWT.MouseMove, tableListener); table.addListener (SWT.MouseHover, tableListener); // Tabelle und Shell Packen for (int i = 0; i < titles.length; i++) { table.getColumn(i).pack(); } table.setSize(tableputeSize(SWT.DEFAULT, 200)); shell.pack(); // Shell öffnen try { shell.open(); } catch (SWTException e) { System.out.println("Test: "+e); shell.close(); } }

Is there any way to activate the Tooltip for the 3. Column ? At the moment when I move over the cells in the 3. column the Tooltip appears for the 1. column.

Maybe the best option is to search the column by title?

解决方案

Your problem is this line:

Rectangle rect = item.getBounds(0);

You are asking for the bounds of the first column. Just change the index to the column where you want your tooltip to appear and you'll be fine:

Rectangle rect = item.getBounds(2);

If you need to get the column index from the mouse position, use this code:

Point point = new Point(event.x, event.y); int column = 0; for (int i = 0; i < table.getColumnCount(); i++) { if (item.getBounds(i).contains(point)) { column = i; break; } } Rectangle rect = item.getBounds(column);