Mercurial > projects > dwt-linux
diff dwt/custom/TableTreeEditor.d @ 102:12e3e0e477cd
package custom, module and imports ok
author | Frank Benoit <benoit@tionex.de> |
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date | Fri, 18 Jan 2008 11:45:54 +0100 |
parents | |
children | 0179b2e17eb2 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/dwt/custom/TableTreeEditor.d Fri Jan 18 11:45:54 2008 +0100 @@ -0,0 +1,271 @@ +/******************************************************************************* + * Copyright (c) 2000, 2007 IBM Corporation and others. + * All rights reserved. This program and the accompanying materials + * are made available under the terms of the Eclipse Public License v1.0 + * which accompanies this distribution, and is available at + * http://www.eclipse.org/legal/epl-v10.html + * + * Contributors: + * IBM Corporation - initial API and implementation + *******************************************************************************/ +module dwt.custom.TableTreeEditor; + + + +import dwt.DWT; +import dwt.events.ControlEvent; +import dwt.events.ControlListener; +import dwt.events.TreeEvent; +import dwt.events.TreeListener; +import dwt.graphics.Rectangle; +import dwt.widgets.Control; +import dwt.widgets.Table; +import dwt.widgets.TableColumn; +import dwt.custom.ControlEditor; +import dwt.custom.TableTree; +import dwt.custom.TableTreeItem; + + + +/** +* +* A TableTreeEditor is a manager for a Control that appears above a cell in a TableTree +* and tracks with the moving and resizing of that cell. It can be used to display a +* text widget above a cell in a TableTree so that the user can edit the contents of +* that cell. It can also be used to display a button that can launch a dialog for +* modifying the contents of the associated cell. +* +* <p> Here is an example of using a TableTreeEditor: +* <code><pre> +* final TableTree tableTree = new TableTree(shell, DWT.FULL_SELECTION | DWT.HIDE_SELECTION); +* final Table table = tableTree.getTable(); +* TableColumn column1 = new TableColumn(table, DWT.NONE); +* TableColumn column2 = new TableColumn(table, DWT.NONE); +* for (int i = 0; i < 10; i++) { +* TableTreeItem item = new TableTreeItem(tableTree, DWT.NONE); +* item.setText(0, "item " + i); +* item.setText(1, "edit this value"); +* for (int j = 0; j < 3; j++) { +* TableTreeItem subitem = new TableTreeItem(item, DWT.NONE); +* subitem.setText(0, "subitem " + i + " " + j); +* subitem.setText(1, "edit this value"); +* } +* } +* column1.setWidth(100); +* column2.pack(); +* +* final TableTreeEditor editor = new TableTreeEditor(tableTree); +* //The editor must have the same size as the cell and must +* //not be any smaller than 50 pixels. +* editor.horizontalAlignment = DWT.LEFT; +* editor.grabHorizontal = true; +* editor.minimumWidth = 50; +* // editing the second column +* final int EDITABLECOLUMN = 1; +* +* tableTree.addSelectionListener(new SelectionAdapter() { +* public void widgetSelected(SelectionEvent e) { +* // Clean up any previous editor control +* Control oldEditor = editor.getEditor(); +* if (oldEditor !is null) oldEditor.dispose(); +* +* // Identify the selected row +* TableTreeItem item = (TableTreeItem)e.item; +* if (item is null) return; +* +* // The control that will be the editor must be a child of the Table +* Text newEditor = new Text(table, DWT.NONE); +* newEditor.setText(item.getText(EDITABLECOLUMN)); +* newEditor.addModifyListener(new ModifyListener() { +* public void modifyText(ModifyEvent e) { +* Text text = (Text)editor.getEditor(); +* editor.getItem().setText(EDITABLECOLUMN, text.getText()); +* } +* }); +* newEditor.selectAll(); +* newEditor.setFocus(); +* editor.setEditor(newEditor, item, EDITABLECOLUMN); +* } +* }); +* </pre></code> +* +* @deprecated As of 3.1 use TreeEditor with Tree, TreeItem and TreeColumn +*/ +public class TableTreeEditor : ControlEditor { + + TableTree tableTree; + TableTreeItem item; + int column = -1; + ControlListener columnListener; + TreeListener treeListener; +/** +* Creates a TableTreeEditor for the specified TableTree. +* +* @param tableTree the TableTree Control above which this editor will be displayed +* +*/ +public this (TableTree tableTree) { + super(tableTree.getTable()); + this.tableTree = tableTree; + + treeListener = new class() TreeListener { + final Runnable runnable = new class() Runnable { + public void run() { + if (editor is null || editor.isDisposed()) return; + if (this.outer.tableTree.isDisposed()) return; + layout(); + editor.setVisible(true); + } + }; + public void treeCollapsed(TreeEvent e) { + if (editor is null || editor.isDisposed ()) return; + editor.setVisible(false); + e.display.asyncExec(runnable); + } + public void treeExpanded(TreeEvent e) { + if (editor is null || editor.isDisposed ()) return; + editor.setVisible(false); + e.display.asyncExec(runnable); + } + }; + tableTree.addTreeListener(treeListener); + + columnListener = new class() ControlListener { + public void controlMoved(ControlEvent e){ + layout (); + } + public void controlResized(ControlEvent e){ + layout (); + } + }; + + // To be consistent with older versions of DWT, grabVertical defaults to true + grabVertical = true; +} +Rectangle computeBounds () { + if (item is null || column is -1 || item.isDisposed() || item.tableItem is null) return new Rectangle(0, 0, 0, 0); + Rectangle cell = item.getBounds(column); + Rectangle area = tableTree.getClientArea(); + if (cell.x < area.x + area.width) { + if (cell.x + cell.width > area.x + area.width) { + cell.width = area.x + area.width - cell.x; + } + } + Rectangle editorRect = new Rectangle(cell.x, cell.y, minimumWidth, minimumHeight); + + if (grabHorizontal) { + editorRect.width = Math.max(cell.width, minimumWidth); + } + + if (grabVertical) { + editorRect.height = Math.max(cell.height, minimumHeight); + } + + if (horizontalAlignment is DWT.RIGHT) { + editorRect.x += cell.width - editorRect.width; + } else if (horizontalAlignment is DWT.LEFT) { + // do nothing - cell.x is the right answer + } else { // default is CENTER + editorRect.x += (cell.width - editorRect.width)/2; + } + + if (verticalAlignment is DWT.BOTTOM) { + editorRect.y += cell.height - editorRect.height; + } else if (verticalAlignment is DWT.TOP) { + // do nothing - cell.y is the right answer + } else { // default is CENTER + editorRect.y += (cell.height - editorRect.height)/2; + } + return editorRect; +} +/** + * Removes all associations between the TableTreeEditor and the cell in the table tree. The + * TableTree and the editor Control are <b>not</b> disposed. + */ +public void dispose () { + if (tableTree !is null && !tableTree.isDisposed()) { + Table table = tableTree.getTable(); + if (table !is null && !table.isDisposed()) { + if (this.column > -1 && this.column < table.getColumnCount()){ + TableColumn tableColumn = table.getColumn(this.column); + tableColumn.removeControlListener(columnListener); + } + } + if (treeListener !is null) tableTree.removeTreeListener(treeListener); + } + treeListener = null; + columnListener = null; + tableTree = null; + item = null; + column = -1; + super.dispose(); +} +/** +* Returns the zero based index of the column of the cell being tracked by this editor. +* +* @return the zero based index of the column of the cell being tracked by this editor +*/ +public int getColumn () { + return column; +} +/** +* Returns the TableTreeItem for the row of the cell being tracked by this editor. +* +* @return the TableTreeItem for the row of the cell being tracked by this editor +*/ +public TableTreeItem getItem () { + return item; +} +public void setColumn(int column) { + Table table = tableTree.getTable(); + int columnCount = table.getColumnCount(); + // Separately handle the case where the table has no TableColumns. + // In this situation, there is a single default column. + if (columnCount is 0) { + this.column = (column is 0) ? 0 : -1; + layout(); + return; + } + if (this.column > -1 && this.column < columnCount){ + TableColumn tableColumn = table.getColumn(this.column); + tableColumn.removeControlListener(columnListener); + this.column = -1; + } + + if (column < 0 || column >= table.getColumnCount()) return; + + this.column = column; + TableColumn tableColumn = table.getColumn(this.column); + tableColumn.addControlListener(columnListener); + layout(); +} +public void setItem (TableTreeItem item) { + this.item = item; + layout(); +} + +/** +* Specify the Control that is to be displayed and the cell in the table that it is to be positioned above. +* +* <p>Note: The Control provided as the editor <b>must</b> be created with its parent being the Table control +* specified in the TableEditor constructor. +* +* @param editor the Control that is displayed above the cell being edited +* @param item the TableItem for the row of the cell being tracked by this editor +* @param column the zero based index of the column of the cell being tracked by this editor +*/ +public void setEditor (Control editor, TableTreeItem item, int column) { + setItem(item); + setColumn(column); + setEditor(editor); +} +public void layout () { + if (tableTree is null || tableTree.isDisposed()) return; + if (item is null || item.isDisposed()) return; + Table table = tableTree.getTable(); + int columnCount = table.getColumnCount(); + if (columnCount is 0 && column !is 0) return; + if (columnCount > 0 && (column < 0 || column >= columnCount)) return; + super.layout(); +} +}