List of usage examples for org.eclipse.swt.widgets Tree getColumn
public TreeColumn getColumn(int index)
From source file:org.eclipse.swt.snippets.Snippet240.java
public static void main(String[] args) { final Display display = new Display(); Shell shell = new Shell(display); shell.setText("Text spans two columns in a TreeItem"); shell.setLayout(new FillLayout()); final Tree tree = new Tree(shell, SWT.MULTI | SWT.FULL_SELECTION); tree.setHeaderVisible(true);//from w w w. j av a2 s. c o m int columnCount = 4; for (int i = 0; i < columnCount; i++) { TreeColumn column = new TreeColumn(tree, SWT.NONE); column.setText("Column " + i); } int itemCount = 8; for (int i = 0; i < itemCount; i++) { TreeItem item = new TreeItem(tree, SWT.NONE); item.setText(0, "item " + i + " a"); item.setText(3, "item " + i + " d"); for (int j = 0; j < 3; j++) { TreeItem subItem = new TreeItem(item, SWT.NONE); subItem.setText(0, "subItem " + i + "-" + j + " a"); subItem.setText(3, "subItem " + i + "-" + j + " d"); } } /* * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly. * Therefore, it is critical for performance that these methods be * as efficient as possible. */ final String string = "text that spans two columns"; GC gc = new GC(tree); final Point extent = gc.stringExtent(string); gc.dispose(); final Color red = display.getSystemColor(SWT.COLOR_RED); Listener paintListener = event -> { switch (event.type) { case SWT.MeasureItem: { if (event.index == 1 || event.index == 2) { event.width = extent.x / 2; event.height = Math.max(event.height, extent.y + 2); } break; } case SWT.PaintItem: { if (event.index == 1 || event.index == 2) { int offset = 0; if (event.index == 2) { TreeColumn column1 = tree.getColumn(1); offset = column1.getWidth(); } event.gc.setForeground(red); int y = event.y + (event.height - extent.y) / 2; event.gc.drawString(string, event.x - offset, y, true); } break; } } }; tree.addListener(SWT.MeasureItem, paintListener); tree.addListener(SWT.PaintItem, paintListener); for (int i = 0; i < columnCount; i++) { tree.getColumn(i).pack(); } shell.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); }
From source file:TreeEventMeasurePaintErase.java
public static void main(String[] args) { Display display = new Display(); final Image image = display.getSystemImage(SWT.ICON_INFORMATION); Shell shell = new Shell(display); shell.setText("Images on the right side of the TreeItem"); shell.setLayout(new FillLayout()); Tree tree = new Tree(shell, SWT.MULTI | SWT.FULL_SELECTION); tree.setHeaderVisible(true);//w ww.j av a2s. co m tree.setLinesVisible(true); int columnCount = 4; for (int i = 0; i < columnCount; i++) { TreeColumn column = new TreeColumn(tree, SWT.NONE); column.setText("Column " + i); } int itemCount = 3; for (int i = 0; i < itemCount; i++) { TreeItem item1 = new TreeItem(tree, SWT.NONE); item1.setText("item " + i); for (int c = 1; c < columnCount; c++) { item1.setText(c, "item [" + i + "-" + c + "]"); } for (int j = 0; j < itemCount; j++) { TreeItem item2 = new TreeItem(item1, SWT.NONE); item2.setText("item [" + i + " " + j + "]"); for (int c = 1; c < columnCount; c++) { item2.setText(c, "item [" + i + " " + j + "-" + c + "]"); } for (int k = 0; k < itemCount; k++) { TreeItem item3 = new TreeItem(item2, SWT.NONE); item3.setText("item [" + i + " " + j + " " + k + "]"); for (int c = 1; c < columnCount; c++) { item3.setText(c, "item [" + i + " " + j + " " + k + "-" + c + "]"); } } } } /* * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly. * Therefore, it is critical for performance that these methods be as * efficient as possible. */ Listener paintListener = new Listener() { public void handleEvent(Event event) { switch (event.type) { case SWT.MeasureItem: { Rectangle rect = image.getBounds(); event.width += rect.width; event.height = Math.max(event.height, rect.height + 2); break; } case SWT.PaintItem: { int x = event.x + event.width; Rectangle rect = image.getBounds(); int offset = Math.max(0, (event.height - rect.height) / 2); event.gc.drawImage(image, x, event.y + offset); break; } } } }; tree.addListener(SWT.MeasureItem, paintListener); tree.addListener(SWT.PaintItem, paintListener); for (int i = 0; i < columnCount; i++) { tree.getColumn(i).pack(); } shell.setSize(500, 200); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } if (image != null) image.dispose(); display.dispose(); }
From source file:org.eclipse.swt.snippets.Snippet226.java
public static void main(String[] args) { final Display display = new Display(); Shell shell = new Shell(display); shell.setText("Custom gradient selection for Tree"); shell.setLayout(new FillLayout()); final Tree tree = new Tree(shell, SWT.MULTI | SWT.FULL_SELECTION); tree.setHeaderVisible(true);/*www. j a va 2 s.c om*/ tree.setLinesVisible(true); int columnCount = 4; for (int i = 0; i < columnCount; i++) { TreeColumn column = new TreeColumn(tree, SWT.NONE); column.setText("Column " + i); } int itemCount = 3; for (int i = 0; i < itemCount; i++) { TreeItem item1 = new TreeItem(tree, SWT.NONE); item1.setText("item " + i); for (int c = 1; c < columnCount; c++) { item1.setText(c, "item [" + i + "-" + c + "]"); } for (int j = 0; j < itemCount; j++) { TreeItem item2 = new TreeItem(item1, SWT.NONE); item2.setText("item [" + i + " " + j + "]"); for (int c = 1; c < columnCount; c++) { item2.setText(c, "item [" + i + " " + j + "-" + c + "]"); } for (int k = 0; k < itemCount; k++) { TreeItem item3 = new TreeItem(item2, SWT.NONE); item3.setText("item [" + i + " " + j + " " + k + "]"); for (int c = 1; c < columnCount; c++) { item3.setText(c, "item [" + i + " " + j + " " + k + "-" + c + "]"); } } } } /* * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly. * Therefore, it is critical for performance that these methods be * as efficient as possible. */ tree.addListener(SWT.EraseItem, event -> { event.detail &= ~SWT.HOT; if ((event.detail & SWT.SELECTED) != 0) { GC gc = event.gc; Rectangle area = tree.getClientArea(); /* * If you wish to paint the selection beyond the end of * last column, you must change the clipping region. */ int columnCount1 = tree.getColumnCount(); if (event.index == columnCount1 - 1 || columnCount1 == 0) { int width = area.x + area.width - event.x; if (width > 0) { Region region = new Region(); gc.getClipping(region); region.add(event.x, event.y, width, event.height); gc.setClipping(region); region.dispose(); } } gc.setAdvanced(true); if (gc.getAdvanced()) gc.setAlpha(127); Rectangle rect = event.getBounds(); Color foreground = gc.getForeground(); Color background = gc.getBackground(); gc.setForeground(display.getSystemColor(SWT.COLOR_RED)); gc.setBackground(display.getSystemColor(SWT.COLOR_LIST_BACKGROUND)); gc.fillGradientRectangle(0, rect.y, 500, rect.height, false); // restore colors for subsequent drawing gc.setForeground(foreground); gc.setBackground(background); event.detail &= ~SWT.SELECTED; } }); for (int i = 0; i < columnCount; i++) { tree.getColumn(i).pack(); } tree.setSelection(tree.getItem(0)); shell.setSize(500, 200); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); }
From source file:TreeTableGradient.java
public static void main(String[] args) { final Display display = new Display(); Shell shell = new Shell(display); shell.setText("Custom gradient selection for Tree"); shell.setLayout(new FillLayout()); final Tree tree = new Tree(shell, SWT.MULTI | SWT.FULL_SELECTION); tree.setHeaderVisible(true);/*from ww w . jav a2 s .c o m*/ tree.setLinesVisible(true); int columnCount = 4; for (int i = 0; i < columnCount; i++) { TreeColumn column = new TreeColumn(tree, SWT.NONE); column.setText("Column " + i); } int itemCount = 3; for (int i = 0; i < itemCount; i++) { TreeItem item1 = new TreeItem(tree, SWT.NONE); item1.setText("item " + i); for (int c = 1; c < columnCount; c++) { item1.setText(c, "item [" + i + "-" + c + "]"); } for (int j = 0; j < itemCount; j++) { TreeItem item2 = new TreeItem(item1, SWT.NONE); item2.setText("item [" + i + " " + j + "]"); for (int c = 1; c < columnCount; c++) { item2.setText(c, "item [" + i + " " + j + "-" + c + "]"); } for (int k = 0; k < itemCount; k++) { TreeItem item3 = new TreeItem(item2, SWT.NONE); item3.setText("item [" + i + " " + j + " " + k + "]"); for (int c = 1; c < columnCount; c++) { item3.setText(c, "item [" + i + " " + j + " " + k + "-" + c + "]"); } } } } /* * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly. * Therefore, it is critical for performance that these methods be as * efficient as possible. */ tree.addListener(SWT.EraseItem, new Listener() { public void handleEvent(Event event) { if ((event.detail & SWT.SELECTED) != 0) { GC gc = event.gc; Rectangle area = tree.getClientArea(); /* * If you wish to paint the selection beyond the end of last column, * you must change the clipping region. */ int columnCount = tree.getColumnCount(); if (event.index == columnCount - 1 || columnCount == 0) { int width = area.x + area.width - event.x; if (width > 0) { Region region = new Region(); gc.getClipping(region); region.add(event.x, event.y, width, event.height); gc.setClipping(region); region.dispose(); } } gc.setAdvanced(true); if (gc.getAdvanced()) gc.setAlpha(127); Rectangle rect = event.getBounds(); Color foreground = gc.getForeground(); Color background = gc.getBackground(); gc.setForeground(display.getSystemColor(SWT.COLOR_RED)); gc.setBackground(display.getSystemColor(SWT.COLOR_LIST_BACKGROUND)); gc.fillGradientRectangle(0, rect.y, 500, rect.height, false); // restore colors for subsequent drawing gc.setForeground(foreground); gc.setBackground(background); event.detail &= ~SWT.SELECTED; } } }); for (int i = 0; i < columnCount; i++) { tree.getColumn(i).pack(); } tree.setSelection(tree.getItem(0)); shell.setSize(500, 200); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); }
From source file:CustomControlExample.java
void packColumns(Tree tree) { if (multipleColumns.getSelection()) { int columnCount = tree.getColumnCount(); for (int i = 0; i < columnCount; i++) { TreeColumn treeColumn = tree.getColumn(i); treeColumn.pack();/*ww w. ja v a 2s. c om*/ } } }