| /******************************************************************************* |
| * Copyright (c) 2000, 2003 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 |
| *******************************************************************************/ |
| package org.eclipse.swt.examples.layoutexample; |
| |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.custom.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| import org.eclipse.swt.graphics.*; |
| |
| class GridLayoutTab extends Tab { |
| /* Controls for setting layout parameters */ |
| Text numColumns; |
| Button makeColumnsEqualWidth; |
| Combo marginHeight, marginWidth, horizontalSpacing, verticalSpacing; |
| /* The example layout instance */ |
| GridLayout gridLayout; |
| /* TableEditors and related controls*/ |
| TableEditor comboEditor, widthEditor, heightEditor; |
| TableEditor vAlignEditor, hAlignEditor, hIndentEditor; |
| TableEditor hSpanEditor, vSpanEditor, hGrabEditor, vGrabEditor; |
| CCombo combo, vAlign, hAlign, hGrab, vGrab; |
| Text widthText, heightText, hIndent, hSpan, vSpan; |
| |
| /* Constants */ |
| final int COMBO_COL = 1; |
| final int WIDTH_COL = 2; |
| final int HEIGHT_COL = 3; |
| final int HALIGN_COL = 4; |
| final int VALIGN_COL = 5; |
| final int HINDENT_COL = 6; |
| final int HSPAN_COL = 7; |
| final int VSPAN_COL = 8; |
| final int HGRAB_COL = 9; |
| final int VGRAB_COL = 10; |
| |
| final int TOTAL_COLS = 11; |
| |
| /** |
| * Creates the Tab within a given instance of LayoutExample. |
| */ |
| GridLayoutTab(LayoutExample instance) { |
| super(instance); |
| } |
| |
| /** |
| * Creates the widgets in the "child" group. |
| */ |
| void createChildWidgets () { |
| /* Create the TraverseListener */ |
| final TraverseListener traverseListener = new TraverseListener () { |
| public void keyTraversed (TraverseEvent e) { |
| if (e.detail == SWT.TRAVERSE_RETURN || e.detail == SWT.TRAVERSE_TAB_NEXT) |
| resetEditors (); |
| if (e.detail == SWT.TRAVERSE_ESCAPE) |
| disposeEditors (); |
| } |
| }; |
| |
| /* Add common controls */ |
| super.createChildWidgets (); |
| |
| /* Add TableEditors */ |
| comboEditor = new TableEditor (table); |
| widthEditor = new TableEditor (table); |
| heightEditor = new TableEditor (table); |
| vAlignEditor = new TableEditor (table); |
| hAlignEditor = new TableEditor (table); |
| hIndentEditor = new TableEditor (table); |
| hSpanEditor = new TableEditor (table); |
| vSpanEditor = new TableEditor (table); |
| hGrabEditor = new TableEditor (table); |
| vGrabEditor = new TableEditor (table); |
| table.addMouseListener (new MouseAdapter () { |
| public void mouseDown(MouseEvent e) { |
| resetEditors(); |
| index = table.getSelectionIndex (); |
| Point pt = new Point (e.x, e.y); |
| newItem = table.getItem (pt); |
| if (newItem == null) return; |
| TableItem oldItem = comboEditor.getItem (); |
| if (newItem == oldItem || newItem != lastSelected) { |
| lastSelected = newItem; |
| return; |
| } |
| table.showSelection (); |
| |
| combo = new CCombo (table, SWT.READ_ONLY); |
| createComboEditor (combo, comboEditor); |
| |
| widthText = new Text (table, SWT.SINGLE); |
| widthText.setText (((String [])data.elementAt (index)) [WIDTH_COL]); |
| createTextEditor (widthText, widthEditor, WIDTH_COL); |
| |
| heightText = new Text (table, SWT.SINGLE); |
| heightText.setText (((String [])data.elementAt (index)) [HEIGHT_COL]); |
| createTextEditor (heightText, heightEditor, HEIGHT_COL); |
| String [] alignValues = new String [] {"BEGINNING","CENTER","END","FILL"}; |
| hAlign = new CCombo (table, SWT.NONE); |
| hAlign.setItems (alignValues); |
| hAlign.setText (newItem.getText (HALIGN_COL)); |
| hAlignEditor.horizontalAlignment = SWT.LEFT; |
| hAlignEditor.grabHorizontal = true; |
| hAlignEditor.minimumWidth = 50; |
| hAlignEditor.setEditor (hAlign, newItem, HALIGN_COL); |
| hAlign.addTraverseListener (traverseListener); |
| |
| vAlign = new CCombo (table, SWT.NONE); |
| vAlign.setItems (alignValues); |
| vAlign.setText (newItem.getText (VALIGN_COL)); |
| vAlignEditor.horizontalAlignment = SWT.LEFT; |
| vAlignEditor.grabHorizontal = true; |
| vAlignEditor.minimumWidth = 50; |
| vAlignEditor.setEditor (vAlign, newItem, VALIGN_COL); |
| vAlign.addTraverseListener (traverseListener); |
| |
| hIndent = new Text (table, SWT.SINGLE); |
| hIndent.setText (((String [])data.elementAt (index)) [HINDENT_COL]); |
| createTextEditor (hIndent, hIndentEditor, HINDENT_COL); |
| |
| hSpan = new Text (table, SWT.SINGLE); |
| hSpan.setText (((String [])data.elementAt (index)) [HSPAN_COL]); |
| createTextEditor (hSpan, hSpanEditor, HSPAN_COL); |
| |
| vSpan = new Text (table, SWT.SINGLE); |
| vSpan.setText (((String [])data.elementAt (index)) [VSPAN_COL]); |
| createTextEditor (vSpan, vSpanEditor, VSPAN_COL); |
| |
| String [] boolValues = new String [] {"false","true"}; |
| hGrab = new CCombo (table, SWT.NONE); |
| hGrab.setItems (boolValues); |
| hGrab.setText (newItem.getText (HGRAB_COL)); |
| hGrabEditor.horizontalAlignment = SWT.LEFT; |
| hGrabEditor.grabHorizontal = true; |
| hGrabEditor.minimumWidth = 50; |
| hGrabEditor.setEditor (hGrab, newItem, HGRAB_COL); |
| hGrab.addTraverseListener (traverseListener); |
| |
| vGrab = new CCombo (table, SWT.NONE); |
| vGrab.setItems (boolValues); |
| vGrab.setText (newItem.getText (VGRAB_COL)); |
| vGrabEditor.horizontalAlignment = SWT.LEFT; |
| vGrabEditor.grabHorizontal = true; |
| vGrabEditor.minimumWidth = 50; |
| vGrabEditor.setEditor (vGrab, newItem, VGRAB_COL); |
| vGrab.addTraverseListener (traverseListener); |
| |
| for (int i=0; i<table.getColumnCount (); i++) { |
| Rectangle rect = newItem.getBounds (i); |
| if (rect.contains (pt)) { |
| switch (i) { |
| case COMBO_COL : |
| combo.setFocus (); |
| break; |
| case WIDTH_COL : |
| widthText.setFocus (); |
| break; |
| case HEIGHT_COL : |
| heightText.setFocus (); |
| break; |
| case HALIGN_COL : |
| hAlign.setFocus (); |
| break; |
| case VALIGN_COL : |
| vAlign.setFocus (); |
| break; |
| case HINDENT_COL : |
| hIndent.setFocus (); |
| break; |
| case HSPAN_COL : |
| hSpan.setFocus (); |
| break; |
| case VSPAN_COL : |
| vSpan.setFocus (); |
| break; |
| case HGRAB_COL : |
| hGrab.setFocus (); |
| break; |
| case VGRAB_COL : |
| vGrab.setFocus (); |
| break; |
| default : |
| resetEditors (); |
| break; |
| } |
| } |
| } |
| } |
| }); |
| |
| /* Add listener to add an element to the table */ |
| add.addSelectionListener(new SelectionAdapter () { |
| public void widgetSelected(SelectionEvent e) { |
| TableItem item = new TableItem (table, 0); |
| String [] insert = new String [] { |
| String.valueOf (table.indexOf (item)), "Button", |
| "-1","-1","BEGINNING","CENTER", |
| "0","1","1","false","false"}; |
| item.setText (insert); |
| data.addElement (insert); |
| resetEditors (); |
| } |
| }); |
| } |
| |
| /** |
| * Creates the control widgets. |
| */ |
| void createControlWidgets () { |
| /* Rearrange the layout of the control group */ |
| size.setLayoutData (new GridData ()); |
| |
| /* Controls the margins and spacing of the GridLayout */ |
| String [] marginValues = new String [] {"0","3","5","10"}; |
| Group marginGroup = new Group (controlGroup, SWT.NONE); |
| marginGroup.setText (LayoutExample.getResourceString ("Margins_Spacing")); |
| GridData data = new GridData (GridData.FILL_HORIZONTAL); |
| data.verticalSpan = 2; |
| marginGroup.setLayoutData (data); |
| GridLayout layout = new GridLayout (); |
| layout.numColumns = 2; |
| marginGroup.setLayout (layout); |
| new Label (marginGroup, SWT.NONE).setText ("marginHeight"); |
| marginHeight = new Combo (marginGroup, SWT.NONE); |
| marginHeight.setItems (marginValues); |
| marginHeight.select (2); |
| data = new GridData (GridData.FILL_HORIZONTAL); |
| data.widthHint = 60; |
| marginHeight.setLayoutData (data); |
| marginHeight.addSelectionListener (selectionListener); |
| marginHeight.addTraverseListener (traverseListener); |
| new Label (marginGroup, SWT.NONE).setText ("marginWidth"); |
| marginWidth = new Combo (marginGroup, SWT.NONE); |
| marginWidth.setItems (marginValues); |
| marginWidth.select (2); |
| data = new GridData (GridData.FILL_HORIZONTAL); |
| data.widthHint = 60; |
| marginWidth.setLayoutData (data); |
| marginWidth.addSelectionListener (selectionListener); |
| marginWidth.addTraverseListener (traverseListener); |
| new Label (marginGroup, SWT.NONE).setText ("horizontalSpacing"); |
| horizontalSpacing = new Combo (marginGroup, SWT.NONE); |
| horizontalSpacing.setItems (marginValues); |
| horizontalSpacing.select (2); |
| data = new GridData (GridData.FILL_HORIZONTAL); |
| data.widthHint = 60; |
| horizontalSpacing.setLayoutData (data); |
| horizontalSpacing.addSelectionListener (selectionListener); |
| horizontalSpacing.addTraverseListener (traverseListener); |
| new Label (marginGroup, SWT.NONE).setText ("verticalSpacing"); |
| verticalSpacing = new Combo (marginGroup, SWT.NONE); |
| verticalSpacing.setItems (marginValues); |
| verticalSpacing.select (2); |
| data = new GridData (GridData.FILL_HORIZONTAL); |
| data.widthHint = 60; |
| verticalSpacing.setLayoutData (data); |
| verticalSpacing.addSelectionListener (selectionListener); |
| verticalSpacing.addTraverseListener (traverseListener); |
| |
| /* Controls the columns in the GridLayout */ |
| Group columnGroup = new Group (controlGroup, SWT.NONE); |
| columnGroup.setText (LayoutExample.getResourceString ("Columns")); |
| layout = new GridLayout (); |
| layout.numColumns = 2; |
| columnGroup.setLayout (layout); |
| data = new GridData (GridData.VERTICAL_ALIGN_FILL); |
| columnGroup.setLayoutData (data); |
| numColumns = new Text (columnGroup, SWT.BORDER); |
| numColumns.setText ("1"); |
| numColumns.addSelectionListener (selectionListener); |
| numColumns.addTraverseListener (traverseListener); |
| data = new GridData (GridData.FILL_HORIZONTAL); |
| data.widthHint = 15; |
| numColumns.setLayoutData (data); |
| new Label (columnGroup, SWT.NONE).setText ("numColumns"); |
| makeColumnsEqualWidth = new Button (columnGroup, SWT.CHECK); |
| makeColumnsEqualWidth.setText ("makeColumnsEqualWidth"); |
| makeColumnsEqualWidth.addSelectionListener (selectionListener); |
| data = new GridData (GridData.FILL_HORIZONTAL); |
| data.horizontalSpan = 2; |
| data.horizontalIndent = 14; |
| makeColumnsEqualWidth.setLayoutData (data); |
| |
| /* Add common controls */ |
| super.createControlWidgets (); |
| controlGroup.pack(); |
| } |
| |
| /** |
| * Creates the example layout. |
| */ |
| void createLayout () { |
| gridLayout = new GridLayout (); |
| layoutComposite.setLayout (gridLayout); |
| } |
| |
| /** |
| * Disposes the editors without placing their contents |
| * into the table. |
| */ |
| void disposeEditors () { |
| comboEditor.setEditor (null, null, -1); |
| combo.dispose (); |
| widthText.dispose (); |
| heightText.dispose (); |
| hAlign.dispose (); |
| vAlign.dispose (); |
| hIndent.dispose (); |
| hSpan.dispose (); |
| vSpan.dispose (); |
| hGrab.dispose (); |
| vGrab.dispose (); |
| } |
| |
| /** |
| * Generates code for the example layout. |
| */ |
| StringBuffer generateLayoutCode () { |
| StringBuffer code = new StringBuffer (); |
| code.append ("\t\tGridLayout gridLayout = new GridLayout ();\n"); |
| if (gridLayout.numColumns != 1) { |
| code.append ("\t\tgridLayout.numColumns = " + gridLayout.numColumns + ";\n"); |
| } |
| if (gridLayout.makeColumnsEqualWidth) { |
| code.append ("\t\tgridLayout.makeColumnsEqualWidth = true;\n"); |
| } |
| if (gridLayout.marginHeight != 5) { |
| code.append ("\t\tgridLayout.marginHeight = " + gridLayout.marginHeight + ";\n"); |
| } |
| if (gridLayout.marginWidth != 5) { |
| code.append ("\t\tgridLayout.marginWidth = " + gridLayout.marginWidth + ";\n"); |
| } |
| if (gridLayout.horizontalSpacing != 5) { |
| code.append ("\t\tgridLayout.horizontalSpacing = " + gridLayout.horizontalSpacing + ";\n"); |
| } |
| if (gridLayout.verticalSpacing != 5) { |
| code.append ("\t\tgridLayout.verticalSpacing = " + gridLayout.verticalSpacing + ";\n"); |
| } |
| code.append ("\t\tshell.setLayout (gridLayout);\n"); |
| |
| boolean first = true; |
| for (int i = 0; i < children.length; i++) { |
| Control control = children [i]; |
| code.append (getChildCode (control, i)); |
| GridData data = (GridData) control.getLayoutData (); |
| if (data != null) { |
| code.append ("\t\t"); |
| if (first) { |
| code.append ("GridData "); |
| first = false; |
| } |
| code.append ("data = new GridData ();\n"); |
| if (data.widthHint != SWT.DEFAULT) { |
| code.append ("\t\tdata.widthHint = " + data.widthHint + ";\n"); |
| } |
| if (data.heightHint != SWT.DEFAULT) { |
| code.append ("\t\tdata.heightHint = " + data.heightHint + ";\n"); |
| } |
| if (data.horizontalAlignment != GridData.BEGINNING) { |
| String alignment; |
| int hAlignment = data.horizontalAlignment; |
| if (hAlignment == GridData.CENTER) alignment = "GridData.CENTER"; |
| else if (hAlignment == GridData.END) alignment = "GridData.END"; |
| else alignment = "GridData.FILL"; |
| code.append ("\t\tdata.horizontalAlignment = " + alignment + ";\n"); |
| } |
| if (data.verticalAlignment != GridData.CENTER) { |
| String alignment; |
| int vAlignment = data.verticalAlignment; |
| if (vAlignment == GridData.BEGINNING) alignment = "GridData.BEGINNING"; |
| else if (vAlignment == GridData.END) alignment = "GridData.END"; |
| else alignment = "GridData.FILL"; |
| code.append ("\t\tdata.verticalAlignment = " + alignment + ";\n"); |
| } |
| if (data.horizontalIndent != 0) { |
| code.append ("\t\tdata.horizontalIndent = " + data.horizontalIndent + ";\n"); |
| } |
| if (data.horizontalSpan != 1) { |
| code.append ("\t\tdata.horizontalSpan = " + data.horizontalSpan + ";\n"); |
| } |
| if (data.verticalSpan != 1) { |
| code.append ("\t\tdata.verticalSpan = " + data.verticalSpan + ";\n"); |
| } |
| if (data.grabExcessHorizontalSpace) { |
| code.append ("\t\tdata.grabExcessHorizontalSpace = true;\n"); |
| } |
| if (data.grabExcessVerticalSpace) { |
| code.append ("\t\tdata.grabExcessVerticalSpace = true;\n"); |
| } |
| if (code.substring (code.length () - 33).equals ("GridData data = new GridData ();\n")) { |
| code.delete (code.length () - 33, code.length ()); |
| first = true; |
| } else if (code.substring (code.length () - 24).equals ("data = new GridData ();\n")) { |
| code.delete (code.length () - 24, code.length ()); |
| } else { |
| code.append ("\t\t" + names [i] + ".setLayoutData (data);\n"); |
| } |
| } |
| } |
| return code; |
| } |
| |
| /** |
| * Returns the layout data field names. |
| */ |
| String [] getLayoutDataFieldNames() { |
| return new String [] { |
| "", |
| "Control", |
| "width", |
| "height", |
| "horizontalAlignment", |
| "verticalAlignment", |
| "horizontalIndent", |
| "horizontalSpan", |
| "verticalSpan", |
| "grabExcessHorizontalSpace", |
| "grabExcessVerticalSpace" |
| }; |
| } |
| |
| /** |
| * Gets the text for the tab folder item. |
| */ |
| String getTabText () { |
| return "GridLayout"; |
| } |
| |
| /** |
| * Takes information from TableEditors and stores it. |
| */ |
| void resetEditors () { |
| resetEditors (false); |
| } |
| |
| void resetEditors (boolean tab) { |
| TableItem oldItem = comboEditor.getItem (); |
| if (oldItem != null) { |
| int row = table.indexOf (oldItem); |
| try { |
| new Integer (widthText.getText ()).intValue (); |
| } catch (NumberFormatException e) { |
| widthText.setText (oldItem.getText (WIDTH_COL)); |
| } |
| try { |
| new Integer (heightText.getText ()).intValue (); |
| } catch (NumberFormatException e) { |
| heightText.setText (oldItem.getText (HEIGHT_COL)); |
| } |
| try { |
| new Integer (hIndent.getText ()).intValue (); |
| } catch (NumberFormatException e) { |
| hIndent.setText (oldItem.getText (HINDENT_COL)); |
| } |
| try { |
| new Integer (hSpan.getText ()).intValue (); |
| } catch (NumberFormatException e) { |
| hSpan.setText (oldItem.getText (HSPAN_COL)); |
| } |
| try { |
| new Integer (vSpan.getText ()).intValue (); |
| } catch (NumberFormatException e) { |
| vSpan.setText (oldItem.getText (VSPAN_COL)); |
| } |
| String [] insert = new String [] { |
| String.valueOf (row), combo.getText (), widthText.getText (), heightText.getText (), |
| hAlign.getText (), vAlign.getText (), hIndent.getText (), |
| hSpan.getText (), vSpan.getText (), hGrab.getText (), vGrab.getText () |
| }; |
| data.setElementAt (insert, row); |
| for (int i = 0; i < TOTAL_COLS; i++) { |
| oldItem.setText (i, ((String [])data.elementAt (row)) [i]); |
| } |
| if (!tab) disposeEditors (); |
| } |
| setLayoutState (); |
| refreshLayoutComposite (); |
| setLayoutData (); |
| layoutComposite.layout (true); |
| layoutGroup.layout (true); |
| } |
| |
| /** |
| * Sets the layout data for the children of the layout. |
| */ |
| void setLayoutData () { |
| Control [] children = layoutComposite.getChildren (); |
| TableItem [] items = table.getItems (); |
| GridData data; |
| int hIndent, hSpan, vSpan; |
| String vAlign, hAlign, vGrab, hGrab; |
| for (int i = 0; i < children.length; i++) { |
| data = new GridData (); |
| /* Set widthHint and heightHint */ |
| data.widthHint = new Integer (items [i].getText (WIDTH_COL)).intValue (); |
| data.heightHint = new Integer (items [i].getText (HEIGHT_COL)).intValue (); |
| /* Set vertical alignment and horizontal alignment */ |
| hAlign = items [i].getText (HALIGN_COL); |
| if (hAlign.equals ("CENTER")) { |
| data.horizontalAlignment = GridData.CENTER; |
| } else if (hAlign.equals ("END")) { |
| data.horizontalAlignment = GridData.END; |
| } else if (hAlign.equals ("FILL")) { |
| data.horizontalAlignment = GridData.FILL; |
| } else { |
| data.horizontalAlignment = GridData.BEGINNING; |
| } |
| vAlign = items [i].getText (VALIGN_COL); |
| if (vAlign.equals ("BEGINNING")) { |
| data.verticalAlignment = GridData.BEGINNING; |
| } else if (vAlign.equals ("END")) { |
| data.verticalAlignment = GridData.END; |
| } else if (vAlign.equals ("FILL")) { |
| data.verticalAlignment = GridData.FILL; |
| } else { |
| data.verticalAlignment = GridData.CENTER; |
| } |
| /* Set indents and spans */ |
| hIndent = new Integer (items [i].getText (HINDENT_COL)).intValue (); |
| data.horizontalIndent = hIndent; |
| hSpan = new Integer (items [i].getText (HSPAN_COL)).intValue (); |
| data.horizontalSpan = hSpan; |
| vSpan = new Integer (items [i].getText (VSPAN_COL)).intValue (); |
| data.verticalSpan = vSpan; |
| /* Set grabbers */ |
| hGrab = items [i].getText (HGRAB_COL); |
| if (hGrab.equals ("true")) { |
| data.grabExcessHorizontalSpace = true; |
| } else { |
| data.grabExcessHorizontalSpace = false; |
| } |
| vGrab = items [i].getText (VGRAB_COL); |
| if (vGrab.equals ("true")) { |
| data.grabExcessVerticalSpace = true; |
| } else { |
| data.grabExcessVerticalSpace = false; |
| } |
| children [i].setLayoutData (data); |
| } |
| } |
| |
| /** |
| * Sets the state of the layout. |
| */ |
| void setLayoutState () { |
| /* Set the columns for the layout */ |
| try { |
| gridLayout.numColumns = new Integer (numColumns.getText ()).intValue (); |
| } catch (NumberFormatException e) { |
| gridLayout.numColumns = 1; |
| } |
| gridLayout.makeColumnsEqualWidth = makeColumnsEqualWidth.getSelection (); |
| |
| /* Set the margins and spacing */ |
| try { |
| gridLayout.marginHeight = new Integer (marginHeight.getText ()).intValue (); |
| } catch (NumberFormatException e) { |
| gridLayout.marginHeight = 5; |
| marginHeight.select (2); |
| } |
| try { |
| gridLayout.marginWidth = new Integer (marginWidth.getText ()).intValue (); |
| } catch (NumberFormatException e) { |
| gridLayout.marginWidth = 5; |
| marginWidth.select (2); |
| } |
| try { |
| gridLayout.horizontalSpacing = new Integer (horizontalSpacing.getText ()).intValue (); |
| } catch (NumberFormatException e) { |
| gridLayout.horizontalSpacing = 5; |
| horizontalSpacing.select (2); |
| } |
| try { |
| gridLayout.verticalSpacing = new Integer (verticalSpacing.getText ()).intValue (); |
| } catch (NumberFormatException e) { |
| gridLayout.verticalSpacing = 5; |
| verticalSpacing.select (2); |
| } |
| } |
| } |