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[SWT] user defined data table
2022-07-24 15:40:00 【Boy Baoding】
Purpose
Use SWT Technical custom data tables , This article is a good introduction , given SWT The basic idea and simple implementation of building data tables . More special requirements, namely, the realization of table functions, will be continued ……
Ideas
Data table is composed of table header and two sides of table body .
The header of the form is fixed , The right side of the field contains a simple table tool – Sort ;
The body of the table is important for displaying data , It needs to support scrolling , This example only realizes vertical scrolling （ Horizontal rolling can be completed by referring to vertical rolling ）
Technical aspects . Scrolling can be used ScrolledComposite Scroll components , Data table layout uses GridLayout complete .
Realization
In this case , Still show the effect in the editor , The specific steps are as follows ：
- plugin.xml Define editor
<!-- Editor -SWT Custom form -->
<editor class="com.xzbd.editors.CustomTableEditor" default="false" extensions="ctb" icon="icons/20220417/chenggongtishi.png" id="com.xzbd.editor.CustomTableEditor" name=" Editor -SWT Custom form ">
</editor>
- Editor implementation class
package com.xzbd.editors;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorSite;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.part.EditorPart;
import com.xzbd.views.CustomTableEditorViewer;
public class CustomTableEditor extends EditorPart {
public static String ID = "com.xzbd.editors.CustomTableEditor";
public boolean isDirty = false;
private CustomTableEditorViewer viewer;
@Override
public void doSave(IProgressMonitor monitor) {
clearDirty();
}
@Override
public void doSaveAs() {
}
@Override
public void init(IEditorSite site, IEditorInput input) throws PartInitException {
this.setSite(site);
this.setInput(input);
}
@Override
public boolean isDirty() {
return isDirty;
}
@Override
public boolean isSaveAsAllowed() {
return false;
}
@Override
public void createPartControl(Composite parent) {
viewer = new CustomTableEditorViewer(parent, this);
}
@Override
public void setFocus() {
}
/** * Transition editor state * * @param isDirty */
public void changeDirtyState(boolean isDirty) {
this.isDirty = isDirty;
firePropertyChange(PROP_DIRTY);
}
public void toDirty() {
changeDirtyState(true);
}
public void clearDirty() {
changeDirtyState(false);
}
}
- View implementation class
package com.xzbd.views;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.events.ControlListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Widget;
import com.xzbd.editors.CustomTableEditor;
import com.xzbd.utils.LayoutUtil;
import com.xzbd.utils.SWTResourceManager;
/** * * SWT- Customize the data table editor view * */
public class CustomTableEditorViewer {
private CustomTableEditor editor;
private Composite parent;
public CustomTableEditorViewer(Composite parent, CustomTableEditor editor) {
this.parent = parent;
// cache Editor
setEditor(editor);
// draw UI
buildPageUI();
}
// establish UI
private void buildPageUI() {
// Set up parent Layout
parent.setLayout(new FillLayout());
Composite contaniner = new Composite(parent, SWT.NONE);
contaniner.setLayout(new GridLayout());
Label descLabel = new Label(contaniner, SWT.NONE);
descLabel.setText(" This form is completely customized , Although it's relatively simple , But it can be used as a custom table prototype ");
Label sepratorLine = new Label(contaniner, SWT.SEPARATOR | SWT.HORIZONTAL);
sepratorLine.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
Composite header = new Composite(contaniner, SWT.NONE);
header.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
header.setLayout(new GridLayout(4, false));
for (int j = 0; j < 4; j++) {
Composite col = new Composite(header, SWT.NONE);
col.setLayout(new GridLayout(2, false));
col.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
Label label = new Label(col, SWT.None);
label.setText(" Column -00" + j + 1);
Composite tools = new Composite(col, SWT.NONE);
tools.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
tools.setLayout(LayoutUtil.clearMarin(new GridLayout()));
Label asc = new Label(tools, SWT.NONE);
asc.setImage(SWTResourceManager.getImage(CustomTableEditorViewer.class, "/icons/sort-up.png"));
Boolean[] check = {
false };
Boolean[] line = {
false };
asc.addPaintListener(e -> {
if (line[0] || check[0]) {
GC gc = e.gc;
Rectangle bounds = asc.getBounds();
// gc.setForeground(ColorConstant.MAIN_BLUE);
gc.drawRectangle(0, 0, bounds.width - 1, bounds.height - 1);
gc.dispose();
}
});
asc.addListener(SWT.MouseEnter, e -> {
line[0] = true;
asc.redraw();
});
asc.addListener(SWT.MouseExit, e -> {
if (check[0]) {
return;
}
line[0] = false;
asc.redraw();
});
asc.addListener(SWT.MouseDown, e -> {
check[0] = !check[0];
asc.redraw();
});
Label desc = new Label(tools, SWT.PUSH);
desc.setImage(SWTResourceManager.getImage(CustomTableEditorViewer.class, "/icons/sort-down.png"));
}
Label seprator = new Label(contaniner, SWT.SEPARATOR | SWT.HORIZONTAL);
seprator.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
Composite scContaniner = new Composite(contaniner, SWT.NONE);
scContaniner.setLayoutData(new GridData(GridData.FILL_BOTH));
scContaniner.setLayout(new FillLayout());
// Sliding panel
ScrolledComposite sc = new ScrolledComposite(scContaniner, SWT.H_SCROLL | SWT.V_SCROLL);
Composite content = new Composite(sc, SWT.None);
content.setLayout(new GridLayout());
// content.setBackground(SWTResourceManager.getColor(SWT.COLOR_RED));
Color activeColor = SWTResourceManager.getColor(SWT.COLOR_GRAY);
Listener activeListener = e -> {
Control widget = (Control) e.widget;
widget.setBackground(activeColor);
};
Listener defaultListener = e -> {
Control widget = (Control) e.widget;
widget.setBackground(null);
};
for (int i = 0; i < 100; i++) {
Composite row = new Composite(content, SWT.NONE);
GridData gridData = new GridData(GridData.FILL_HORIZONTAL);
row.setLayoutData(gridData);
row.setLayout(new GridLayout(4, false));
for (int j = 0; j < 4; j++) {
Label label = new Label(row, SWT.None);
label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
label.setText(i + " That's ok " + j + " Column ： " + i + " - " + j);
// Event binding
label.addListener(SWT.MouseEnter, activeListener);
label.addListener(SWT.MouseExit, defaultListener);
}
Label rowSeprator = new Label(content, SWT.SEPARATOR | SWT.HORIZONTAL);
rowSeprator.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
// Event binding
row.addListener(SWT.MouseEnter, activeListener);
row.addListener(SWT.MouseExit, defaultListener);
}
sc.setExpandHorizontal(true);
sc.setExpandVertical(true);
sc.addControlListener(ControlListener.controlResizedAdapter(e -> {
Rectangle r = sc.getClientArea();
sc.setMinSize(content.computeSize(r.width, SWT.DEFAULT));
}));
// Set sliding content
sc.setContent(content);
content.setSize(content.computeSize(SWT.DEFAULT, SWT.DEFAULT));
// sc Redraw , Otherwise it doesn't show Slide content
sc.layout();
}
public CustomTableEditor getEditor() {
return editor;
}
public void setEditor(CustomTableEditor editor) {
this.editor = editor;
}
private void addDirtyListener(Widget com) {
com.addListener(SWT.Modify, e->{
editor.toDirty();
});
}
}
The tool classes used , Please refer to the relevant source code in the project , Project address :https://gitee.com/xzbd/epx
effect
summary
This article USES the SWT Medium ScrolledComposite 、 GridLayout and SWT Event implements a simple data table implementation , The table function is relatively simple , But it is enlightening enough , Readers can implement more complex tables based on this .
SWT Test implementation
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CLabel;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.events.ControlListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Layout;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Widget;
import com.xzbd.swt01.core.ColorConstant;
import com.xzbd.swt01.utils.LayoutUtil;
import com.xzbd.swt01.utils.SWTResourceManager;
import com.xzbd.swt01.utils.SWTTools;
public class ScrolledCompositeTest {
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setText("SWT Custom data table ");
shell.setLayout(new FillLayout());
Composite contaniner = new Composite(shell, SWT.NONE);
contaniner.setLayout(new GridLayout());
Composite header = new Composite(contaniner, SWT.NONE);
header.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
header.setLayout(new GridLayout(4, false));
for (int j = 0; j < 4; j++) {
Composite col = new Composite(header, SWT.NONE);
col.setLayout(new GridLayout(2, false));
col.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
Label label = new Label(col, SWT.None);
label.setText(" Column -00" + j + 1);
Composite tools = new Composite(col, SWT.NONE);
tools.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
tools.setLayout(LayoutUtil.clearMarin(new GridLayout()));
Label asc = new Label(tools, SWT.NONE);
asc.setImage(SWTResourceManager.getImage(ScrolledCompositeTest.class, "/icons/sort-up.png"));
Boolean[] check = {
false };
Boolean[] line = {
false };
asc.addPaintListener(e -> {
if (line[0] || check[0]) {
GC gc = e.gc;
Rectangle bounds = asc.getBounds();
// gc.setForeground(ColorConstant.MAIN_BLUE);
gc.drawRectangle(0, 0, bounds.width - 1, bounds.height - 1);
gc.dispose();
}
});
asc.addListener(SWT.MouseEnter, e -> {
line[0] = true;
asc.redraw();
});
asc.addListener(SWT.MouseExit, e -> {
if (check[0]) {
return;
}
line[0] = false;
asc.redraw();
});
asc.addListener(SWT.MouseDown, e -> {
check[0] = !check[0];
asc.redraw();
});
Label desc = new Label(tools, SWT.PUSH);
desc.setImage(SWTResourceManager.getImage(ScrolledCompositeTest.class, "/icons/sort-down.png"));
}
Label seprator = new Label(contaniner, SWT.SEPARATOR | SWT.HORIZONTAL);
seprator.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
Composite scContaniner = new Composite(contaniner, SWT.NONE);
scContaniner.setLayoutData(new GridData(GridData.FILL_BOTH));
scContaniner.setLayout(new FillLayout());
// Sliding panel
ScrolledComposite sc = new ScrolledComposite(scContaniner, SWT.H_SCROLL | SWT.V_SCROLL);
Composite content = new Composite(sc, SWT.None);
content.setLayout(new GridLayout());
// content.setBackground(SWTResourceManager.getColor(SWT.COLOR_RED));
Color activeColor = SWTResourceManager.getColor(SWT.COLOR_GRAY);
Listener activeListener = e -> {
Control widget = (Control) e.widget;
widget.setBackground(activeColor);
};
Listener defaultListener = e -> {
Control widget = (Control) e.widget;
widget.setBackground(null);
};
for (int i = 0; i < 100; i++) {
Composite row = new Composite(content, SWT.NONE);
GridData gridData = new GridData(GridData.FILL_HORIZONTAL);
row.setLayoutData(gridData);
row.setLayout(new GridLayout(4, false));
for (int j = 0; j < 4; j++) {
Label label = new Label(row, SWT.None);
label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
label.setText(i + " That's ok " + j + " Column ： " + i + " - " + j);
// Event binding
label.addListener(SWT.MouseEnter, activeListener);
label.addListener(SWT.MouseExit, defaultListener);
}
Label rowSeprator = new Label(content, SWT.SEPARATOR | SWT.HORIZONTAL);
rowSeprator.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
// Event binding
row.addListener(SWT.MouseEnter, activeListener);
row.addListener(SWT.MouseExit, defaultListener);
}
sc.setExpandHorizontal(true);
sc.setExpandVertical(true);
sc.addControlListener(ControlListener.controlResizedAdapter(e -> {
Rectangle r = sc.getClientArea();
sc.setMinSize(content.computeSize(r.width, SWT.DEFAULT));
}));
// Set sliding content
sc.setContent(content);
content.setSize(content.computeSize(SWT.DEFAULT, SWT.DEFAULT));
// sc Redraw , Otherwise it doesn't show Slide content
sc.layout();
shell.setSize(800, 720);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
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