I have a wizard with table and button components. When I click to the add button I choose from dialog window what items should be added to the table. I confirm items, and then this ones appears in the table with scrollbar. But if I resize the wizard, the table size is changed. How to fix it?
Table before resize:
Table after wizard resize
Composite compositeArea = new Composite(parent, SWT.NONE);
GridLayout layout = new GridLayout();
layout.numColumns = 3;
compositeArea.setLayout(layout);
Table table = new Table(compositeArea, SWT.BORDER | SWT.V_SCROLL);
new TableColumn(someList, SWT.NULL);
table.setLayoutData(new GridData(HORIZONTAL_ALIGN_FILL | GRAB_HORIZONTAL));
** Please note that the use of HORIZONTAL_ALIGN_FILL and GRAB_HORIZONTAL is discouraged. Instead, you should be using the public GridData(int, int, boolean, boolean) constructor. **
To slighly simplify your code snippet (only one column on the composite, and only one default table column - see full code below):
// ...
final Composite compositeArea = new Composite(parent, SWT.NONE);
compositeArea.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
compositeArea.setLayout(new GridLayout());
final Table table = new Table(compositeArea, SWT.BORDER | SWT.V_SCROLL);
table.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL));
// ...
...and we see that the Table isn't fitting in the available space or showing the scrollbar as expected, and the same occurs when the Shell is resized.
In answer to your question, this is because the layout data of the Table doesn't know how to layout vertically - you've only specified two horizontal style attributes.
If we instead use the suggested constructor:
table.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
...the Table takes the available space correct, shows the scrollbar, and updates correctly when the Shell is resized. Using the layout data, we've told the Table to fill the available horizontal space, and the Table will display the scrollbar if necessary.
Full example:
public class TableResizeTest {
private final Display display;
private final Shell shell;
public TableResizeTest() {
display = new Display();
shell = new Shell(display);
shell.setLayout(new FillLayout());
shell.setMaximized(true);
final Composite parent = new Composite(shell, SWT.NONE);
parent.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
parent.setLayout(new GridLayout());
// -- snippet --
final Composite compositeArea = new Composite(parent, SWT.NONE);
compositeArea.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
compositeArea.setLayout(new GridLayout());
final Table table = new Table(compositeArea, SWT.BORDER | SWT.V_SCROLL);
// table.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL));
table.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
// -------------
for (int i = 0; i < 20; ++i) {
new TableItem(table, SWT.NONE).setText(String.valueOf(i));
}
}
public void run() {
shell.setSize(300, 300);
shell.open();
while (!shell.isDisposed()) {
if (display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
public static void main(final String... args) {
new TableResizeTest().run();
}
}
Related
I read all old questions related to this issue but I didn't solve it.
Could someone helps me with this because I'm already run out of ideas.
Here is my code:
ScrolledComposite panelHolder = new ScrolledComposite(composite, SWT.H_SCROLL | SWT.V_SCROLL);
panelHolder.setLayout(new FillLayout());
panelHolder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
FormToolkit toolkit = UIConstants.getToolkit();
toolkit.setBorderStyle(SWT.NONE);
tableViewer = new TableViewer(toolkit.createTable(panelHolder, border ? SWT.BORDER : SWT.NONE));
tableViewer.setContentProvider(new TableContentProvider());
ColumnViewerToolTipSupport.enableFor(tableViewer);
TableViewerColumn viewerColumn = new TableViewerColumn(tableViewer, SWT.NONE);
viewerColumn.setLabelProvider(labelProvider);
Table table = tableViewer.getTable();
table.setLinesVisible(false);
addControlListener(viewerColumn);
panelHolder.setContent(table);
panelHolder.setExpandHorizontal(true);
panelHolder.setExpandVertical(true);
panelHolder.setMinSize(table.computeSize(SWT.DEFAULT, SWT.DEFAULT));
panelHolder.layout();
I'm developing a plugin for eclipse and I'm struggling to use ScrolledComposite as well as making it take up the remaining space.
The parent layout is a 2-column Grid:
#Override
public void createPartControl(Composite parent) {
parent.setLayout(new GridLayout(2, false));
// other views etc
}
The ScrolledComposite is created like so (slightly abbreviated):
private void fillScroll() {
if (scroll != null) {
scroll.dispose();
}
scroll = new ScrolledComposite(parent, SWT.V_SCROLL | SWT.H_SCROLL | SWT.BORDER);
GridData gd = new GridData();
gd.horizontalSpan = 2;
scroll.setLayoutData(gd);
Composite innerContainer = new Composite(scroll, 0);
innerContainer.setLayout(new GridLayout(1, false));
// for loop that adds widgets to innerContainer
scroll.setExpandHorizontal(true);
scroll.setExpandVertical(true);
scroll.setContent(innerContainer);
scroll.setSize(innerContainer.computeSize(SWT.DEFAULT, SWT.DEFAULT));
parent.layout(true);
}
The list of questions are the widgets added in the for loop and are contained by innerContainer.
Expectation: Since innerContainer is too large to fit in the parent, there should be scroll bars.
What actually happens: There are no scroll bars.
How do I fix this problem?
The GridData on the ScrolledComposite needs to have grabExcessVerticalSpace set to true. I suggest you to use the extended constructor in order to clearly define how it should be displayed, for example:
GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1);
Option A: change scroll.setSize to scroll.setMinSize:
scroll.setMinSize(innerContainer.computeSize(SWT.DEFAULT, SWT.DEFAULT));
or, Option B: remove scroll.setExpandHorizontal and scroll.setExpandVertical and change scroll.setSize to innerContainer.setSize:
innerContainer.setSize(innerContainer.computeSize(SWT.DEFAULT, SWT.DEFAULT));
I am using Java's SWT toolkit to create a GUI with text field inputs. These input fields require numerical input and have units assigned to them. I'm trying to create a fancy way to integrate units within the field as a fixed suffix to the text, such that the user can only edit the numerical part. I'd also like for the suffix to be greyed out so the user knows it is disabled - something like the following:
While searching, I saw some solutions with a mask formatter from Swing that might do the trick, but I'm sort of hoping there might be something default with SWT. Any suggestions on how to make this work?
The field is part of a a matrix, so I can't simply add the units to a header label. I suppose I could create another column after the text field that could provide units as a label, but I'm going for something more intuitive and aesthetic.
Any suggestions?
One option would be to group Text and Label widgets in the same composite, and set the text on the Label to the desired suffix:
The area to the left of the suffix is the single-line text field, which can be edited, and the suffix is a disabled Label.
public class TextWithSuffixExample {
public class TextWithSuffix {
public TextWithSuffix(final Composite parent) {
// The border gives the appearance of a single component
final Composite baseComposite = new Composite(parent, SWT.BORDER);
baseComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
final GridLayout baseCompositeGridLayout = new GridLayout(2, false);
baseCompositeGridLayout.marginHeight = 0;
baseCompositeGridLayout.marginWidth = 0;
baseComposite.setLayout(baseCompositeGridLayout);
// You can set the background color and force it on
// the children (the Text and Label objects) to add
// to the illusion of a single component
baseComposite.setBackground(new Color(parent.getDisplay(), new RGB(255, 255, 255)));
baseComposite.setBackgroundMode(SWT.INHERIT_FORCE);
final Text text = new Text(baseComposite, SWT.SINGLE | SWT.RIGHT);
text.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
final Label label = new Label(baseComposite, SWT.NONE);
label.setEnabled(false);
label.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, true));
label.setText("kg/m^3");
}
}
final Display display;
final Shell shell;
public TextWithSuffixExample() {
display = new Display();
shell = new Shell(display);
shell.setLayout(new GridLayout());
shell.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
new TextWithSuffix(shell);
}
public void run() {
shell.setSize(200, 100);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
public static void main(final String[] args) {
new TextWithSuffixExample().run();
}
}
I understand that I have layout but I have problem with setting achivementsChild next to each other. I want to make some alignment or something similar. Now they are standing one below other and I want to set one next to the other.
TabItem tbtmStudent = new TabItem(tabFolder_1, SWT.NONE);
tbtmStudent.setText("Student");
ScrolledComposite scrolledComposite_1 = new ScrolledComposite(tabFolder_1, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
scrolledComposite_1.addMouseWheelListener(new MouseWheelListener() {
public void mouseScrolled(MouseEvent e) {
scrolledComposite.setFocus();
}
});
tbtmStudent.setControl(scrolledComposite_1);
scrolledComposite_1.setExpandHorizontal(true);
scrolledComposite_1.setExpandVertical(true);
List<STUDENT> allSTUDENTNodes = currentData.getStudentNodes();
Composite studentChild = new Composite(scrolledComposite_1, SWT.NONE);
studentChild.setLayout(new GridLayout());
for(STUDENT studentNode: allSTUDENTNodes){
new STUDENTNode(studentChild, SWT.NONE, studentNode);
Composite achivementsChild = new Composite(scrolledComposite_1, SWT.DEFAULT);
achivementsChild.setLayout(new GridLayout());
for(Achivements achivementsNode: studentNode.getAchivements()){
new AchivementsNode(mscbcChild, SWT.NONE, achivementsNode);
}
}
scrolledComposite_1.setContent(studentChild);
scrolledComposite_1.setMinSize(studentChild.computeSize(SWT.DEFAULT, SWT.DEFAULT));
You can specify how many columns you want when you create the GridLayout:
new GridLayout(numberOfColumns, columnsEqual);
numberofColumns is the number of columns you want.
If columnsEqual is true all columns will have the same width, if it is false they will have their preferred size.
I cannot figure out how to correctly set the height of my row composite. I would like the following code snippet to display only one row of data. Any additional rows would be seen by using the scrollbar. I have tried using rowContainer.setSize() but to no avail. Any help would be appreciated.
Please note that the scrolled composite is not directly linked to the rowContainer composite and contains other composites as well.
private void doStuff(final Composite parentContainer) {
final ScrolledComposite scrolledComposite = new ScrolledComposite(
parentContainer, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
scrolledComposite.setExpandHorizontal(true);
scrolledComposite.setExpandVertical(true);
scrolledComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL,
true, true));
final Composite borderComposite = new Composite(scrolledComposite,
SWT.BORDER);
borderComposite.setLayout(new GridLayout(1, false));
borderComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true,
true));
scrolledComposite.setContent(borderComposite);
scrolledComposite.setSize(borderComposite.computeSize(SWT.DEFAULT,
SWT.DEFAULT));
// Create a container for a label and button
final Composite labelAndAddButtonContainer = new Composite(
borderComposite, SWT.NONE);
labelAndAddButtonContainer.setLayout(new GridLayout(2, false));
labelAndAddButtonContainer.setLayoutData(new GridData(SWT.LEFT,
SWT.TOP, false, false));
// Create a container to hold all dynamic rows
final Composite rowContainer = new Composite(borderComposite, SWT.NONE);
rowContainer.setLayout(new GridLayout(1, false));
rowContainer.setLayoutData(new GridData(SWT.FILL, SWT.NONE, true, false));
// Create at least one row.
final Collection<String> rowData = getRowData();
if (rowData.isEmpty()) {
createRow(scrolledComposite, rowContainer, "");
} else {
for (final String text : rowData) {
createRow(scrolledComposite, rowContainer, text);
}
// How do I adjust for the height so that only 1 row shows,
// and scrollbars appear if there is more than one row?
}
// Create a button
final Button addButton = new Button(labelAndAddButtonContainer,
SWT.PUSH);
addButton.setImage(someImage);
final Label label = new Label(labelAndAddButtonContainer, SWT.NONE);
label.setText("SOME_LABEL");
}