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refactor ToolTipHandler to allow more control over content

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This commit is contained in:
Eyck Jentzsch
2020-03-21 08:42:35 +01:00
parent cea11743eb
commit 14ac6654b9
5 changed files with 124 additions and 168 deletions
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1
com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/Constants.java
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@ -7,7 +7,6 @@ public class Constants {
public static final int[] unitMultiplier={1, 3, 10, 30, 100, 300};
public static final String CONTENT_PROVIDER_TAG = "TOOLTIP_CONTENT_PROVIDER";
public static final String TEXT_PROVIDER_TAG = "TOOLTIP_TEXT_PROVIDER";
public static final String HELP_PROVIDER_TAG = "TOOLTIP_HELP_PROVIDER";
}

10
com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/ToolTipContentProvider.java Normal file
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@ -0,0 +1,10 @@
package com.minres.scviewer.database.swt;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Composite;
public interface ToolTipContentProvider {
public boolean createContent(Composite parent, Point pt);
}

21
com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/ToolTipTableContentProvider.java
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@ -1,21 +0,0 @@
package com.minres.scviewer.database.swt;
import java.util.List;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Widget;
public interface ToolTipTableContentProvider {
public ToolTipTableContentProvider initialize(Widget widget, Point pt);
public String getTableTitle();
/**
* Get tool tip table content
* @param widget the widget that is under help
* @oaram pt the point where the mouse cursor is located
* @return a list of string arrays of size 2 (content & value)
*/
public List<String[]> getTableContent();
}

163
com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/internal/ToolTipHandler.java
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@ -12,9 +12,12 @@ 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.layout.RowLayout;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
@ -24,11 +27,11 @@ import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.Widget;
import com.minres.scviewer.database.swt.Constants;
import com.minres.scviewer.database.swt.ToolTipContentProvider;
import com.minres.scviewer.database.swt.ToolTipHelpTextProvider;
import com.minres.scviewer.database.swt.ToolTipTableContentProvider;
class ToolTipHandler {
private final Display display;
private Shell parentShell;
private Shell shell;
@ -36,12 +39,12 @@ class ToolTipHandler {
private Table table;
private TableColumn nameCol;
private TableColumn valueCol;
private Widget tipWidget; // widget this tooltip is hovering over
private Point tipPosition; // the position being hovered over
private static final int hoverYOffset = 1;
/**
* Creates a new tooltip handler
*
@ -49,43 +52,7 @@ class ToolTipHandler {
*/
public ToolTipHandler(Shell parent) {
display = parent.getDisplay();
this.parentShell = parent;
shell = new Shell(parent, SWT.ON_TOP | SWT.NO_FOCUS | SWT.TOOL);
GridLayout gridLayout = new GridLayout();
gridLayout.numColumns = 1;
gridLayout.marginWidth = 2;
gridLayout.marginHeight = 2;
shell.setLayout(gridLayout);
shell.setBackground(display.getSystemColor(SWT.COLOR_INFO_BACKGROUND));
label = new Label(shell, SWT.NONE);
label.setForeground(display.getSystemColor(SWT.COLOR_INFO_FOREGROUND));
label.setBackground(display.getSystemColor(SWT.COLOR_INFO_BACKGROUND));
label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL |GridData.VERTICAL_ALIGN_CENTER));
final Font font = new Font(Display.getCurrent(), "Terminal", 10, SWT.NORMAL);
table = new Table(shell, SWT.NONE);
table.setHeaderVisible(false);
table.setLinesVisible(true);
table.setFont(font);
table.setForeground(display.getSystemColor(SWT.COLOR_INFO_FOREGROUND));
table.setBackground(display.getSystemColor(SWT.COLOR_INFO_BACKGROUND));
table.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
nameCol = new TableColumn(table, SWT.LEFT);
nameCol.setText("Name");
valueCol = new TableColumn(table, SWT.LEFT);
nameCol.setText("Value");
shell.addPaintListener(new PaintListener() {
@Override
public void paintControl(PaintEvent e) {
Rectangle area = shell.getClientArea();
valueCol.setWidth(area.width - nameCol.getWidth());
}
});
parentShell = parent;
}
/**
@ -94,83 +61,45 @@ class ToolTipHandler {
* @control the control on which to enable hoverhelp
*/
public void activateHoverHelp(final Control control) {
/*
* Get out of the way if we attempt to activate the control underneath the tooltip
*/
control.addMouseListener(MouseListener.mouseDownAdapter(e -> {
if (shell.isVisible())
shell.setVisible(false);
}));
/*
* Trap hover events to pop-up tooltip
*/
control.addMouseTrackListener(new MouseTrackAdapter () {
Listener listener = new Listener () {
Shell tip = null;
@Override
public void mouseExit(MouseEvent e) {
if (shell.isVisible()) shell.setVisible(false);
tipWidget = null;
}
@Override
public void mouseHover (MouseEvent event) {
Point pt = new Point (event.x, event.y);
Widget widget = event.widget;
if (widget instanceof ToolBar) {
ToolBar w = (ToolBar) widget;
widget = w.getItem (pt);
public void handleEvent (Event event) {
switch (event.type) {
case SWT.Dispose:
case SWT.KeyDown:
case SWT.MouseMove: {
if (tip == null) break;
tip.dispose ();
tip = null;
label = null;
break;
}
if (widget instanceof Table) {
Table w = (Table) widget;
widget = w.getItem (pt);
}
if (widget instanceof Tree) {
Tree w = (Tree) widget;
widget = w.getItem (pt);
}
if (widget == null) {
shell.setVisible(false);
tipWidget = null;
return;
}
Point newPos = control.toDisplay(pt);
if(shell.isFocusControl()) return;
if (widget == tipWidget && tipPosition.equals(newPos) && shell.isVisible()) return;
tipWidget = widget;
tipPosition = newPos;
boolean showDialog = false;
Object o = widget.getData(Constants.CONTENT_PROVIDER_TAG);
if(o != null) {
ToolTipTableContentProvider provider = ((ToolTipTableContentProvider)o).initialize(widget, pt);
label.setText(provider.getTableTitle());
table.setRedraw(false);
table.removeAll();
for (String[] strings : provider.getTableContent()) {
if(strings.length>0) {
showDialog=true;
TableItem item = new TableItem(table, SWT.NONE);
item.setText(0, strings[0]);
if(strings.length>1)
item.setText(1, strings[1]);
}
case SWT.MouseHover: {
Object o = control.getData(Constants.CONTENT_PROVIDER_TAG);
if(o != null && o instanceof ToolTipContentProvider) {
ToolTipContentProvider provider = ((ToolTipContentProvider)o);
Point pt = new Point (event.x, event.y);
tipPosition = control.toDisplay(pt);
if (tip != null && !tip.isDisposed ()) tip.dispose ();
tip = new Shell (parentShell, SWT.ON_TOP | SWT.NO_FOCUS | SWT.TOOL);
tip.setBackground (display.getSystemColor (SWT.COLOR_INFO_BACKGROUND));
RowLayout layout=new RowLayout(SWT.VERTICAL);
layout.fill=true;
tip.setLayout(layout);
boolean visible = provider.createContent(tip, pt);
tip.pack();
setHoverLocation(tip, tipPosition);
tip.setVisible (visible);
}
nameCol.pack();
valueCol.pack();
table.setRedraw(true);
table.setVisible(true);
} else {
table.setVisible(false);
}
String text = (String) widget.getData(Constants.TEXT_PROVIDER_TAG);
if(text != null) {
label.setText(text != null ? text : "Hover test should go here");
showDialog=true;
}
if(showDialog) {
shell.pack();
setHoverLocation(shell, tipPosition);
shell.setVisible(true);
}
}
});
};
control.addListener (SWT.Dispose, listener);
control.addListener (SWT.KeyDown, listener);
control.addListener (SWT.MouseMove, listener);
control.addListener (SWT.MouseHover, listener);
/*
* Trap F1 Help to pop up a custom help box
@ -193,11 +122,11 @@ class ToolTipHandler {
helpShell.open();
}
});
// control.addKeyListener(KeyListener.keyPressedAdapter( e-> {
// if (e.keyCode == SWT.F2 && shell.isVisible()) {
// shell.setFocus();
// }
// }));
// control.addKeyListener(KeyListener.keyPressedAdapter( e-> {
// if (e.keyCode == SWT.F2 && shell.isVisible()) {
// shell.setFocus();
// }
// }));
}
/**