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clean up of ToolTip handler

This commit is contained in:
Eyck Jentzsch 2020-03-21 07:31:14 +01:00
parent 210d925987
commit cea11743eb
1 changed files with 64 additions and 92 deletions
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154
com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/swt/internal/ToolTipHandler.java
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@ -3,9 +3,9 @@ package com.minres.scviewer.database.swt.internal;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.events.MouseMoveListener;
import org.eclipse.swt.events.MouseTrackAdapter;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
@ -29,87 +29,63 @@ import com.minres.scviewer.database.swt.ToolTipTableContentProvider;
class ToolTipHandler {
private final Display display;
private Shell parentShell;
private Shell tipShell;
private Label tipLabelText;
private Table tipTable;
private Shell shell;
private Label label;
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 final TableColumn[] columns;
private static final int hoverYOffset = 1;
private static final String[] COLUMN_NAMES = { "Name", "Value"};
private static final int MAX_CHARS = 48;
// The names of the first 32 characters
private Color[] colors = new Color[MAX_CHARS];
/**
* Creates a new tooltip handler
*
* @param parent the parent Shell
*/
public ToolTipHandler(Shell parent) {
final Display display = parent.getDisplay();
display = parent.getDisplay();
this.parentShell = parent;
tipShell = new Shell(parent, SWT.ON_TOP | SWT.TOOL);
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;
tipShell.setLayout(gridLayout);
shell.setLayout(gridLayout);
tipShell.setBackground(display.getSystemColor(SWT.COLOR_INFO_BACKGROUND));
shell.setBackground(display.getSystemColor(SWT.COLOR_INFO_BACKGROUND));
tipLabelText = new Label(tipShell, SWT.NONE);
tipLabelText.setForeground(display.getSystemColor(SWT.COLOR_INFO_FOREGROUND));
tipLabelText.setBackground(display.getSystemColor(SWT.COLOR_INFO_BACKGROUND));
tipLabelText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL |GridData.VERTICAL_ALIGN_CENTER));
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);
tipTable = new Table(tipShell, SWT.NONE);
tipTable.setHeaderVisible(true);
tipTable.setLinesVisible(true);
tipTable.setFont(font);
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));
columns = createColumns(tipTable);
nameCol = new TableColumn(table, SWT.LEFT);
nameCol.setText("Name");
valueCol = new TableColumn(table, SWT.LEFT);
nameCol.setText("Value");
tipTable.setRedraw(false);
for (int i = 0; i < MAX_CHARS; i++) {
// Create a background color for this row
colors[i] = new Color(tipTable.getDisplay(), 255 - i, 127 + i, i);
// Create the row in the table by creating
// a TableItem and setting text for each
// column
int c = 0;
TableItem item = new TableItem(tipTable, SWT.NONE);
item.setText(c++, String.valueOf((char) i));
item.setText(c++, String.valueOf(i));
item.setBackground(colors[i]);
}
// Now that we've set the text into the columns,
// we call pack() on each one to size it to the
// contents.
for (int i = 0, n = columns.length; i < n; i++)
columns[i].pack();
// Set redraw back to true so that the table
// will paint appropriately
tipTable.setRedraw(true);
}
private TableColumn[] createColumns(Table table) {
TableColumn[] columns = new TableColumn[COLUMN_NAMES.length];
for (int i = 0, n = columns.length; i < n; i++) {
columns[i] = new TableColumn(table, SWT.LEFT);
columns[i].setText(COLUMN_NAMES[i]);
}
return columns;
shell.addPaintListener(new PaintListener() {
@Override
public void paintControl(PaintEvent e) {
Rectangle area = shell.getClientArea();
valueCol.setWidth(area.width - nameCol.getWidth());
}
});
}
/**
@ -122,27 +98,16 @@ class ToolTipHandler {
* Get out of the way if we attempt to activate the control underneath the tooltip
*/
control.addMouseListener(MouseListener.mouseDownAdapter(e -> {
if (tipShell.isVisible())
tipShell.setVisible(false);
if (shell.isVisible())
shell.setVisible(false);
}));
/*
* get out of the way if we move the mouse
*/
control.addMouseMoveListener(new MouseMoveListener() {
@Override
public void mouseMove(MouseEvent e) {
if (tipShell.isVisible())
tipShell.setVisible(false);
}
});
/*
* Trap hover events to pop-up tooltip
*/
control.addMouseTrackListener(new MouseTrackAdapter () {
@Override
public void mouseExit(MouseEvent e) {
if (tipShell.isVisible()) tipShell.setVisible(false);
if (shell.isVisible()) shell.setVisible(false);
tipWidget = null;
}
@Override
@ -162,45 +127,47 @@ class ToolTipHandler {
widget = w.getItem (pt);
}
if (widget == null) {
tipShell.setVisible(false);
shell.setVisible(false);
tipWidget = null;
return;
}
if (widget == tipWidget && tipShell.isVisible()) return;
Point newPos = control.toDisplay(pt);
if(shell.isFocusControl()) return;
if (widget == tipWidget && tipPosition.equals(newPos) && shell.isVisible()) return;
tipWidget = widget;
tipPosition = control.toDisplay(pt);
tipPosition = newPos;
boolean showDialog = false;
Object o = widget.getData(Constants.CONTENT_PROVIDER_TAG);
if(o != null) {
ToolTipTableContentProvider provider = ((ToolTipTableContentProvider)o).initialize(widget, pt);
tipLabelText.setText(provider.getTableTitle());
tipTable.setRedraw(false);
tipTable.removeAll();
label.setText(provider.getTableTitle());
table.setRedraw(false);
table.removeAll();
for (String[] strings : provider.getTableContent()) {
if(strings.length>0) {
showDialog=true;
TableItem item = new TableItem(tipTable, SWT.NONE);
TableItem item = new TableItem(table, SWT.NONE);
item.setText(0, strings[0]);
if(strings.length>1)
item.setText(1, strings[1]);
}
}
for (int i = 0, n = columns.length; i < n; i++)
columns[i].pack();
tipTable.setRedraw(true);
tipTable.setVisible(true);
nameCol.pack();
valueCol.pack();
table.setRedraw(true);
table.setVisible(true);
} else {
tipTable.setVisible(false);
table.setVisible(false);
}
String text = (String) widget.getData(Constants.TEXT_PROVIDER_TAG);
if(text != null) {
tipLabelText.setText(text != null ? text : "Hover test should go here");
label.setText(text != null ? text : "Hover test should go here");
showDialog=true;
}
if(showDialog) {
tipShell.pack();
setHoverLocation(tipShell, tipPosition);
tipShell.setVisible(true);
shell.pack();
setHoverLocation(shell, tipPosition);
shell.setVisible(true);
}
}
});
@ -215,8 +182,8 @@ class ToolTipHandler {
String text = handler.getHelpText(tipWidget);
if (text == null) return;
if (tipShell.isVisible()) {
tipShell.setVisible(false);
if (shell.isVisible()) {
shell.setVisible(false);
Shell helpShell = new Shell(parentShell, SWT.SHELL_TRIM);
helpShell.setLayout(new FillLayout());
Label label = new Label(helpShell, SWT.NONE);
@ -226,6 +193,11 @@ class ToolTipHandler {
helpShell.open();
}
});
// control.addKeyListener(KeyListener.keyPressedAdapter( e-> {
// if (e.keyCode == SWT.F2 && shell.isVisible()) {
// shell.setFocus();
// }
// }));
}
/**