/*
* Copyright (c) 2017, MGrossmann
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the jo-widgets.org nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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package org.jowidgets.nattable.impl.plugin.listener;
import org.eclipse.nebula.widgets.nattable.NatTable;
import org.eclipse.nebula.widgets.nattable.selection.IRowSelectionModel;
import org.eclipse.nebula.widgets.nattable.selection.action.SelectCellAction;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.jowidgets.spi.impl.swt.common.dnd.SwtDragSource;
import org.jowidgets.util.Assert;
public final class CellSelectionListener extends MouseAdapter {
private static final int DELAY = 500;
private final NatTable natTable;
private final SwtDragSource dragSource;
private final IRowSelectionModel<Integer> rowSelectionModel;
private int lastMouseDownTimestamp = -1;
private int lastRowIndex = -1;
public CellSelectionListener(
final NatTable natTable,
final SwtDragSource dragSource,
final IRowSelectionModel<Integer> rowSelectionModel) {
Assert.paramNotNull(rowSelectionModel, "rowSelectionModel");
Assert.paramNotNull(dragSource, "dragSource");
Assert.paramNotNull(rowSelectionModel, "rowSelectionModel");
this.natTable = natTable;
this.dragSource = dragSource;
this.rowSelectionModel = rowSelectionModel;
}
@Override
public void mouseDown(final MouseEvent e) {
handleMouseEvent(e, true);
}
@Override
public void mouseUp(final MouseEvent e) {
handleMouseEvent(e, false);
}
private void handleMouseEvent(final MouseEvent event, final boolean down) {
final int rowIndex = getRowIndex(event);
if (rowIndex == -1) {
return;
}
final boolean leftButton = event.button == 1;
final boolean rightButton = event.button == 3;
final boolean shift = (event.stateMask & SWT.SHIFT) > 0;
final boolean ctrl = (event.stateMask & SWT.CTRL) > 0;
final boolean isSelected = rowSelectionModel.isRowPositionSelected(rowIndex);
final boolean isDragSourceActive = dragSource.isActive();
if (!isSelected && down && rightButton && !shift && !ctrl) {
runSelectionAction(event);
}
else if (!isDragSourceActive && down && leftButton) {
runSelectionAction(event);
}
else if (isDragSourceActive && down && leftButton) {
if (!isSelected) {
runSelectionAction(event);
}
else {
lastMouseDownTimestamp = event.time;
lastRowIndex = rowIndex;
}
}
else if (isDragSourceActive && !down && (event.time - lastMouseDownTimestamp) < DELAY && lastRowIndex == rowIndex) {
runSelectionAction(event);
}
}
private int getRowIndex(final MouseEvent event) {
final int rowPositionByY = natTable.getRowPositionByY(event.y);
if (rowPositionByY <= 0) {
return -1;
}
else {
return natTable.getRowIndexByPosition(rowPositionByY);
}
}
private void runSelectionAction(final MouseEvent event) {
new SelectCellAction().run(natTable, event);
}
}