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Experimental components for JavaFX 2
/**
* GridViewSkin.java
*
* Copyright (c) 2011-2015, JFXtras
* 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 organization 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 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 LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package jfxtras.labs.internal.scene.control.skin;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import jfxtras.labs.internal.scene.control.behavior.GridViewBehavior;
import jfxtras.labs.scene.control.grid.GridCell;
import jfxtras.labs.scene.control.grid.GridView;
import jfxtras.labs.scene.control.grid.cell.DefaultGridCell;
/**
*
* @author Hendrik Ebbers
*
*/
public class GridViewSkin extends com.sun.javafx.scene.control.skin.BehaviorSkinBase, GridViewBehavior> {
private ListChangeListener itemsListener;
private ChangeListener layoutListener;
private ChangeListener> itemListChangedListener;
public GridViewSkin(GridView control) {
super(control, new GridViewBehavior<>(control));
layoutListener = new ChangeListener() {
@Override
public void changed(ObservableValue arg0,
Number arg1, Number arg2) {
getSkinnable().requestLayout();
}
};
itemsListener = new ListChangeListener() {
@Override
public void onChanged(Change change) {
while (change.next()) {
int start = change.getFrom();
int end = change.getTo();
if (change.wasReplaced() || change.wasAdded()
|| change.wasPermutated() || change.wasUpdated()) {
for (int i = start; i < end; i++) {
if (change.wasReplaced()) {
replaceCell(i);
} else if (change.wasAdded()) {
addCell(i);
} else if (change.wasPermutated()) {
// TODO: what to do know??
updateAllCells();
} else if (change.wasRemoved()) {
removeCell(i);
} else if (change.wasUpdated()) {
updateCell(i);
}
}
} else if (change.wasRemoved()) {
for (int i = start; i <= end; i++) {
removeCell(i);
}
}
}
}
};
itemListChangedListener = new ChangeListener>() {
@Override
public void changed(
ObservableValue> arg0,
ObservableList oldList, ObservableList newList) {
if (oldList != null) {
oldList.removeListener(itemsListener);
}
if (newList != null) {
newList.addListener(itemsListener);
}
updateAllCells();
}
};
getSkinnable().itemsProperty().addListener(itemListChangedListener);
ObservableList currentList = getSkinnable().itemsProperty().get();
if (currentList != null) {
currentList.addListener(itemsListener);
}
getSkinnable().cellHeightProperty().addListener(layoutListener);
getSkinnable().cellWidthProperty().addListener(layoutListener);
getSkinnable().verticalCellSpacingProperty()
.addListener(layoutListener);
getSkinnable().horizontalCellSpacingProperty().addListener(
layoutListener);
updateAllCells();
}
public void updateAllCells() {
getChildren().clear();
ObservableList items = getSkinnable().getItems();
if (items != null) {
for (int index = 0; index < items.size(); index++) {
T item = items.get(index);
GridCell cell = createCell();
cell.setItem(item);
cell.updateIndex(index);
getChildren().add(cell);
}
}
getSkinnable().requestLayout();
}
private void removeCell(int index) {
getChildren().remove(index);
// TODO: Update Index for all following cells
getSkinnable().requestLayout();
}
private void replaceCell(int index) {
getChildren().remove(index);
addCell(index);
}
@SuppressWarnings({ "rawtypes", "unchecked" })
private void updateCell(int index) {
T item = getSkinnable().getItems().get(index);
((GridCell) getChildren().get(index)).setItem(item);
}
private void addCell(int index) {
T item = getSkinnable().getItems().get(index);
GridCell cell = createCell();
cell.setItem(item);
cell.updateIndex(index);
getChildren().add(index, cell);
// TODO: Update Index for all following cells
getSkinnable().requestLayout();
}
private GridCell createCell() {
GridCell cell;
if (getSkinnable().getCellFactory() != null) {
cell = getSkinnable().getCellFactory().call(getSkinnable());
} else {
cell = createDefaultCellImpl();
}
return cell;
}
protected GridCell createDefaultCellImpl() {
return new DefaultGridCell();
}
// remove compilation problem
// @Override
// protected void layoutChildren() {
// super.layoutChildren();
// double currentWidth = getWidth();
// double cellWidth = getSkinnable().getCellWidth();
// double cellHeight = getSkinnable().getCellHeight();
// double horizontalCellSpacing = getSkinnable()
// .getHorizontalCellSpacing();
// double verticalCellSpacing = getSkinnable().getVerticalCellSpacing();
//
// double xPos = 0;
// double yPos = 0;
//
// HPos currentHorizontalAlignment = getSkinnable()
// .getHorizontalAlignment();
// if (currentHorizontalAlignment != null) {
// if (currentHorizontalAlignment.equals(HPos.CENTER)) {
// xPos = (currentWidth % computeCellWidth()) / 2;
// } else if (currentHorizontalAlignment.equals(HPos.RIGHT)) {
// xPos = currentWidth % computeCellWidth();
// }
// }
//
// for (Node child : getChildren()) {
// if (xPos + horizontalCellSpacing + cellWidth
// + horizontalCellSpacing > currentWidth) {
// // new line
// xPos = 0;
// if (currentHorizontalAlignment != null) {
// if (currentHorizontalAlignment.equals(HPos.CENTER)) {
// xPos = (currentWidth % computeCellWidth()) / 2;
// } else if (currentHorizontalAlignment.equals(HPos.RIGHT)) {
// xPos = currentWidth % computeCellWidth();
// }
// }
//
// yPos = yPos + verticalCellSpacing + cellHeight
// + verticalCellSpacing;
// }
// child.relocate(xPos + horizontalCellSpacing, yPos
// + verticalCellSpacing);
// child.resize(cellWidth, cellHeight);
// xPos = xPos + horizontalCellSpacing + cellWidth
// + horizontalCellSpacing;
// ;
// }
// }
// remove compilation problem
// @Override
// public Orientation getContentBias() {
// return Orientation.HORIZONTAL;
// }
protected double computeCellWidth() {
return getSkinnable().cellWidthProperty().doubleValue()
+ getSkinnable().horizontalCellSpacingProperty().doubleValue()
+ getSkinnable().horizontalCellSpacingProperty().doubleValue();
}
protected double computeCellHeight() {
return getSkinnable().cellHeightProperty().doubleValue()
+ getSkinnable().verticalCellSpacingProperty().doubleValue()
+ getSkinnable().verticalCellSpacingProperty().doubleValue();
}
@Override
protected double computeMinHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) {
return computeCellHeight();
}
@Override
protected double computeMinWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) {
return computeCellWidth();
}
@Override
protected double computeMaxHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) {
return Double.MAX_VALUE;
}
@Override
protected double computeMaxWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) {
return Double.MAX_VALUE;
}
@Override
protected double computePrefHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) {
int maxCellsInRow = computeMaxCellsInRow(width);
int rowCount = (int) Math.floor((double) getSkinnable().getItems()
.size() / (double) maxCellsInRow);
return rowCount * computeCellHeight();
}
@Override
protected double computePrefWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) {
int maxCellsInColumn = computeMaxCellsInColumn(height);
int columnCount = (int) Math.floor((double) getSkinnable().getItems()
.size() / (double) maxCellsInColumn);
return columnCount * computeCellWidth();
}
public int computeRowIndexForItem(int itemIndex) {
int maxCellsInRow = computeMaxCellsInRow();
return itemIndex / maxCellsInRow;
}
public int computeColumnIndexForItem(int itemIndex) {
int maxCellsInRow = computeMaxCellsInRow();
return itemIndex % maxCellsInRow;
}
public int computeMaxCellsInRow() {
return computeMaxCellsInRow(getSkinnable().getWidth());
}
public int computeCurrentRowCount() {
return (int) Math.ceil((double) getSkinnable().getItems().size()
/ (double) computeMaxCellsInRow());
}
public int computeMaxCellsInRow(double width) {
return Math.max((int) Math.floor(width / computeCellWidth()), 1);
}
public int computeMaxCellsInColumn(double height) {
return Math.max((int) Math.floor(height / computeCellHeight()), 1);
}
}