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High quality UI controls and other tools to complement the core JavaFX distribution
/**
* Copyright (c) 2013, 2018 ControlsFX
* 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 ControlsFX, any associated website, 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 CONTROLSFX 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 impl.org.controlsfx.skin;
import impl.org.controlsfx.ReflectionUtils;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.collections.WeakListChangeListener;
import javafx.scene.control.skin.VirtualContainerBase;
import javafx.scene.control.skin.VirtualFlow;
import org.controlsfx.control.GridView;
public class GridViewSkin extends VirtualContainerBase, GridRow> {
private VirtualFlow> flow;
private final ListChangeListener gridViewItemsListener = change -> {
updateItemCount();
getSkinnable().requestLayout();
};
private final WeakListChangeListener weakGridViewItemsListener = new WeakListChangeListener<>(gridViewItemsListener);
@SuppressWarnings("rawtypes")
public GridViewSkin(GridView control) {
super(control);
flow = ReflectionUtils.getVirtualFlow(this);
updateGridViewItems();
flow.setId("virtual-flow"); //$NON-NLS-1$
flow.setPannable(false);
flow.setVertical(true);
flow.setFocusTraversable(getSkinnable().isFocusTraversable());
flow.setCellFactory(param -> createCell());
getChildren().add(flow);
updateItemCount();
// Register listeners
registerChangeListener(control.itemsProperty(), e -> updateGridViewItems());
registerChangeListener(control.cellFactoryProperty(), e -> ReflectionUtils.recreateCells(flow));
registerChangeListener(control.parentProperty(), e -> {
if (getSkinnable().getParent() != null && getSkinnable().isVisible()) {
getSkinnable().requestLayout();
}
});
registerChangeListener(control.cellHeightProperty(), e -> ReflectionUtils.recreateCells(flow));
registerChangeListener(control.cellWidthProperty(), e -> {
updateItemCount();
ReflectionUtils.recreateCells(flow);
});
registerChangeListener(control.horizontalCellSpacingProperty(), e -> {
updateItemCount();
ReflectionUtils.recreateCells(flow);
});
registerChangeListener(control.verticalCellSpacingProperty(), e -> ReflectionUtils.recreateCells(flow));
registerChangeListener(control.widthProperty(), e -> updateItemCount());
registerChangeListener(control.heightProperty(), e -> updateItemCount());
}
public void updateGridViewItems() {
if (getSkinnable().getItems() != null) {
getSkinnable().getItems().removeListener(weakGridViewItemsListener);
}
if (getSkinnable().getItems() != null) {
getSkinnable().getItems().addListener(weakGridViewItemsListener);
}
updateItemCount();
ReflectionUtils.recreateCells(flow);
getSkinnable().requestLayout();
}
@Override protected void layoutChildren(double x, double y, double w, double h) {
double x1 = getSkinnable().getInsets().getLeft();
double y1 = getSkinnable().getInsets().getTop();
double w1 = getSkinnable().getWidth() - (getSkinnable().getInsets().getLeft() + getSkinnable().getInsets().getRight());
double h1 = getSkinnable().getHeight() - (getSkinnable().getInsets().getTop() + getSkinnable().getInsets().getBottom());
flow.resizeRelocate(x1, y1, w1, h1);
}
/**
* Returns the number of row needed to display the whole set of cells
* @return GridView row count
*/
@Override public int getItemCount() {
final ObservableList items = getSkinnable().getItems();
// Fix for #98 : int division should be cast to get the result as
// double and ceiled to get the max int of it (as we are looking for
// the max number of necessary row)
return items == null ? 0 : (int)Math.ceil((double)items.size() / computeMaxCellsInRow());
}
@Override
protected void updateItemCount() {
if (flow == null)
return;
int oldCount = flow.getCellCount();
int newCount = getItemCount();
if (newCount != oldCount) {
flow.setCellCount(newCount);
ReflectionUtils.rebuildCells(flow);
} else {
ReflectionUtils.reconfigureCells(flow);
}
updateRows(newCount);
getSkinnable().requestLayout();
}
/**
* Returns the max number of cell per row
* @return Max cell number per row
*/
public int computeMaxCellsInRow() {
return Math.max((int) Math.floor(computeRowWidth() / computeCellWidth()), 1);
}
/**
* Returns the width of a row
* (should be GridView.width - GridView.Scrollbar.width)
* @return Computed width of a row
*/
protected double computeRowWidth() {
// Fix for #98 : width calculation should take the scrollbar size
// into account
// TODO: need to figure out how to get the real scrollbar width and
// replace the 18 value
return getSkinnable().getWidth() - 18;
}
/**
* Returns the width of a cell
* @return Computed width of a cell
*/
protected double computeCellWidth() {
return getSkinnable().cellWidthProperty().doubleValue() + (getSkinnable().horizontalCellSpacingProperty().doubleValue() * 2);
}
protected void updateRows(int rowCount) {
for (int i = 0; i < rowCount; i++) {
GridRow row = flow.getVisibleCell(i);
if (row != null) {
// We do not have to force a change of the index by setting the index to -1
// before setting it to its actual value. GridRow will update its cells every
// time updateIndex is called even if the index did not change.
row.updateIndex(i);
}
}
}
@Override protected double computeMinHeight(double height, double topInset, double rightInset, double bottomInset,
double leftInset) {
return 0;
}
private GridRow createCell() {
GridRow row = new GridRow<>();
row.updateGridView(getSkinnable());
return row;
}
}