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High quality UI controls and other tools to complement the core JavaFX distribution
/**
* Copyright (c) 2013, 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 java.util.Collections;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.collections.WeakListChangeListener;
import javafx.util.Callback;
import org.controlsfx.control.GridView;
import com.sun.javafx.css.StyleManager;
import com.sun.javafx.scene.control.behavior.BehaviorBase;
import com.sun.javafx.scene.control.behavior.KeyBinding;
import com.sun.javafx.scene.control.skin.VirtualContainerBase;
import com.sun.javafx.scene.control.skin.VirtualFlow;
public class GridViewSkin extends VirtualContainerBase, BehaviorBase>, GridRow> {
static {
// refer to ControlsFXControl for why this is necessary
StyleManager.getInstance().addUserAgentStylesheet(
GridView.class.getResource("gridview.css").toExternalForm()); //$NON-NLS-1$
}
private final ListChangeListener gridViewItemsListener = new ListChangeListener() {
@Override public void onChanged(ListChangeListener.Change change) {
updateRowCount();
getSkinnable().requestLayout();
}
};
private final WeakListChangeListener weakGridViewItemsListener = new WeakListChangeListener<>(gridViewItemsListener);
@SuppressWarnings("rawtypes")
public GridViewSkin(GridView control) {
super(control, new BehaviorBase<>(control, Collections.emptyList()));
updateGridViewItems();
flow.setId("virtual-flow"); //$NON-NLS-1$
flow.setPannable(false);
flow.setVertical(true);
flow.setFocusTraversable(getSkinnable().isFocusTraversable());
flow.setCreateCell(new Callback>() {
@Override public GridRow call(VirtualFlow flow) {
return GridViewSkin.this.createCell();
}
});
getChildren().add(flow);
updateRowCount();
// Register listeners
registerChangeListener(control.itemsProperty(), "ITEMS"); //$NON-NLS-1$
registerChangeListener(control.cellFactoryProperty(), "CELL_FACTORY"); //$NON-NLS-1$
registerChangeListener(control.parentProperty(), "PARENT"); //$NON-NLS-1$
registerChangeListener(control.cellHeightProperty(), "CELL_HEIGHT"); //$NON-NLS-1$
registerChangeListener(control.cellWidthProperty(), "CELL_WIDTH"); //$NON-NLS-1$
registerChangeListener(control.horizontalCellSpacingProperty(), "HORIZONZAL_CELL_SPACING"); //$NON-NLS-1$
registerChangeListener(control.verticalCellSpacingProperty(), "VERTICAL_CELL_SPACING"); //$NON-NLS-1$
registerChangeListener(control.widthProperty(), "WIDTH_PROPERTY"); //$NON-NLS-1$
registerChangeListener(control.heightProperty(), "HEIGHT_PROPERTY"); //$NON-NLS-1$
}
@Override protected void handleControlPropertyChanged(String p) {
super.handleControlPropertyChanged(p);
if (p == "ITEMS") { //$NON-NLS-1$
updateGridViewItems();
} else if (p == "CELL_FACTORY") { //$NON-NLS-1$
flow.recreateCells();
} else if (p == "CELL_HEIGHT") { //$NON-NLS-1$
flow.recreateCells();
} else if (p == "CELL_WIDTH") { //$NON-NLS-1$
updateRowCount();
flow.recreateCells();
} else if (p == "HORIZONZAL_CELL_SPACING") { //$NON-NLS-1$
updateRowCount();
flow.recreateCells();
} else if (p == "VERTICAL_CELL_SPACING") { //$NON-NLS-1$
flow.recreateCells();
} else if (p == "PARENT") { //$NON-NLS-1$
if (getSkinnable().getParent() != null && getSkinnable().isVisible()) {
getSkinnable().requestLayout();
}
} else if (p == "WIDTH_PROPERTY" || p == "HEIGHT_PROPERTY") { //$NON-NLS-1$ //$NON-NLS-2$
updateRowCount();
}
}
public void updateGridViewItems() {
if (getSkinnable().getItems() != null) {
getSkinnable().getItems().removeListener(weakGridViewItemsListener);
}
if (getSkinnable().getItems() != null) {
getSkinnable().getItems().addListener(weakGridViewItemsListener);
}
updateRowCount();
flow.recreateCells();
getSkinnable().requestLayout();
}
@Override protected void updateRowCount() {
if (flow == null)
return;
int oldCount = flow.getCellCount();
int newCount = getItemCount();
if (newCount != oldCount) {
flow.setCellCount(newCount);
flow.recreateCells();
} else {
flow.reconfigureCells();
}
updateRows(newCount);
}
@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);
}
@Override public GridRow createCell() {
GridRow row = new GridRow<>();
row.updateGridView(getSkinnable());
return row;
}
/**
* 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());
}
/**
* 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) {
// FIXME hacky - need to better understand what this is about
row.updateIndex(-1);
row.updateIndex(i);
}
}
}
protected boolean areRowsVisible() {
if (flow == null)
return false;
if (flow.getFirstVisibleCell() == null)
return false;
if (flow.getLastVisibleCell() == null)
return false;
return true;
}
@Override protected double computeMinHeight(double height, double topInset, double rightInset, double bottomInset,
double leftInset) {
return 0;
}
}
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