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- /*
- * Copyright 2000-2016 Vaadin Ltd.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
- package com.vaadin.client.ui.colorpicker;
-
- import com.google.gwt.dom.client.Element;
- import com.google.gwt.event.dom.client.ClickEvent;
- import com.google.gwt.event.dom.client.ClickHandler;
- import com.google.gwt.event.dom.client.HasClickHandlers;
- import com.google.gwt.event.shared.HandlerRegistration;
- import com.google.gwt.user.client.ui.AbsolutePanel;
- import com.google.gwt.user.client.ui.Grid;
- import com.google.gwt.user.client.ui.HTMLTable.Cell;
-
- /**
- * Client side implementation for ColorPickerGrid.
- *
- * @since 7.0.0
- *
- */
- public class VColorPickerGrid extends AbsolutePanel
- implements ClickHandler, HasClickHandlers {
-
- private int rows = 1;
- private int columns = 1;
-
- private Grid grid;
-
- private boolean gridLoaded = false;
-
- private int selectedX;
- private int selectedY;
-
- /**
- * Instantiates the client side component for a color picker grid.
- */
- public VColorPickerGrid() {
- super();
-
- this.add(createGrid(), 0, 0);
- }
-
- /**
- * Creates a grid according to the current row and column count information.
- *
- * @return grid
- */
- private Grid createGrid() {
- grid = new Grid(rows, columns);
- grid.setWidth("100%");
- grid.setHeight("100%");
- grid.addClickHandler(this);
- return grid;
- }
-
- /**
- * Updates the row and column count and creates a new grid based on them.
- * The new grid replaces the old grid if one existed.
- * <p>
- * For internal use only. May be renamed or removed in a future release.
- *
- * @param rowCount
- * @param columnCount
- */
- public void updateGrid(int rowCount, int columnCount) {
- rows = rowCount;
- columns = columnCount;
- this.remove(grid);
- this.add(createGrid(), 0, 0);
- }
-
- /**
- * Updates the changed colors within the grid based on the given x- and
- * y-coordinates. Nothing happens if any of the parameters is null or the
- * parameter lengths don't match.
- * <p>
- * For internal use only. May be renamed or removed in a future release.
- *
- * @param changedColor
- * @param changedX
- * @param changedY
- */
- public void updateColor(String[] changedColor, String[] changedX,
- String[] changedY) {
- if (changedColor != null && changedX != null && changedY != null) {
- if (changedColor.length == changedX.length
- && changedX.length == changedY.length) {
- for (int c = 0; c < changedColor.length; c++) {
- Element element = grid.getCellFormatter().getElement(
- Integer.parseInt(changedX[c]),
- Integer.parseInt(changedY[c]));
- element.getStyle().setProperty("background",
- changedColor[c]);
- }
- }
-
- gridLoaded = true;
- }
- }
-
- /**
- * Returns currently selected x-coordinate of the grid.
- */
- public int getSelectedX() {
- return selectedX;
- }
-
- /**
- * Returns currently selected y-coordinate of the grid.
- */
- public int getSelectedY() {
- return selectedY;
- }
-
- /**
- * Returns true if the colors have been successfully updated at least once,
- * false otherwise.
- * <p>
- * For internal use only. May be renamed or removed in a future release.
- */
- public boolean isGridLoaded() {
- return gridLoaded;
- }
-
- @Override
- public void onClick(ClickEvent event) {
- Cell cell = grid.getCellForEvent(event);
- if (cell == null) {
- return;
- }
-
- selectedY = cell.getRowIndex();
- selectedX = cell.getCellIndex();
- }
-
- @Override
- public HandlerRegistration addClickHandler(ClickHandler handler) {
- return addDomHandler(handler, ClickEvent.getType());
- }
-
- }
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