Java tutorial
package org.gwtbootstrap3.client.ui.base.button; /* * #%L * GwtBootstrap3 * %% * Copyright (C) 2013 GwtBootstrap3 * %% * 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. * #L% */ import org.gwtbootstrap3.client.ui.Icon; import org.gwtbootstrap3.client.ui.base.ComplexWidget; import org.gwtbootstrap3.client.ui.base.HasIcon; import org.gwtbootstrap3.client.ui.base.HasIconPosition; import org.gwtbootstrap3.client.ui.constants.IconFlip; import org.gwtbootstrap3.client.ui.constants.IconPosition; import org.gwtbootstrap3.client.ui.constants.IconRotate; import org.gwtbootstrap3.client.ui.constants.IconSize; import org.gwtbootstrap3.client.ui.constants.IconType; import org.gwtbootstrap3.client.ui.html.Text; import cc.kune.common.shared.res.KuneIcon; import com.google.gwt.core.client.GWT; import com.google.gwt.core.client.Scheduler; import com.google.gwt.core.client.Scheduler.ScheduledCommand; import com.google.gwt.resources.client.ImageResource; import com.google.gwt.user.client.ui.HTMLPanel; import com.google.gwt.user.client.ui.HasText; import com.google.gwt.user.client.ui.Image; import com.google.gwt.user.client.ui.Widget; /** * Custom mixin for Widgets that have text and some optional icons. * * @author Sven Jacobs * @author Vicente J. Ruiz Jurado (adaptation for kune) */ public class CustomIconTextMixin<T extends ComplexWidget & HasText & HasIcon & HasIconPosition> implements HasText, HasIcon, HasIconPosition { private static final String DEF = "16px"; private Icon icon; private boolean iconBordered = false; private IconFlip iconFlip = IconFlip.NONE; private Image iconImage; private Widget iconLabel; private boolean iconLight = false; private boolean iconMuted = false; private IconPosition iconPosition = IconPosition.LEFT; private Image iconRightImage; private IconRotate iconRotate = IconRotate.NONE; private IconSize iconSize = IconSize.NONE; private boolean iconSpin = false; private IconType iconType; private ScheduledCommand renderCommand; private boolean renderScheduled; private final Text separator = new Text(" "); private final Text separator2 = new Text(" "); private HTMLPanel shortcut; private final Text text = new Text(); private final T widget; public CustomIconTextMixin(final T widget) { this.widget = widget; } private Widget createCleanIcon() { final Image icon = new Image(); icon.setUrl(GWT.getModuleBaseURL() + "clear.cache.gif"); return icon; } @Override public IconType getIcon() { return icon == null ? null : icon.getType(); } @Override public IconFlip getIconFlip() { return iconFlip; } @Override public IconPosition getIconPosition() { return iconPosition; } @Override public IconRotate getIconRotate() { return iconRotate; } @Override public IconSize getIconSize() { return iconSize; } @Override public String getText() { return text.getText(); } @Override public boolean isIconBordered() { return iconBordered; } @Override public boolean isIconLight() { return iconLight; } @Override public boolean isIconMuted() { return iconMuted; } @Override public boolean isIconSpin() { return iconSpin; } private void render() { // We defer to make sure the elements are available to manipulate their // positions if (renderCommand == null) { renderCommand = new Scheduler.ScheduledCommand() { private int addOtherIcons(final boolean hasIconImage, final boolean hasIconRightImage, final boolean hasIconLabel, int position) { if (hasIconImage) { widget.insert(iconImage, position++); } if (hasIconRightImage) { widget.insert(iconRightImage, position++); } if (hasIconLabel) { widget.insert(iconLabel, position++); } return position; } private int addOtherSeparator(final boolean hasIconType, final boolean hasIconImage, final boolean hasIconRightImage, final boolean hasIconLabel, final int position) { if (!hasIconType && (hasIconImage || hasIconRightImage || hasIconLabel)) { widget.insert(separator2, position); } return position; } @Override public void execute() { if (text.isAttached()) { text.removeFromParent(); } if (separator.isAttached()) { separator.removeFromParent(); } if (separator2.isAttached()) { separator2.removeFromParent(); } if (icon != null) { icon.removeFromParent(); } if (shortcut != null) { shortcut.removeFromParent(); } final boolean hasIconType = iconType != null; final boolean hasIconImage = iconImage != null; final boolean hasIconRightImage = iconRightImage != null; final boolean hasIconLabel = iconLabel != null; final boolean hasShortcut = shortcut != null; if (hasIconImage) { iconImage.removeFromParent(); } if (hasIconRightImage) { iconRightImage.removeFromParent(); } if (hasIconLabel) { iconLabel.removeFromParent(); } icon = new Icon(); icon.setType(iconType); icon.setSize(iconSize); icon.setFlip(iconFlip); icon.setRotate(iconRotate); icon.setMuted(iconMuted); icon.setSpin(iconSpin); icon.setBorder(iconBordered); icon.setLight(iconLight); // Since we are dealing with Icon/Text, we can insert them at the // right // position. // Helps on widgets like ButtonDropDown, where it has a caret added int position = 0; if (iconPosition == IconPosition.LEFT) { if (hasIconType) { widget.insert(icon, position++); widget.insert(separator, position); } position = addOtherIcons(hasIconImage, hasIconRightImage, hasIconLabel, position); position = addOtherSeparator(hasIconType, hasIconImage, hasIconRightImage, hasIconLabel, position); } if (text.getText() != null && text.getText().length() > 0 && !"undefined".equals(text.getText())) { widget.insert(text, position++); } if (hasShortcut) { widget.insert(shortcut, position++); } if (iconPosition == IconPosition.RIGHT) { if (hasIconType) { widget.insert(separator, position++); widget.insert(icon, position++); } position = addOtherSeparator(hasIconType, hasIconImage, hasIconRightImage, hasIconLabel, position); position = addOtherIcons(hasIconImage, hasIconRightImage, hasIconLabel, position); } renderScheduled = false; } }; } if (!renderScheduled) { // We prevent to render several times the same widget Scheduler.get().scheduleFinally(renderCommand); renderScheduled = true; } } @Override public void setIcon(final IconType iconType) { this.iconType = iconType; render(); } public void setIcon(final KuneIcon icon) { if (iconLabel == null) { iconLabel = new CustomIcon(icon.getCharacter().toString()); } iconLabel.setStyleName("k-iconfontlabel"); render(); } public void setIconBackColor(final String backgroundColor) { if (iconLabel == null) { iconLabel = createCleanIcon(); } iconLabel.getElement().getStyle().setBackgroundColor(backgroundColor); render(); } @Override public void setIconBordered(final boolean iconBordered) { this.iconBordered = iconBordered; render(); } @Override public void setIconFlip(final IconFlip iconFlip) { this.iconFlip = iconFlip; render(); } @Override public void setIconLight(final boolean iconLight) { this.iconLight = iconLight; render(); } @Override public void setIconMuted(final boolean iconMuted) { this.iconMuted = iconMuted; render(); } @Override public void setIconPosition(final IconPosition iconPosition) { this.iconPosition = iconPosition; render(); } public void setIconResource(final ImageResource icon) { if (iconImage == null) { iconImage = new Image(); } iconImage.setResource(icon); iconImage.setSize(DEF, DEF); render(); } public void setIconRightResource(final ImageResource icon) { if (iconRightImage == null) { iconRightImage = new Image(); } iconRightImage.setResource(icon); iconRightImage.setSize(DEF, DEF); render(); } @Override public void setIconRotate(final IconRotate iconRotate) { this.iconRotate = iconRotate; render(); } @Override public void setIconSize(final IconSize iconSize) { this.iconSize = iconSize; render(); } @Override public void setIconSpin(final boolean iconSpin) { this.iconSpin = iconSpin; } public void setIconStyle(final String style) { if (iconLabel == null) { iconLabel = createCleanIcon(); } iconLabel.addStyleName(style); render(); } public void setIconUrl(final String url) { if (iconImage == null) { iconImage = new Image(); } iconImage.setUrl(url); iconImage.setSize(DEF, DEF); render(); } public void setShortcut(final String shortcutHtml) { shortcut = new HTMLPanel("span", shortcutHtml); } @Override public void setText(final String text) { this.text.setText(text); render(); } }