Java tutorial
/* * SourcePane.java * * Copyright (C) 2009-12 by RStudio, Inc. * * Unless you have received this program directly from RStudio pursuant * to the terms of a commercial license agreement with RStudio, then * this program is licensed to you under the terms of version 3 of the * GNU Affero General Public License. This program is distributed WITHOUT * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT, * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details. * */ package org.rstudio.studio.client.workbench.views.source; import com.google.gwt.core.client.Scheduler; import com.google.gwt.core.client.Scheduler.ScheduledCommand; import com.google.gwt.dom.client.Style.Cursor; import com.google.gwt.dom.client.Style.Unit; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.logical.shared.BeforeSelectionHandler; import com.google.gwt.event.logical.shared.CloseEvent; import com.google.gwt.event.logical.shared.CloseHandler; import com.google.gwt.event.logical.shared.SelectionHandler; import com.google.gwt.event.shared.HandlerRegistration; import com.google.gwt.resources.client.ImageResource; import com.google.gwt.user.client.Command; import com.google.gwt.user.client.ui.*; import com.google.inject.Inject; import org.rstudio.core.client.events.*; import org.rstudio.core.client.layout.RequiresVisibilityChanged; import org.rstudio.core.client.theme.DocTabLayoutPanel; import org.rstudio.core.client.theme.res.ThemeResources; import org.rstudio.core.client.theme.res.ThemeStyles; import org.rstudio.core.client.widget.BeforeShowCallback; import org.rstudio.core.client.widget.OperationWithInput; import org.rstudio.studio.client.common.AutoGlassAttacher; import org.rstudio.studio.client.workbench.model.UnsavedChangesTarget; import org.rstudio.studio.client.workbench.ui.unsaved.UnsavedChangesDialog; import org.rstudio.studio.client.workbench.views.source.Source.Display; import java.util.ArrayList; public class SourcePane extends Composite implements Display, HasEnsureVisibleHandlers, HasEnsureHeightHandlers, RequiresResize, ProvidesResize, BeforeShowCallback, RequiresVisibilityChanged { @Inject public SourcePane() { final int UTILITY_AREA_SIZE = 74; panel_ = new LayoutPanel(); new AutoGlassAttacher(panel_); tabPanel_ = new DocTabLayoutPanel(true, 65, UTILITY_AREA_SIZE); panel_.add(tabPanel_); panel_.setWidgetTopBottom(tabPanel_, 0, Unit.PX, 0, Unit.PX); panel_.setWidgetLeftRight(tabPanel_, 0, Unit.PX, 0, Unit.PX); utilPanel_ = new HTML(); utilPanel_.setStylePrimaryName(ThemeStyles.INSTANCE.multiPodUtilityArea()); panel_.add(utilPanel_); panel_.setWidgetRightWidth(utilPanel_, 0, Unit.PX, UTILITY_AREA_SIZE, Unit.PX); panel_.setWidgetTopHeight(utilPanel_, 0, Unit.PX, 22, Unit.PX); tabOverflowPopup_ = new TabOverflowPopupPanel(); tabOverflowPopup_.addCloseHandler(new CloseHandler<PopupPanel>() { public void onClose(CloseEvent<PopupPanel> popupPanelCloseEvent) { manageChevronVisibility(); } }); chevron_ = new Image(ThemeResources.INSTANCE.chevron()); chevron_.getElement().getStyle().setCursor(Cursor.POINTER); chevron_.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { tabOverflowPopup_.showRelativeTo(chevron_); } }); panel_.add(chevron_); panel_.setWidgetTopHeight(chevron_, 8, Unit.PX, chevron_.getHeight(), Unit.PX); panel_.setWidgetRightWidth(chevron_, 52, Unit.PX, chevron_.getWidth(), Unit.PX); initWidget(panel_); } @Override protected void onLoad() { super.onLoad(); Scheduler.get().scheduleDeferred(new ScheduledCommand() { public void execute() { onResize(); } }); } public void addTab(Widget widget, ImageResource icon, String name, String tooltip, boolean switchToTab) { tabPanel_.add(widget, icon, name, tooltip); if (switchToTab) tabPanel_.selectTab(widget); } public void closeTab(Widget child, boolean interactive) { closeTab(child, interactive, null); } public void closeTab(Widget child, boolean interactive, Command onClosed) { closeTab(tabPanel_.getWidgetIndex(child), interactive, onClosed); } public void closeTab(int index, boolean interactive) { closeTab(index, interactive, null); } public void closeTab(int index, boolean interactive, Command onClosed) { if (interactive) tabPanel_.tryCloseTab(index, onClosed); else tabPanel_.closeTab(index, onClosed); } public void setDirty(Widget widget, boolean dirty) { Widget tab = tabPanel_.getTabWidget(widget); if (dirty) tab.addStyleName(ThemeStyles.INSTANCE.dirtyTab()); else tab.removeStyleName(ThemeStyles.INSTANCE.dirtyTab()); } public void ensureVisible() { fireEvent(new EnsureVisibleEvent()); } public void renameTab(Widget child, ImageResource icon, String value, String tooltip) { tabPanel_.replaceDocName(tabPanel_.getWidgetIndex(child), icon, value, tooltip); } public int getActiveTabIndex() { return tabPanel_.getSelectedIndex(); } public void selectTab(int tabIndex) { tabPanel_.selectTab(tabIndex); } public void selectTab(Widget child) { tabPanel_.selectTab(child); } public int getTabCount() { return tabPanel_.getWidgetCount(); } public HandlerRegistration addTabClosingHandler(TabClosingHandler handler) { return tabPanel_.addTabClosingHandler(handler); } public HandlerRegistration addTabCloseHandler(TabCloseHandler handler) { return tabPanel_.addTabCloseHandler(handler); } public HandlerRegistration addTabClosedHandler(TabClosedHandler handler) { return tabPanel_.addTabClosedHandler(handler); } @Override public HandlerRegistration addTabReorderHandler(TabReorderHandler handler) { return tabPanel_.addTabReorderHandler(handler); } public HandlerRegistration addSelectionHandler(SelectionHandler<Integer> handler) { return tabPanel_.addSelectionHandler(handler); } public HandlerRegistration addBeforeSelectionHandler(BeforeSelectionHandler<Integer> handler) { return tabPanel_.addBeforeSelectionHandler(handler); } public Widget asWidget() { return this; } public HandlerRegistration addEnsureVisibleHandler(EnsureVisibleHandler handler) { return addHandler(handler, EnsureVisibleEvent.TYPE); } @Override public HandlerRegistration addEnsureHeightHandler(EnsureHeightHandler handler) { return addHandler(handler, EnsureHeightEvent.TYPE); } public void onResize() { panel_.onResize(); manageChevronVisibility(); } public void manageChevronVisibility() { int tabsWidth = tabPanel_.getTabsEffectiveWidth(); setOverflowVisible(tabsWidth > getOffsetWidth() - 50); } public void showOverflowPopup() { setOverflowVisible(true); tabOverflowPopup_.showRelativeTo(chevron_); } @Override public void showUnsavedChangesDialog(String title, ArrayList<UnsavedChangesTarget> dirtyTargets, OperationWithInput<UnsavedChangesDialog.Result> saveOperation, Command onCancelled) { new UnsavedChangesDialog(title, dirtyTargets, saveOperation, onCancelled).showModal(); } private void setOverflowVisible(boolean visible) { utilPanel_.setVisible(visible); chevron_.setVisible(visible); } public void onBeforeShow() { fireEvent(new BeforeShowEvent()); } public HandlerRegistration addBeforeShowHandler(BeforeShowHandler handler) { return addHandler(handler, BeforeShowEvent.TYPE); } public void onVisibilityChanged(boolean visible) { if (getActiveTabIndex() >= 0) { Widget w = tabPanel_.getTabWidget(getActiveTabIndex()); if (w instanceof RequiresVisibilityChanged) ((RequiresVisibilityChanged) w).onVisibilityChanged(visible); } } private DocTabLayoutPanel tabPanel_; private HTML utilPanel_; private Image chevron_; private LayoutPanel panel_; private PopupPanel tabOverflowPopup_; }