platform/vcs-impl/src/com/intellij/openapi/diff/impl/dir/actions/DirDiffAction.java

/*
 * Copyright 2000-2012 JetBrains s.r.o.
 *
 * 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.intellij.openapi.diff.impl.dir.actions;

import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.ShortcutProvider;
import com.intellij.openapi.actionSystem.ToggleAction;
import com.intellij.openapi.diff.impl.dir.DirDiffTableModel;

import javax.swing.*;

/**
 * @author Konstantin Bulenkov
 */
public abstract class DirDiffAction extends ToggleAction implements ShortcutProvider {
  private final DirDiffTableModel myModel;

  protected DirDiffAction(DirDiffTableModel model, String name, Icon icon) {
    super(name, name, icon);
    myModel = model;
  }

  public DirDiffTableModel getModel() {
    return myModel;
  }

  protected abstract void updateState(boolean state);

  @Override
  public final void setSelected(AnActionEvent e, boolean state) {
    updateState(state);
    if (isReloadNeeded()) {
      if (isFullReload()) {
        getModel().reloadModel(true);
      } else {
        if (state) {
          getModel().applySettings();
        } else {
          getModel().applyRemove();
        }
      }
    }
    getModel().updateFromUI();
  }

  protected boolean isFullReload() {
    return false;
  }

  protected boolean isReloadNeeded() {
    return true;
  }

  @Override
  public void update(AnActionEvent e) {
    super.update(e);
    e.getPresentation().setEnabled(!getModel().isUpdating());
  }
}