Android Open Source - geoar-app Data Source List Adapter

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The source code is released under:
Apache License
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Java Source Code

/**
 * Copyright 2012 52North Initiative for Geospatial Open Source Software GmbH
 */*from   ww w. ja  v  a2  s .c o  m*/
 * 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 org.n52.geoar;

import java.util.List;

import org.n52.geoar.ar.view.IntroController;
import org.n52.geoar.newdata.CheckList.OnCheckedChangedListener;
import org.n52.geoar.newdata.CheckList.OnItemChangedListenerWrapper;
import org.n52.geoar.newdata.DataSourceHolder;
import org.n52.geoar.newdata.DataSourceInstanceHolder;
import org.n52.geoar.newdata.InstalledPluginHolder;
import org.n52.geoar.newdata.PluginLoader;
import org.n52.geoar.newdata.Visualization;

import android.app.AlertDialog;
import android.content.Context;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

/**
 * Adapter creating the {@link DataSourceHolder} /
 * {@link DataSourceInstanceHolder} tree list. Allows to manage settings and
 * instances.
 * 
 */
public class DataSourceListAdapter extends BaseExpandableListAdapter {

  /**
   * Holder for child items 
   * 
   */
  private class DataSourceInstanceViewHolder {
    DataSourceInstanceHolder dataSourceInstance;
    ImageView imageViewSettings;
    TextView textView;
    TextView textViewDetails;
    CheckBox checkBox;
    OnCheckedChangeListener checkListener = new OnCheckedChangeListener() {
      @Override
      public void onCheckedChanged(CompoundButton buttonView,
          boolean isChecked) {
        if (dataSourceInstance.isChecked() != isChecked) {
          dataSourceInstance.setChecked(isChecked);
          notifyDataSetChanged();
          IntroController.finishTaskIfActive(9);
        }
      }
    };
    OnClickListener settingsClickListener = new OnClickListener() {
      @Override
      public void onClick(View v) {
        dataSourceInstance.createSettingsDialog(mContext);
      }
    };
    OnClickListener titleClickListener = new OnClickListener() {
      @Override
      public void onClick(View v) {
        if (dataSourceInstance.hasErrorMessage()) {
          new AlertDialog.Builder(mContext).setTitle("Error")
              .setMessage(dataSourceInstance.getErrorMessage())
              .setNeutralButton(R.string.cancel, null).show();
        }
      }
    };
    public ViewGroup layoutTools;
  }

  /**
   * Holder for group items
   * 
   */
  private class DataSourceViewHolder {
    int groupPosition;
    DataSourceHolder dataSource;
    ImageView imageViewAdd;
    TextView textView;
    CheckBox checkBox;
    ImageView imageViewGroup;
    LinearLayout layoutActions;
    OnCheckedChangeListener checkListener = new OnCheckedChangeListener() {
      @Override
      public void onCheckedChanged(CompoundButton buttonView,
          boolean isChecked) {
        if (dataSource.areAllChecked() != isChecked) {
          dataSource.setChecked(isChecked);
          // notifyDataSetChanged();
        }
      }
    };
    OnClickListener clickListener = new OnClickListener() {
      @Override
      public void onClick(View v) {
        if (!listView.isGroupExpanded(groupPosition))
          listView.expandGroup(groupPosition);
        else
          listView.collapseGroup(groupPosition);
      }
    };
    OnClickListener addClickListener = new OnClickListener() {
      @Override
      public void onClick(View v) {
        dataSource.addInstance(mContext);
        listView.expandGroup(groupPosition);
      }
    };
  }

  /**
   * Holder for add instance items
   * 
   */
  private class AddDataSourceInstanceViewHolder {
    DataSourceHolder dataSource;
    TextView textView;

    OnClickListener clickListener = new OnClickListener() {
      @Override
      public void onClick(View v) {
        dataSource.addInstance(mContext);
      }
    };
  }

  /**
   * Holder for add instance items
   * 
   */
  private class RemoveUnselectedInstancesViewHolder {
    DataSourceHolder dataSource;
    TextView textView;

    OnClickListener clickListener = new OnClickListener() {
      @Override
      public void onClick(View v) {
        // TODO dialog
        dataSource.removeUncheckedInstances();
      }
    };

  }

  private ExpandableListView listView;

  private Context mContext;
  private LayoutInflater mInflater;
  private List<DataSourceHolder> mDataSources;

  private OnCheckedChangedListener<InstalledPluginHolder> mPluginChangedListener = new OnCheckedChangedListener<InstalledPluginHolder>() {

    @Override
    public void onCheckedChanged(InstalledPluginHolder item,
        boolean newState) {
      mDataSources = PluginLoader.getDataSources();
      notifyDataSetInvalidated();
      if (newState == false) {
        for (DataSourceHolder dataSource : item.getDataSources()) {
          dataSource.getInstances().removeOnItemChangeListener(
              dataSourceItemChangedListener);
          dataSource.getInstances().removeOnCheckedChangeListener(
              dataSourceCheckedChangedListener);
        }
      } else {
        for (DataSourceHolder dataSource : item.getDataSources()) {
          dataSource.getInstances().addOnItemChangeListener(
              dataSourceItemChangedListener);
          dataSource.getInstances().addOnCheckedChangeListener(
              dataSourceCheckedChangedListener);
        }
      }
    }
  };

  private int childPadding;

  private OnItemChangedListenerWrapper<DataSourceInstanceHolder> dataSourceItemChangedListener = new OnItemChangedListenerWrapper<DataSourceInstanceHolder>() {
    @Override
    public void onItemChanged() {
      notifyDataSetChanged();
    }
  };

  private OnCheckedChangedListener<DataSourceInstanceHolder> dataSourceCheckedChangedListener = new OnCheckedChangedListener<DataSourceInstanceHolder>() {
    @Override
    public void onCheckedChanged(DataSourceInstanceHolder item,
        boolean newState) {
      notifyDataSetChanged();
      IntroController.finishTaskIfActive(R.string.intro_task_3);
    }
  };

  private Class<? extends Visualization> visualizationClass;

  public <E extends Visualization> DataSourceListAdapter(Context context,
      ExpandableListView listView,
      Class<? extends Visualization> visualizationClass) {
    this.listView = listView;
    this.mContext = context;
    this.visualizationClass = visualizationClass;
    childPadding = (int) TypedValue.applyDimension(
        TypedValue.COMPLEX_UNIT_DIP, 25, context.getResources()
            .getDisplayMetrics());
    mInflater = LayoutInflater.from(context);
    mDataSources = PluginLoader.getDataSources();
    PluginLoader.getInstalledPlugins().addOnCheckedChangeListener(
        mPluginChangedListener);
    for (DataSourceHolder dataSource : mDataSources) {
      dataSource.getInstances().addOnItemChangeListener(
          dataSourceItemChangedListener);
      dataSource.getInstances().addOnCheckedChangeListener(
          dataSourceCheckedChangedListener);
    }
    // TODO remove listener somehow
  }

  public void destroy() {
    PluginLoader.getInstalledPlugins().removeOnCheckedChangeListener(
        mPluginChangedListener);
    for (DataSourceHolder dataSource : mDataSources) {
      dataSource.getInstances().removeOnItemChangeListener(
          dataSourceItemChangedListener);
    }
  }

  @Override
  public boolean areAllItemsEnabled() {
    return true;
  }

  @Override
  public Object getChild(int groupPosition, int childPosition) {
    return null;
  }

  @Override
  public long getChildId(int groupPosition, int childPosition) {
    return childPosition;
  }

  @Override
  public int getChildrenCount(int groupPosition) {
    DataSourceHolder dataSource = mDataSources.get(groupPosition);
    if (dataSource.instanceable() && !dataSource.getInstances().isEmpty()) {
      return dataSource.getInstances().size() + 2; // Add & Remove
    } else {
      return 0;
    }
  }

  @Override
  public int getChildTypeCount() {
    return 3; // Instance & New Instance & Remove
  }

  @Override
  public int getChildType(int groupPosition, int childPosition) {
    if (childPosition >= mDataSources.get(groupPosition).getInstances()
        .size()) {
      DataSourceHolder dataSource = mDataSources.get(groupPosition);
      return (childPosition - dataSource.getInstances().size()) + 1;
    } else {
      return 0;
    }
  }

  @Override
  public View getChildView(int groupPosition, int childPosition,
      boolean isLastChild, View view, ViewGroup parent) {
    View resultView;
    DataSourceHolder dataSource = mDataSources.get(groupPosition);
    if (childPosition >= dataSource.getInstances().size()) {
      int additionalPosition = childPosition
          - dataSource.getInstances().size();
      switch (additionalPosition) {
      case 0:
        resultView = getNewDataSourceInstanceView(dataSource, view,
            parent);
        break;
      case 1:
        resultView = getRemoveUnselectedDataSourceInstancesView(
            dataSource, view, parent);
        break;
      default:
        return null;
      }
    } else {
      DataSourceInstanceHolder dataSourceInstance = dataSource
          .getInstances().get(childPosition);
      resultView = getDataSourceInstanceView(dataSourceInstance, view,
          parent);
    }
    resultView.setPadding(childPadding, 0, 0, 0);
    return resultView;
  }

  @Override
  public Object getGroup(int groupPosition) {
    return mDataSources.get(groupPosition);
  }

  @Override
  public int getGroupCount() {
    return mDataSources.size();
  }

  @Override
  public long getGroupId(int groupPosition) {
    return groupPosition;
  }

  @Override
  public int getGroupType(int groupPosition) {
    if (mDataSources.get(groupPosition).instanceable()) {
      return 0;
    } else {
      return 1;
    }
  }

  @Override
  public int getGroupTypeCount() {
    return 2; // Data Source & Instance
  }

  @Override
  public View getGroupView(int groupPosition, boolean isExpanded, View view,
      ViewGroup parent) {
    DataSourceHolder dataSource = mDataSources.get(groupPosition);

    View groupView = dataSource.instanceable() ? getDataSourceView(dataSource,
        groupPosition, isExpanded, view, parent)
        : getDataSourceInstanceView(dataSource.getInstances().get(0),
            view, parent);

    if (dataSource.instanceable()) {
//      return getDataSourceView(dataSource, groupPosition, isExpanded,
//          view, parent);
    } else {
//      return getDataSourceInstanceView(dataSource.getInstances().get(0),
//          view, parent);
    }
    groupView.postInvalidateDelayed(50);
    return groupView;
  }

  @Override
  public boolean hasStableIds() {
    return false;
  }

  @Override
  public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
  }

  @Override
  public boolean isEmpty() {
    return mDataSources.isEmpty();
  }

  private View getNewDataSourceInstanceView(DataSourceHolder dataSource,
      View view, ViewGroup parent) {
    AddDataSourceInstanceViewHolder viewHolder;

    if (view == null) {
      view = mInflater.inflate(
          R.layout.datasource_list_adddatasourceinstance_item,
          parent, false);
      viewHolder = new AddDataSourceInstanceViewHolder();
      viewHolder.textView = (TextView) view.findViewById(R.id.textView);

      viewHolder.textView.setOnClickListener(viewHolder.clickListener);

      view.setTag(viewHolder);
    } else {
      viewHolder = (AddDataSourceInstanceViewHolder) view.getTag();
    }

    viewHolder.dataSource = dataSource;
    return view;
  }

  private View getRemoveUnselectedDataSourceInstancesView(
      DataSourceHolder dataSource, View view, ViewGroup parent) {
    RemoveUnselectedInstancesViewHolder viewHolder;

    if (view == null) {
      view = mInflater
          .inflate(
              R.layout.datasource_list_removeunselecteddatasourceinstances_item,
              parent, false);
      viewHolder = new RemoveUnselectedInstancesViewHolder();

      viewHolder.textView = (TextView) view.findViewById(R.id.textView);

      viewHolder.textView.setOnClickListener(viewHolder.clickListener);

      view.setTag(viewHolder);
    } else {
      viewHolder = (RemoveUnselectedInstancesViewHolder) view.getTag();
    }

    viewHolder.textView.setEnabled(!dataSource.getInstances().allChecked());

    viewHolder.dataSource = dataSource;
    return view;
  }

  private View getDataSourceInstanceView(
      DataSourceInstanceHolder dataSourceInstance, View view,
      ViewGroup parent) {
    DataSourceInstanceViewHolder viewHolder;

    if (view == null) {
      view = mInflater.inflate(
          R.layout.datasource_list_datasourceinstance_item, parent,
          false);
      viewHolder = new DataSourceInstanceViewHolder();

      viewHolder.layoutTools = (ViewGroup) view
          .findViewById(R.id.layoutTools);

      viewHolder.imageViewSettings = (ImageView) view
          .findViewById(R.id.imageViewSettings);
      viewHolder.imageViewSettings
          .setOnClickListener(viewHolder.settingsClickListener);

      viewHolder.textView = (TextView) view.findViewById(R.id.textView);

      viewHolder.textViewDetails = (TextView) view
          .findViewById(R.id.textViewDetails);

      view.findViewById(R.id.layoutTitle).setOnClickListener(
          viewHolder.titleClickListener);

      viewHolder.checkBox = (CheckBox) view.findViewById(R.id.checkBox);

      viewHolder.checkBox
          .setOnCheckedChangeListener(viewHolder.checkListener);

      view.setTag(viewHolder);
    } else {
      viewHolder = (DataSourceInstanceViewHolder) view.getTag();
    }

    viewHolder.dataSourceInstance = dataSourceInstance;
    viewHolder.textView.setText(dataSourceInstance.getName());
    viewHolder.checkBox.setChecked(viewHolder.dataSourceInstance
        .isChecked());
    String error = dataSourceInstance.getErrorString();
    if (error != null) {
      viewHolder.textViewDetails.setVisibility(View.VISIBLE);
      viewHolder.textViewDetails.setText(error);
    } else {
      viewHolder.textViewDetails.setVisibility(View.GONE);
    }

    if (viewHolder.dataSourceInstance.getParent().getVisualizations()
        .ofType(visualizationClass).isEmpty()) {
      viewHolder.textView.setEnabled(false);
      viewHolder.checkBox.setEnabled(false);
    } else {
      viewHolder.textView.setEnabled(true);
      viewHolder.checkBox.setEnabled(true);
    }

    // Hide all settings
    boolean hasSettings = viewHolder.dataSourceInstance.hasSettings();
    viewHolder.layoutTools.setVisibility(hasSettings ? View.VISIBLE
        : View.GONE);

    return view;
  }

  private View getDataSourceView(DataSourceHolder dataSource,
      int groupPosition, boolean isExpanded, View view, ViewGroup parent) {
    final DataSourceViewHolder viewHolder;

    if (view == null) {
      view = mInflater.inflate(R.layout.datasource_list_datasource_item,
          parent, false);
      viewHolder = new DataSourceViewHolder();
      view.setOnClickListener(viewHolder.clickListener);

      viewHolder.imageViewGroup = (ImageView) view
          .findViewById(R.id.imageViewGroup);

      viewHolder.layoutActions = (LinearLayout) view
          .findViewById(R.id.layoutActions);

      viewHolder.imageViewAdd = (ImageView) view
          .findViewById(R.id.imageViewAdd);
      viewHolder.imageViewAdd
          .setOnClickListener(viewHolder.addClickListener);

      viewHolder.textView = (TextView) view.findViewById(R.id.textView);

      // viewHolder.textView.setOnClickListener(viewHolder.clickListener);

      viewHolder.checkBox = (CheckBox) view.findViewById(R.id.checkBox);

      viewHolder.checkBox
          .setOnCheckedChangeListener(viewHolder.checkListener);

      view.setTag(viewHolder);
    } else {
      viewHolder = (DataSourceViewHolder) view.getTag();
    }

    viewHolder.groupPosition = groupPosition;
    viewHolder.dataSource = dataSource;

    viewHolder.textView.setText(viewHolder.dataSource.getName());
    if (isExpanded) {
      viewHolder.imageViewGroup.getDrawable().setState(
          new int[] { android.R.attr.state_expanded });
    } else {
      viewHolder.imageViewGroup.getDrawable().setState(new int[] {});
    }

    if (viewHolder.dataSource.getInstances().isEmpty()) {
      // No Instances
      viewHolder.layoutActions.setVisibility(View.VISIBLE);
      viewHolder.imageViewGroup.setVisibility(View.GONE);
      viewHolder.checkBox.setVisibility(View.GONE);

      // if (dataSource.instanceable()) {
      // viewHolder.imageViewAdd.setVisibility(View.VISIBLE);
      // } else {
      // viewHolder.imageViewAdd.setVisibility(View.GONE);
      // }
    } else {
      viewHolder.checkBox.setChecked(viewHolder.dataSource
          .areAllChecked());
      viewHolder.layoutActions.setVisibility(View.GONE);
      viewHolder.imageViewGroup.setVisibility(View.VISIBLE);
      viewHolder.checkBox.setVisibility(View.VISIBLE);

      // viewHolder.imageViewAdd.setVisibility(View.GONE);
    }

//    IntroController.addViewToStep(9, view);

    if (viewHolder.dataSource.getVisualizations()
        .ofType(visualizationClass).isEmpty()) {
      viewHolder.textView.setEnabled(false);
      viewHolder.checkBox.setEnabled(false);
    } else {
      viewHolder.textView.setEnabled(true);
      viewHolder.checkBox.setEnabled(true);
    }

    return view;
  }
}
Java Source Code List
