Android Open Source - ThreePaneLayout Main Activity

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License

The source code is released under:

This is free and unencumbered software released into the public domain. Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a co...

Java Source Code

package com.panels.ui;
/*from  w  ww . ja  va  2  s.  c  om*/
import android.app.Activity;
import android.app.FragmentTransaction;
import android.content.res.Configuration;
import android.os.Bundle;

import com.panels.R;
import com.panels.controls.ThreePaneLayout;
import com.panels.controls.ThreePaneLayout.OnStateChangeListener;
import com.panels.controls.ThreePaneLayout.VisibilityState;

public class MainActivity extends Activity implements
  CategoriesListFragment.OnCategoriesListSizeControlListener,
  TasksListFragment.OnTasksListSizeControlListener,
  TaskDetailFragment.OnTaskDetailSizeControlListener, OnStateChangeListener {

  // Multipanel control that will contain the fragments associated with the 
  // category list, task list and task detail.
  private ThreePaneLayout mMultiPaneControl;
  
  // Fragments
  private CategoriesListFragment mCategoriesListFragment;
  private TasksListFragment mTasksListFragment;
  private TaskDetailFragment mTaskDetailFragment;

  private int mScreenOrientation;
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    // Get the initial orientation of the device
    mScreenOrientation = getResources().getConfiguration().orientation;

    mMultiPaneControl = (ThreePaneLayout) findViewById(R.id.multiPaneControl);
    
    mCategoriesListFragment = CategoriesListFragment.newInstance();
    mTasksListFragment      = TasksListFragment.newInstance();
    mTaskDetailFragment     = TaskDetailFragment.newInstance();
    
    // Add the state change observers of the ThreePaneLayout control.
    // The client fragments use the events of the OnstateChangeListener interface to 
    // update the arrows orientation that user can use to redimension the panels
    mMultiPaneControl.addStateObserver(mCategoriesListFragment);
    mMultiPaneControl.addStateObserver(mTasksListFragment);
    mMultiPaneControl.addStateObserver(mTaskDetailFragment);
    
    mMultiPaneControl.addStateObserver(this);
    
    FragmentTransaction transaction = getFragmentManager().beginTransaction();
    transaction.add(R.id.categoriesList, mCategoriesListFragment, "tag");
    transaction.add(R.id.tasksList, mTasksListFragment);
    transaction.add(R.id.taskDetail, mTaskDetailFragment);
    transaction.commit();
  }
  
  @Override
  public void onConfigurationChanged(Configuration newConfig) {
      super.onConfigurationChanged(newConfig);
      
    mScreenOrientation = getResources().getConfiguration().orientation;
    
    // When device orientationcchange notify the ThreePaneLyout control associated with the activity 
    // to update the distribution of its panels in order to improve usability
      mMultiPaneControl.deviceOrientationHasChange();
  }
  
  @Override
  public void onCategoriesListSizeControlSelected() {
  
    if (mScreenOrientation == Configuration.ORIENTATION_LANDSCAPE) {
      
      VisibilityState visibilityState = mMultiPaneControl.getVisibityState();
      
      if (visibilityState == VisibilityState.LEFT_AND_MIDDLE_VISIBLE ) {
        mMultiPaneControl.setVisibilityState(VisibilityState.LEFT_VISIBLE);
      } else if ( visibilityState == VisibilityState.LEFT_VISIBLE) {
        mMultiPaneControl.setVisibilityState(VisibilityState.LEFT_AND_MIDDLE_VISIBLE);
      }
      
    } else { // Configuration.ORIENTATION_PORTRAIT
    
      // The only possible state if this event is received while the device in 
      // portrait orientation is MIDDLE_VISIBLE
      mMultiPaneControl.setVisibilityState(VisibilityState.MIDDLE_VISIBLE);
    }
  }
  
  @Override
  public void onTasksListSizeControlSelected(boolean leftControl) {
    
    VisibilityState visibilityState = mMultiPaneControl.getVisibityState();
    
    if (leftControl) {
      
      if ( mScreenOrientation == Configuration.ORIENTATION_LANDSCAPE ) {
        
        if (visibilityState == VisibilityState.LEFT_AND_MIDDLE_VISIBLE ) {
          mMultiPaneControl.setVisibilityState(VisibilityState.MIDDLE_VISIBLE);
        } else if (visibilityState == VisibilityState.MIDDLE_VISIBLE ) {
          mMultiPaneControl.setVisibilityState(VisibilityState.LEFT_AND_MIDDLE_VISIBLE);
        } else if (visibilityState == VisibilityState.MIDDLE_AND_RIGHT_VISIBLE ) {
          mMultiPaneControl.setVisibilityState(VisibilityState.LEFT_AND_MIDDLE_VISIBLE);
        }  
        
      } else { // Configuration.ORIENTATION_PORTRAIT
        
        // The only possible state if this event is received while the device in 
        // portrait orientation is LEFT_VISIBLE
        mMultiPaneControl.setVisibilityState(VisibilityState.LEFT_VISIBLE);
      }
      
    } else {
      
      if (mScreenOrientation == Configuration.ORIENTATION_LANDSCAPE) {
        
        if (visibilityState == VisibilityState.LEFT_AND_MIDDLE_VISIBLE) {
          mMultiPaneControl.setVisibilityState(VisibilityState.MIDDLE_AND_RIGHT_VISIBLE);
        } else if (visibilityState == VisibilityState.MIDDLE_VISIBLE) {
          mMultiPaneControl.setVisibilityState(VisibilityState.MIDDLE_AND_RIGHT_VISIBLE);
        } else if (visibilityState == VisibilityState.MIDDLE_AND_RIGHT_VISIBLE) {
          mMultiPaneControl.setVisibilityState(VisibilityState.MIDDLE_VISIBLE);
        }  
        
      } else { // Configuration.ORIENTATION_PORTRAIT
      
        // The only possible state if this event is received while the device in 
        // portrait orientation is RIGHT_VISIBLE
        mMultiPaneControl.setVisibilityState(VisibilityState.RIGHT_VISIBLE);
      }
    }
  }
  
  @Override
  public void onDetailTaskSizeControlSelected() {
    
    VisibilityState visibilityState = mMultiPaneControl.getVisibityState();
    
    if (mScreenOrientation == Configuration.ORIENTATION_LANDSCAPE) {
      
      if ( visibilityState == VisibilityState.MIDDLE_AND_RIGHT_VISIBLE) {
        mMultiPaneControl.setVisibilityState(VisibilityState.RIGHT_VISIBLE);
      } else if ( visibilityState == VisibilityState.RIGHT_VISIBLE) {
        mMultiPaneControl.setVisibilityState(VisibilityState.MIDDLE_AND_RIGHT_VISIBLE);
      }  
      
    } else { // Configuration.ORIENTATION_PORTRAIT
    
      // The only possible state if this event is received while the device in 
      // portrait orientation is MIDDLE_VISIBLE
      mMultiPaneControl.setVisibilityState(VisibilityState.MIDDLE_VISIBLE); 
    }
  }
  

  @Override
  public void onBeginTransitionState(VisibilityState oldState,
      VisibilityState newState) {
  }

  @Override
  public void onNewStateVisible(VisibilityState newState) { /**/ }
}

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