Android Open Source - graph-android Input Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

package lorian.graph.android;
// w  w w .  j a  v  a2  s  .c  o m
import java.util.ArrayList;
import java.util.List;

import yuku.ambilwarna.AmbilWarnaDialog;
import yuku.ambilwarna.AmbilWarnaDialog.OnAmbilWarnaListener;

import lorian.graph.android.opengl.GraphRenderer;

import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;

public class InputActivity extends Activity  {

  private ListView list;
  private InputAdapter inputAdapter;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_input);
    setupActionBar();
    
    list = (ListView) findViewById(R.id.input_list);
    list.setItemsCanFocus(true);
    inputAdapter = new InputAdapter();
    list.setAdapter(inputAdapter);
  
  }

  @SuppressLint("NewApi")
  private void setupActionBar() {
    if (android.os.Build.VERSION.SDK_INT >= 11)
      getActionBar().setDisplayHomeAsUpEnabled(true);
    
  }
   
  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    return false;
  }

  @Override
  public void finish()
  {
    /*
    int i=0;
    for(ListItem l: inputAdapter.items)
    {
      GraphActivity.itemTexts[i] = l.caption;
      i++;
    }
    */
    super.finish();
  }
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case android.R.id.home:
      
      this.finish();
      return true;
    }
    return super.onOptionsItemSelected(item);
  }
  
  class InputAdapter extends BaseAdapter 
  {

    private LayoutInflater inflater;
    public List<ListItem> items = new ArrayList<ListItem>();
    private boolean colorPickerOn = false;
    public InputAdapter()
    {
      inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
      for(int i=0;i<GraphActivity.MaxFunctions;i++)
      {
        ListItem listItem = new ListItem();
        listItem.caption = GraphActivity.itemTexts[i];
        items.add(listItem);
      }
      notifyDataSetChanged();
    }
    
    @Override
    public int getCount() {
      return items.size();
    }
    
    @Override
    public Object getItem(int position) {
      return position;
    }

    @Override 
    public long getItemId(int position)
    { 
      return position;
    }
    
    @Override 
    public View getView(final int position, View convertView, ViewGroup parent) {
      ViewHolder holder;
      if(convertView == null)
      {
        holder = new ViewHolder();
        convertView = inflater.inflate(R.layout.input_item, null);
        holder.caption = (EditText) convertView.findViewById(R.id.input_item_caption);
         final TextView label = (TextView) convertView.findViewById(R.id.input_item_label);
        if(position+1 < 10)
          label.setText(String.format(getResources().getString(R.string.y_equals_format), position+1) + "  ");
        else
          label.setText(String.format(getResources().getString(R.string.y_equals_format), position+1));
        final int color = GraphActivity.functionColors[position].toAndroidRGB();
        label.setBackgroundColor(color);
        label.setOnTouchListener(new OnTouchListener() {
          
          @Override
          public boolean onTouch(View v, MotionEvent event) {
            if(!colorPickerOn)
            {
              showColorPicker(color, label, position);
              return true;
            }
            else
              return false;
            
          }
        });
        
        convertView.setTag(holder);
            
      }
      else 
      {
         holder = (ViewHolder) convertView.getTag();
            }
          holder.caption.setText(items.get(position).caption);
        holder.caption.setId(position);
         
              //we need to update adapter once we finish with editing
              holder.caption.setOnFocusChangeListener(new OnFocusChangeListener() {
                  public void onFocusChange(View v, boolean hasFocus) {
                      if (!hasFocus){
                         final int position = v.getId();
                          final EditText Caption = (EditText) v;
                          items.get(position).caption = Caption.getText().toString();
                      }
                  }
              });
              holder.caption.addTextChangedListener(new TextWatcher() {

          @Override
          public void afterTextChanged(Editable e) {
            GraphActivity.itemTexts[position] = e.toString();
            GraphRenderer.notifyFunctionsChanged();
            
          }

          @Override
          public void beforeTextChanged(CharSequence arg0, int arg1,
              int arg2, int arg3) {
            
          }
          @Override
          public void onTextChanged(CharSequence arg0, int arg1,
              int arg2, int arg3) {
            
            
          }
              });
              return convertView;
    }
  
     void showColorPicker(final int initialColor, final TextView label, final int index)
    {
      
      AmbilWarnaDialog dialog = new AmbilWarnaDialog(InputActivity.this, initialColor, new OnAmbilWarnaListener() {
        
        @Override
        public void onOk(AmbilWarnaDialog dialog, int color) {
          label.setBackgroundColor(color);
          GraphActivity.functionColors[index] = lorian.graph.android.opengl.Color.fromAndroidRGB(color);
          GraphRenderer.notifyFunctionColorsChanged();
          colorPickerOn = false;
        }
        
        @Override
        public void onCancel(AmbilWarnaDialog dialog) {
          colorPickerOn = false;
        }
      });
      
      dialog.show();
      colorPickerOn = true;
    }
    
  }
    class ViewHolder {
          EditText caption;
      }
   
      class ListItem {
          String caption;
      }

  
}

Java Source Code List

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