Android Open Source - splott Main Activity

From Project

Back to project page splott.
License

The source code is released under:
MIT License
If you think the Android project splott listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

package com.wordsaretoys.splott;
// ww w . jav a  2 s .c  o m
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import android.widget.TextView;

import com.wordsaretoys.splott.parser.Compiler;
import com.wordsaretoys.splott.parser.SyntaxChecker;
import com.wordsaretoys.splott.parser.Vm;
import com.wordsaretoys.splott.plotter.GlView;
import com.wordsaretoys.splott.plotter.Render;

public class MainActivity extends Activity {

  // maps key buttons to generated key codes
  static int[][] keymap = {
    
    { R.id.key_0, KeyEvent.KEYCODE_0 },
    { R.id.key_1, KeyEvent.KEYCODE_1 },
    { R.id.key_2, KeyEvent.KEYCODE_2 },
    { R.id.key_3, KeyEvent.KEYCODE_3 },
    { R.id.key_4, KeyEvent.KEYCODE_4 },
    { R.id.key_5, KeyEvent.KEYCODE_5 },
    { R.id.key_6, KeyEvent.KEYCODE_6 },
    { R.id.key_7, KeyEvent.KEYCODE_7 },
    { R.id.key_8, KeyEvent.KEYCODE_8 },
    { R.id.key_9, KeyEvent.KEYCODE_9 },
    
    { R.id.key_add, KeyEvent.KEYCODE_PLUS },
    { R.id.key_sub, KeyEvent.KEYCODE_MINUS },
    { R.id.key_mul, KeyEvent.KEYCODE_STAR },
    { R.id.key_div, KeyEvent.KEYCODE_SLASH },
    { R.id.key_dpt, KeyEvent.KEYCODE_PERIOD },
    { R.id.key_lpr, KeyEvent.KEYCODE_NUMPAD_LEFT_PAREN },
    { R.id.key_rpr, KeyEvent.KEYCODE_NUMPAD_RIGHT_PAREN },
    { R.id.key_equ, KeyEvent.KEYCODE_EQUALS },

    { R.id.key_x, KeyEvent.KEYCODE_X },
    { R.id.key_y, KeyEvent.KEYCODE_Y },
    { R.id.key_z, KeyEvent.KEYCODE_Z },
    { R.id.key_t, KeyEvent.KEYCODE_T },
    
    { R.id.key_sin, KeyEvent.KEYCODE_S, KeyEvent.KEYCODE_I, KeyEvent.KEYCODE_N },
    { R.id.key_cos, KeyEvent.KEYCODE_C, KeyEvent.KEYCODE_O, KeyEvent.KEYCODE_S },
    { R.id.key_log, KeyEvent.KEYCODE_L, KeyEvent.KEYCODE_O, KeyEvent.KEYCODE_G },
    { R.id.key_exp, KeyEvent.KEYCODE_E, KeyEvent.KEYCODE_X, KeyEvent.KEYCODE_P },
    
    { R.id.key_del, KeyEvent.KEYCODE_DEL }
    
  };

  GlView glView;
  EditText source;
  ViewGroup keys;
  SyntaxChecker syntax;
  Compiler compiler;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    syntax = new SyntaxChecker();
    compiler = new Compiler();
    
    source = (EditText) findViewById(R.id.source);
    glView = (GlView) findViewById(R.id.glView);
    keys = (ViewGroup) findViewById(R.id.keys);
    
    // when source changes
    source.addTextChangedListener(new TextWatcher() {
      @Override
      public void beforeTextChanged(CharSequence s, int start, int count,  int after) {}
      @Override
      public void onTextChanged(CharSequence s, int start, int before, int count) {
        String eq = s.toString();
        int errors = syntax.parse(eq);
        source.setTextColor(errors > 0 ? Color.RED : Color.BLACK);
        if (errors == 0) {
          Vm vm = compiler.compile(eq);
          Render.surface.create(vm);
        }
      }
      @Override
      public void afterTextChanged(Editable s) {}
    });
  
    // set up button dispatch to source editor
    for (int i = 0; i < keymap.length; i++) {
      final int[] keys = keymap[i];
      // first field is the resource id of the key view
      TextView tv = (TextView) findViewById(keys[0]);
      tv.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
          // remaining fields are keycodes to send
          for (int k = 1; k < keys.length; k++) {
            source.dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keys[k]));
          }
        }
      });
    }
    
    final InputMethodManager im = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
    source.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        // prevents soft keyboard from popping up on click
        // (while preserving ability to position/select cursor)
        im.hideSoftInputFromWindow(source.getWindowToken(), 0);
        // insure our custom keyboard is shown
        keys.setVisibility(View.VISIBLE);
      }
    });
    
    glView.setOnTouchListener(new OnTouchListener() {
      @Override
      public boolean onTouch(View v, MotionEvent event) {
        // hide the custom keyboard
        keys.setVisibility(View.GONE);
        return false;
      }
    });
    
  }

}
Java Source Code List
