@Override
public void afterTextChanged(Editable editable) {
if (mCurrentState != CalculatorState.GRAPHING) {
setState(CalculatorState.INPUT);
}
mEvaluator.evaluate(editable, BasicCalculator.this);
}
private void onEquals() {
String text = mFormulaEditText.getCleanText();
if (mCurrentState == CalculatorState.INPUT) {
switch (mEqualButton.getState()) {
case EQUALS:
setState(CalculatorState.EVALUATE);
mEvaluator.evaluate(text, this);
break;
case NEXT:
mFormulaEditText.next();
break;
}
} else if (mCurrentState == CalculatorState.GRAPHING) {
setState(CalculatorState.EVALUATE);
onEvaluate(text, "", INVALID_RES_ID);
}
}
protected void initialize(Bundle savedInstanceState) {
// Rebuild constants. If the user changed their locale, it won't kill the app
// but it might change a decimal point from . to ,
Constants.rebuildConstants();
mDisplayView = (DisplayOverlay) findViewById(R.id.display);
mDisplayView.setFade(findViewById(R.id.history_fade));
mDisplayForeground = (ViewGroup) findViewById(R.id.the_clear_animation);
mFormulaEditText = (CalculatorEditText) findViewById(R.id.formula);
mResultEditText = (CalculatorEditText) findViewById(R.id.result);
mPadViewPager = (CalculatorPadView) findViewById(R.id.pad_pager);
mDeleteButton = findViewById(R.id.del);
mClearButton = findViewById(R.id.clr);
mEqualButton = (EqualsImageButton) findViewById(R.id.pad_numeric).findViewById(R.id.eq);
if (mEqualButton == null || mEqualButton.getVisibility() != View.VISIBLE) {
mEqualButton = (EqualsImageButton) findViewById(R.id.pad_operator).findViewById(R.id.eq);
}
mTokenizer = new CalculatorExpressionTokenizer(this);
mEvaluator = new CalculatorExpressionEvaluator(mTokenizer);
setState(
CalculatorState.values()[
savedInstanceState.getInt(KEY_CURRENT_STATE, CalculatorState.INPUT.ordinal())]);
mFormulaEditText.setSolver(mEvaluator.getSolver());
mResultEditText.setSolver(mEvaluator.getSolver());
mFormulaEditText.setText(
mTokenizer.getLocalizedExpression(
savedInstanceState.getString(KEY_CURRENT_EXPRESSION, "")));
mFormulaEditText.addTextChangedListener(mFormulaTextWatcher);
mFormulaEditText.setOnKeyListener(mFormulaOnKeyListener);
mFormulaEditText.setOnTextSizeChangeListener(this);
mDeleteButton.setOnLongClickListener(this);
mResultEditText.setEnabled(false);
findViewById(R.id.lparen).setOnLongClickListener(this);
findViewById(R.id.rparen).setOnLongClickListener(this);
findViewById(R.id.fun_sin).setOnLongClickListener(this);
findViewById(R.id.fun_cos).setOnLongClickListener(this);
findViewById(R.id.fun_tan).setOnLongClickListener(this);
// Disable IME for this application
getWindow()
.setFlags(
WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM,
WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);
Button dot = (Button) findViewById(R.id.dec_point);
dot.setText(String.valueOf(Constants.DECIMAL_POINT));
}
@Override
public void onEvaluate(String expr, String result, int errorResourceId) {
if (mCurrentState == CalculatorState.INPUT || mCurrentState == CalculatorState.GRAPHING) {
if (result == null || Solver.equal(result, expr)) {
mResultEditText.setText(null);
} else {
mResultEditText.setText(result);
}
} else if (errorResourceId != INVALID_RES_ID) {
onError(errorResourceId);
} else if (saveHistory(expr, result, true)) {
mDisplayView.scrollToMostRecent();
onResult(result);
} else if (mCurrentState == CalculatorState.EVALUATE) {
// The current expression cannot be evaluated -> return to the input state.
setState(CalculatorState.INPUT);
}
invalidateEqualsButton();
}