functions activity added

src/main/java/org/solovyev/android/calculator/CalculatorActivity.java

@@ -332,6 +332,11 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 		calculatorModel.processDigitButtonAction(((DirectionDragButton) v).getTextMiddle());
 	}
 
+	@SuppressWarnings({"UnusedDeclaration"})
+	public void functionsButtonClickHandler(@NotNull View v) {
+		startActivity(new Intent(this, CalculatorFunctionsActivity.class));
+	}
+
 	@SuppressWarnings({"UnusedDeclaration"})
 	public void varsButtonClickHandler(@NotNull View v) {
 		startActivity(new Intent(this, CalculatorVarsActivity.class));

src/main/java/org/solovyev/android/calculator/CalculatorFunctionsActivity.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+ * For more information, please, contact se.solovyev@gmail.com
+ * or visit http://se.solovyev.org
+ */
+
+package org.solovyev.android.calculator;
+
+import android.app.ListActivity;
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.*;
+import jscl.math.function.Function;
+import org.jetbrains.annotations.NotNull;
+import org.solovyev.android.calculator.model.CalculatorEngine;
+import org.solovyev.common.utils.StringUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * User: serso
+ * Date: 10/29/11
+ * Time: 4:55 PM
+ */
+public class CalculatorFunctionsActivity extends ListActivity{
+
+	@NotNull
+	private FunctionsArrayAdapter adapter;
+
+	@Override
+	protected void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+
+		setContentView(R.layout.functions);
+
+		adapter = new FunctionsArrayAdapter(this, R.layout.var, R.id.var_text, new ArrayList<Function>(CalculatorEngine.instance.getFunctionsRegistry().getEntities()));
+		setListAdapter(adapter);
+
+		final ListView lv = getListView();
+		lv.setTextFilterEnabled(true);
+
+
+
+		lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+			public void onItemClick(final AdapterView<?> parent,
+									final View view,
+									final int position,
+									final long id) {
+
+				CalculatorModel.instance.processDigitButtonAction(((Function) parent.getItemAtPosition(position)).getName(), false);
+
+				CalculatorFunctionsActivity.this.finish();
+			}
+		});
+
+	}
+
+	private class FunctionsArrayAdapter extends ArrayAdapter<Function> {
+
+		private FunctionsArrayAdapter(Context context, int resource, int textViewResourceId, List<Function> objects) {
+			super(context, resource, textViewResourceId, objects);
+		}
+
+		@Override
+		public View getView(int position, View convertView, ViewGroup parent) {
+			final ViewGroup result = (ViewGroup) super.getView(position, convertView, parent);
+
+			final Function function = getItem(position);
+
+			if (!StringUtils.isEmpty(function.getDescription())) {
+				TextView description = (TextView) result.findViewById(R.id.var_description);
+				if (description == null) {
+					final LayoutInflater layoutInflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
+					final ViewGroup itemView = (ViewGroup) layoutInflater.inflate(R.layout.var, null);
+					description = (TextView) itemView.findViewById(R.id.var_description);
+					itemView.removeView(description);
+					result.addView(description);
+				}
+				description.setText(function.getDescription());
+			} else {
+				TextView description = (TextView) result.findViewById(R.id.var_description);
+				if (description != null) {
+					result.removeView(description);
+				}
+			}
+
+
+			return result;
+		}
+	}
+
+
+}

src/main/java/org/solovyev/android/calculator/CalculatorModel.java

@@ -239,6 +239,10 @@ public enum CalculatorModel implements CursorControl, HistoryControl<CalculatorH
 	}
 
 	public void processDigitButtonAction(@Nullable final String text) {
+		processDigitButtonAction(text, true);
+	}
+
+	public void processDigitButtonAction(@Nullable final String text, boolean delayEvaluate) {
 		//Toast.makeText(CalculatorActivity.this, text, Toast.LENGTH_SHORT).show();
 
 		if (!StringUtils.isEmpty(text)) {
@@ -268,7 +272,7 @@ public enum CalculatorModel implements CursorControl, HistoryControl<CalculatorH
 					editor.getText().insert(editor.getSelectionStart(), textToBeInserted.toString());
 					editor.setSelection(editor.getSelectionStart() + cursorPositionOffset, editor.getSelectionEnd() + cursorPositionOffset);
 				}
-			});
+			}, delayEvaluate);
 		}
 	}