Add "select/deselect all" checkbox (#89)

* Added checkbox at the beginning of EntryHeader
* Added 'de-select all' checkbox behaviour
* Added a new View in test-app to test new behaviour

src/com/avast/android/butterknifezelezny/form/Entry.java

@@ -1,6 +1,7 @@
 package com.avast.android.butterknifezelezny.form;
 
 
+import com.avast.android.butterknifezelezny.iface.OnCheckBoxStateChangedListener;
 import com.avast.android.butterknifezelezny.model.Element;
 
 import javax.swing.*;
@@ -16,6 +17,7 @@ public class Entry extends JPanel {
     protected EntryList mParent;
     protected Element mElement;
     protected ArrayList<String> mGeneratedIDs;
+    protected OnCheckBoxStateChangedListener mListener;
     // ui
     protected JCheckBox mCheck;
     protected JLabel mType;
@@ -25,6 +27,14 @@ public class Entry extends JPanel {
     protected Color mNameDefaultColor;
     protected Color mNameErrorColor = new Color(0x880000);
 
+    public JCheckBox getCheck() {
+        return mCheck;
+    }
+
+    public void setListener(final OnCheckBoxStateChangedListener onStateChangedListener) {
+        this.mListener = onStateChangedListener;
+    }
+
     public Entry(EntryList parent, Element element, ArrayList<String> ids) {
         mElement = element;
         mParent = parent;
@@ -103,6 +113,10 @@ private void checkState() {
             mID.setEnabled(false);
             mName.setEnabled(false);
         }
+
+        if (mListener != null) {
+            mListener.changeState(mCheck.isSelected());
+        }
     }
 
     // classes

src/com/avast/android/butterknifezelezny/form/EntryHeader.java

@@ -1,16 +1,31 @@
 package com.avast.android.butterknifezelezny.form;
 
+import com.avast.android.butterknifezelezny.iface.OnCheckBoxStateChangedListener;
+
 import javax.swing.*;
 import java.awt.*;
+import java.awt.event.ItemEvent;
+import java.awt.event.ItemListener;
 
 public class EntryHeader extends JPanel {
 
+    protected JCheckBox mAllCheck;
     protected JLabel mType;
     protected JLabel mID;
     protected JLabel mEvent;
     protected JLabel mName;
+    protected OnCheckBoxStateChangedListener mAllListener;
+
+    public void setAllListener(final OnCheckBoxStateChangedListener onStateChangedListener) {
+        this.mAllListener = onStateChangedListener;
+    }
 
     public EntryHeader() {
+        mAllCheck = new JCheckBox();
+        mAllCheck.setPreferredSize(new Dimension(40, 26));
+        mAllCheck.setSelected(false);
+        mAllCheck.addItemListener(new AllCheckListener());
+
         mType = new JLabel("Element");
         mType.setPreferredSize(new Dimension(100, 26));
         mType.setFont(new Font(mType.getFont().getFontName(), Font.BOLD, mType.getFont().getSize()));
@@ -28,7 +43,9 @@ public EntryHeader() {
         mName.setFont(new Font(mName.getFont().getFontName(), Font.BOLD, mName.getFont().getSize()));
 
         setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
-        add(Box.createRigidArea(new Dimension(52, 0)));
+        add(Box.createRigidArea(new Dimension(1, 0)));
+        add(mAllCheck);
+        add(Box.createRigidArea(new Dimension(11, 0)));
         add(mType);
         add(Box.createRigidArea(new Dimension(12, 0)));
         add(mID);
@@ -38,4 +55,19 @@ public EntryHeader() {
         add(mName);
         add(Box.createHorizontalGlue());
     }
+
+    public JCheckBox getAllCheck() {
+        return mAllCheck;
+    }
+
+    // classes
+
+    private class AllCheckListener implements ItemListener {
+        @Override
+        public void itemStateChanged(ItemEvent itemEvent) {
+            if (mAllListener != null) {
+                mAllListener.changeState(itemEvent.getStateChange() == ItemEvent.SELECTED);
+            }
+        }
+    }
 }

src/com/avast/android/butterknifezelezny/form/EntryList.java

@@ -2,6 +2,7 @@
 
 import com.avast.android.butterknifezelezny.iface.ICancelListener;
 import com.avast.android.butterknifezelezny.iface.IConfirmListener;
+import com.avast.android.butterknifezelezny.iface.OnCheckBoxStateChangedListener;
 import com.avast.android.butterknifezelezny.model.Element;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.project.Project;
@@ -32,6 +33,32 @@ public class EntryList extends JPanel {
     protected JLabel mHolderLabel;
     protected JButton mConfirm;
     protected JButton mCancel;
+    protected EntryHeader mEntryHeader;
+
+    private OnCheckBoxStateChangedListener allCheckListener = new OnCheckBoxStateChangedListener() {
+        @Override
+        public void changeState(boolean checked) {
+            for (final Entry entry : mEntries) {
+                entry.setListener(null);
+                entry.getCheck().setSelected(checked);
+                entry.setListener(singleCheckListener);
+            }
+        }
+    };
+
+    private OnCheckBoxStateChangedListener singleCheckListener = new OnCheckBoxStateChangedListener() {
+        @Override
+        public void changeState(boolean checked) {
+            boolean result = true;
+            for (Entry entry : mEntries) {
+                result &= entry.getCheck().isSelected();
+            }
+
+            mEntryHeader.setAllListener(null);
+            mEntryHeader.getAllCheck().setSelected(result);
+            mEntryHeader.setAllListener(allCheckListener);
+        }
+    };
 
     public EntryList(Project project, Editor editor, ArrayList<Element> elements, ArrayList<String> ids, boolean createHolder, IConfirmListener confirmListener, ICancelListener cancelListener) {
         mProject = project;
@@ -57,16 +84,19 @@ protected void addInjections() {
         JPanel contentPanel = new JPanel();
         contentPanel.setLayout(new BoxLayout(contentPanel, BoxLayout.PAGE_AXIS));
         contentPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
-        contentPanel.add(new EntryHeader());
+        mEntryHeader = new EntryHeader();
+        contentPanel.add(mEntryHeader);
         contentPanel.add(Box.createRigidArea(new Dimension(0, 5)));
 
         JPanel injectionsPanel = new JPanel();
         injectionsPanel.setLayout(new BoxLayout(injectionsPanel, BoxLayout.PAGE_AXIS));
         injectionsPanel.add(Box.createRigidArea(new Dimension(0, 5)));
 
         int cnt = 0;
+        boolean selectAllCheck = true;
         for (Element element : mElements) {
             Entry entry = new Entry(this, element, mGeneratedIDs);
+            entry.setListener(singleCheckListener);
 
             if (cnt > 0) {
                 injectionsPanel.add(Box.createRigidArea(new Dimension(0, 5)));
@@ -75,7 +105,11 @@ protected void addInjections() {
             cnt++;
 
             mEntries.add(entry);
+
+            selectAllCheck &= entry.getCheck().isSelected();
         }
+        mEntryHeader.getAllCheck().setSelected(selectAllCheck);
+        mEntryHeader.setAllListener(allCheckListener);
         injectionsPanel.add(Box.createVerticalGlue());
         injectionsPanel.add(Box.createRigidArea(new Dimension(0, 5)));
 

src/com/avast/android/butterknifezelezny/iface/OnCheckBoxStateChangedListener.java

@@ -0,0 +1,5 @@
+package com.avast.android.butterknifezelezny.iface;
+
+public interface OnCheckBoxStateChangedListener {
+    void changeState(boolean checked);
+}

test-app/app/src/main/res/layout/activity_main.xml

@@ -4,4 +4,10 @@
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              tools:context=".MainActivity"
-             tools:ignore="MergeRootFrame"/>
+             tools:ignore="MergeRootFrame">
+
+    <TextView android:layout_width="wrap_content"
+              android:layout_height="wrap_content"
+              android:id="@+id/main_activity_textview"/>
+
+</FrameLayout>