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Why table layout item cann't be selected using the touch?

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Why table layout item cann't be selected using the touch?

Postby x-files » Fri Jan 11, 2008 3:52 pm

1) create scrollView
ScrollView scrollView = ...

2) create scrollViewItem
TableLayout tableItem = new TableLayout(context);
... add content

3) add item to scrollView


Why table layout item can not be selected using the touch screen? … only the navigation keys...
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Postby plusminus » Fri Jan 11, 2008 4:19 pm

Hello x-files,

do you receive the same problem without ScrollView wrapped around :?:

Within the :src: Christmas-Calendar-Tutorial, I can ensure, that the onClickListener of Views within the TableLayout is working properly!

Perhaps provide a bit of your code.

Regards,
plusminus
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Postby x-files » Fri Jan 11, 2008 4:31 pm

layout xml:
Syntax: [ Download ] [ Hide ]
Using xml Syntax Highlighting
  1.         <ScrollView id="@+id/scroll_view"
  2.  
  3.             android:layout_width="fill_parent"
  4.  
  5.         android:layout_height="wrap_content"
  6.  
  7.         android:layout_weight="1.0">
  8.  
  9.                 <LinearLayout id="@+id/linear_layout"
  10.  
  11.                 android:orientation="vertical"
  12.  
  13.                 android:layout_width="fill_parent"
  14.  
  15.                 android:layout_height="wrap_content"/>
  16.  
  17.         </ScrollView>
Parsed in 0.001 seconds, using GeSHi 1.0.8.4


Syntax: [ Download ] [ Hide ]
Using java Syntax Highlighting
  1. public class SelectOneView extends Activity {
  2.  
  3.         private final String[] ITEMS = {"One", "Two", "Three"};
  4.  
  5.         private LinearLayout linearLayout;
  6.  
  7.        
  8.  
  9.     @Override
  10.  
  11.     public void onCreate(Bundle icicle) {
  12.  
  13.         super.onCreate(icicle);
  14.  
  15.                 setContentView(R.layout.scroll_view);
  16.  
  17.                 linearLayout = (LinearLayout)findViewById(R.id.linear_layout);
  18.  
  19.                 populate(linearLayout, ITEMS);
  20.  
  21.     }
  22.  
  23.    
  24.  
  25.     private void populate(LinearLayout layout, String[] lines) {
  26.  
  27.         for(int i = 0, count = lines.length, selImgId, deselImgId; i < count; i++) {
  28.  
  29.                 //selImgId = ..
  30.  
  31.                 //deselImgId = ...
  32.  
  33.                 SelectItemView view = new SelectItemView(this, lines[i], selImgId, deselImgId);
  34.  
  35.                 view.setOnClickListener(ITEM_SELECT_LISTENER);
  36.  
  37.                 linearLayout.addView(view, new LinearLayout.LayoutParams(WC, WC));
  38.  
  39.         }
  40.  
  41.     }
  42.  
  43.  
  44.  
  45.     private final OnClickListener ITEM_SELECT_LISTENER = new OnClickListener() {
  46.  
  47.         public void onClick(View v) {
  48.  
  49.             //bussiness logic
  50.  
  51.         }
  52.  
  53.     };
  54.  
  55. }
Parsed in 0.033 seconds, using GeSHi 1.0.8.4


SelectItemView:
Syntax: [ Download ] [ Hide ]
Using java Syntax Highlighting
  1. public class SelectItemView extends TableLayout
  2.  
  3.                                                         implements OnFocusChangeListener{
  4.  
  5.         private ImageView checkedIcon;
  6.  
  7.         private int selImgId, deselImgId;
  8.  
  9.                
  10.  
  11.         public SelectItemView (Context context, String text, int selImgId, int deselImgId) {
  12.  
  13.                 super(context);
  14.  
  15.                
  16.  
  17.                 this.selImgId = selImgId;
  18.  
  19.                 this.deselImgId = deselImgId;
  20.  
  21.                
  22.  
  23.                 setFocusable(true);
  24.  
  25.                 setOrientation(HORIZONTAL);
  26.  
  27.                 setColumnStretchable(1, true);
  28.  
  29.                 setColumnShrinkable(1, true);
  30.  
  31.                 setOnFocusChangeListener(this);
  32.  
  33.                 onFocusChanged(null, false);
  34.  
  35.                
  36.  
  37.                 TextView label = new TextView(getContext());
  38.  
  39.                 label.setText(text);
  40.  
  41.                 label.setWidth(200);
  42.  
  43.                
  44.  
  45.                 checkedIcon = new ImageView(getContext());
  46.  
  47.                 checkedIcon.setImageResource(R.drawable.al_sl);
  48.  
  49.                 checkedIcon.setVisibility(INVISIBLE);
  50.  
  51.  
  52.  
  53.                 TableRow row = new TableRow(getContext());
  54.  
  55.                 row.setBaselineAligned(false);
  56.  
  57.                 row.setVerticalGravity(Gravity.CENTER_VERTICAL);
  58.  
  59.                
  60.  
  61.                 row.addView(label);
  62.  
  63.                 row.addView(checkedIcon);
  64.  
  65.                 addView(row, createParam(FP, WC));
  66.  
  67.         }
  68.  
  69.        
  70.  
  71.        
  72.  
  73.         private TableLayout.LayoutParams createParam(int w, int h){
  74.  
  75.           return new TableLayout.LayoutParams(w, h);
  76.  
  77.         }
  78.  
  79.  
  80.  
  81.         /**
  82.  
  83.          * @see OnFocusChangeListener#onFocusChanged(View, boolean)
  84.  
  85.          */
  86.  
  87.         public void onFocusChanged(View view, boolean focus) {
  88.  
  89.         if (focus) {
  90.  
  91.                 setBackground(selImgId);
  92.  
  93.         } else {
  94.  
  95.                 setBackground(deselImgId);
  96.  
  97.         }
  98.  
  99.         }
  100.  
  101.        
  102.  
  103. }
Parsed in 0.036 seconds, using GeSHi 1.0.8.4
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Postby plusminus » Fri Jan 11, 2008 5:57 pm

Hello x-files,

I tried various possibilities and OnClickListeners on every single View you produce, but no one :!: gets called when hitting the specific view with the mouse.

:idea: Only if you use the Button-Class :!:

So this one line makes it "work". Unfortunately a dirty workaround :!:
Syntax: [ Download ] [ Hide ]
Using java Syntax Highlighting
  1. Button label = new Button(context);
Parsed in 0.033 seconds, using GeSHi 1.0.8.4


btw: You can make the Button appear not "as a Button", but as you can see in the :src: Christmas-Calendar-Tutorial also transparent and stuff.

How this helped you at least a bit...

Regards,
plusminus
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Postby x-files » Fri Jan 11, 2008 10:36 pm

Thanks you for investigation!
But i need to add item to scrolView where item consist of label and icon.
Label should be left aligned.
Icon should be right aligned.
Therefore i used tableLayout.

In other words if scrollView item contain diferent view then it's difficult layout they with help of button.
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Postby plusminus » Fri Jan 11, 2008 11:04 pm

Hello x-files,

Did you check the :src: IconifiedList-Tutorial :?:
The List-Entries there are clickable with the mouse
It contains a IconifiedTextView which itself consists of two more Views, ImageView and a TextView. Also Adapter (custom created IconifiedTextListAdapter).

Putting it into a ScrollView should work too.

So I assume it would fit your needs (with some customization) :?: :!: :?:

Regards,
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Postby x-files » Sat Jan 12, 2008 1:33 am

Hello, plusminus.

>>>Also Adapter (custom created IconifiedTextListAdapter).

>>>Putting it into a ScrollView should work too.

ScrollView don't use item Adapter approach.
How can i put ItemAdapter in ScrollView?

Thanks!
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Postby plusminus » Sat Jan 12, 2008 1:52 am

Hello x-files,

I've not yet used ScrollView, but I was assuming it would be like the JScrollPane from Swing, where you can put child-Views into it.

As it extends FrameLayout it is probably capable of doing the same (untested).

Regards,
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Postby x-files » Sat Jan 12, 2008 8:58 am

Hello, plusminus.


Yes, I can add child-Views into scrollView. But the problem is that if the child-View isn't a button then i cann't select it with mouse.

Yes, you are right, this problem solved in listView. But I cann't use ListView because this one to prevent to change appearance of selection cursor. Please, see image snapshot in attachment.
Attachments
imgs.zip
ListView and ScrollView
(16.26 KiB) Downloaded 126 times
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Postby plusminus » Mon Jan 14, 2008 11:58 pm

Hello x-files,

the "wrong" variant looks pretty strange, because the selection-bar is behind! the actual list.
This looks like an API-Bug or like a Bug in your code...

Please provide the important lines, so we can have a look.

Regards,
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Postby x-files » Tue Jan 15, 2008 12:35 pm

I found workarround

need overridde TableLayoyt#onMotionEvent

Syntax: [ Download ] [ Hide ]
Using java Syntax Highlighting
  1. public boolean onMotionEvent(MotionEvent event) {
  2.  
  3.                 boolean res = super.onMotionEvent(event);
  4.  
  5.                 if(event.getAction() == MotionEvent.ACTION_DOWN) {
  6.  
  7.                     performClick();
  8.  
  9.                 }      
  10.  
  11.                 return res;
  12.  
  13.         }
Parsed in 0.036 seconds, using GeSHi 1.0.8.4
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