Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Based on your question, you want to overlay a "pinch listening" view that draws an oval shape based on the pinch. I made some poorly-tested code for this purpose, adapt it as you need:</p> <p>MainLayout:</p> <pre><code>&lt;FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" &gt; &lt;!-- Replace the ImageView with your MapView or whatever you are overlaying with the oval shape --&gt; &lt;ImageView android:layout_width="match_parent" android:layout_height="match_parent" android:src="#F00" /&gt; &lt;com.example.testapp.CircleTouchView android:id="@+id/circle_drawer_view" android:layout_width="match_parent" android:layout_height="match_parent" /&gt; &lt;/FrameLayout&gt; </code></pre> <p>CircleTouchView:</p> <pre><code>public class CircleTouchView extends View { private static final int MODE_PINCH = 0; private static final int MODE_DONT_CARE = 1; ShapeDrawable mCircleDrawable; int mTouchMode = MODE_DONT_CARE; public CircleTouchView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); mCircleDrawable = new ShapeDrawable(new OvalShape()); mCircleDrawable.getPaint().setColor(0x66FFFFFF); } public CircleTouchView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public CircleTouchView(Context context) { this(context, null, 0); } @Override public boolean onTouchEvent(MotionEvent event) { switch (event.getActionMasked()) { case MotionEvent.ACTION_DOWN: mCircleDrawable.setBounds(0, 0, 0, 0); invalidate(); break; case MotionEvent.ACTION_POINTER_DOWN: prepareCircleDrawing(event); break; case MotionEvent.ACTION_MOVE: if (mTouchMode == MODE_PINCH) { prepareCircleDrawing(event); } break; case MotionEvent.ACTION_POINTER_UP: if (event.getActionIndex() &lt;= 1) { mTouchMode = MODE_DONT_CARE; } break; default: super.onTouchEvent(event); } return true; } private void prepareCircleDrawing(MotionEvent event) { int top, right, bottom, left; int index = event.getActionIndex(); if (index &gt; 1) { return; } mTouchMode = MODE_PINCH; if (event.getX(0) &lt; event.getX(1)) { left = (int) event.getX(0); right = (int) event.getX(1); } else { left = (int) event.getX(1); right = (int) event.getX(0); } if (event.getY(0) &lt; event.getY(1)) { top = (int) event.getY(0); bottom = (int) event.getY(1); } else { top = (int) event.getY(1); bottom = (int) event.getY(0); } mCircleDrawable.setBounds(left, top, right, bottom); invalidate(); } @Override protected void onDraw(Canvas canvas) { mCircleDrawable.draw(canvas); } } </code></pre> <p>If you want a perfect circle instead of an oval shape, change the prepareCircleDrawing() method so that it takes the smallest values for X and Y between event 0 and 1.</p> <p>Edit: you can add the snippet below before calling <code>mCircleDrawable.setBounds(left, top, right, bottom);</code> to draw a perfect circle. There are other ways for drawing circles, it depends on how you want it to behave.</p> <pre><code>int height = bottom - top; int width = right - left; if (height &gt; width) { int delta = height - width; top += delta / 2; bottom -= delta / 2; } else { int delta = width - height; left += delta / 2; right -= delta / 2; } </code></pre> <p>Hope I made myself clear, regards.</p>
    singulars
    1. This table or related slice is empty.
    1. POandroid - draw resizable circle on google map
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USVítor de Almeida
    1. USVítor de Almeida
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POandroid - draw resizable circle on google map
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COthank you so much, thats exactly what i was trying to implement except for the circle part. could you please explain a bit more on how to make it a perfect circle?
      singulars
      1. PO
      1. USuser2717267
    2. COA little code snippet was added, please check if it fits your needs.
      singulars
      1. PO
      1. USVítor de Almeida
    3. COit's indeed drawing a circle , however the former implementation was a bit more comfortable to use than the new one. i'll work on it more. again, thank you very much for your help.
      singulars
      1. PO
      1. USuser2717267
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload