Example usage for android.graphics Matrix MSCALE_Y

Introduction

In this page you can find the example usage for android.graphics Matrix MSCALE_Y.

Prototype

int MSCALE_Y

To view the source code for android.graphics Matrix MSCALE_Y.

Click Source Link

Usage

From source file:com.github.colorchief.colorchief.MainActivity.java

private boolean clickInImage(int x, int y, ImageView imageView) {

    //ImageView imageViewer = (ImageView) findViewById(R.id.imageView);

    if (imageView.getVisibility() != View.VISIBLE) {
        return false;
    }/*  ww  w  .j a  v  a2 s  . c  om*/

    int[] imageViewCoords = new int[2];
    imageView.getLocationOnScreen(imageViewCoords);

    float[] imageViewMatrix = new float[9];
    imageView.getImageMatrix().getValues(imageViewMatrix);
    float scaleX = imageViewMatrix[Matrix.MSCALE_X];
    float scaleY = imageViewMatrix[Matrix.MSCALE_Y];

    Bitmap bitmap = null;
    int bitmapWidth = 0;
    int bitmapHeight = 0;

    try {
        bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
        bitmapWidth = bitmap.getWidth();
        bitmapHeight = bitmap.getHeight();
    } catch (NullPointerException npe) {
        Log.e(TAG, "Failed to extract Bitmap from ImageView: " + npe);
    }

    //assuming Bitmap is centred in imageViewer
    int scaledBitmapWidth = Math.round(bitmapWidth * scaleX);
    int scaledBitmapHeight = Math.round(bitmapHeight * scaleY);

    int xOffsetBitmap2imageViewer = (imageView.getWidth() - scaledBitmapWidth) / 2;
    int yOffsetBitmap2imageViewer = (imageView.getHeight() - scaledBitmapHeight) / 2;

    // get total bitmap offset vs. screen origin
    int xTotalOffset = imageViewCoords[0] + xOffsetBitmap2imageViewer;
    int yTotalOffset = imageViewCoords[1] + yOffsetBitmap2imageViewer;

    if ((x >= xTotalOffset) && (x <= xTotalOffset + scaledBitmapWidth) && (y >= yTotalOffset)
            && (y <= yTotalOffset + scaledBitmapHeight)) {
        return true;
    } else {
        return false;
    }
}

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From source file:com.github.colorchief.colorchief.MainActivity.java

private int[] clickImagePixelLocation(int x, int y, ImageView imageView) {
    int[] pixelLocation = new int[2];

    //ImageView imageViewer = (ImageView) findViewById(R.id.imageView);
    //Bitmap bitmap = null;
    //Drawable displayedDrawable = null;

    int bitmapWidth;
    int bitmapHeight;

    try {/*from w w w  . j a va  2 s. c  o m*/
        //bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
        bitmapWidth = bitmapScaledOriginal.getWidth();
        bitmapHeight = bitmapScaledOriginal.getHeight();
    } catch (NullPointerException npe) {
        Log.e(TAG,
                "Failed to extract Bitmap from ImageView or " + "access width and height parameters: " + npe);
        pixelLocation[0] = pixelLocation[1] = 0;
        return pixelLocation;
    }

    float[] imageMatrixValues = new float[9];
    imageView.getImageMatrix().getValues(imageMatrixValues);
    float scaleX = imageMatrixValues[Matrix.MSCALE_X];
    float scaleY = imageMatrixValues[Matrix.MSCALE_Y];

    int[] imageViewerLoc = new int[2];
    imageView.getLocationOnScreen(imageViewerLoc);

    //assuming Bitmap is centred in imageViewer
    int xOffsetBitmap2imageViewer = (imageView.getWidth() - Math.round(bitmapWidth * scaleX)) / 2;
    int yOffsetBitmap2imageViewer = (imageView.getHeight() - Math.round(bitmapHeight * scaleY)) / 2;

    // get total bitmap offset vs. screen origin
    int xTotalOffset = imageViewerLoc[0] + xOffsetBitmap2imageViewer;
    int yTotalOffset = imageViewerLoc[1] + yOffsetBitmap2imageViewer;

    int xLocationScaledBitmap = x - xTotalOffset;
    int yLocationScaledBitmap = y - yTotalOffset;

    pixelLocation[0] = Math.round(xLocationScaledBitmap / scaleX);
    pixelLocation[1] = Math.round(yLocationScaledBitmap / scaleY);

    Log.d(TAG, "Pixel location x,y = " + Integer.toString(pixelLocation[0]) + ", "
            + Integer.toString(pixelLocation[1]));

    if (pixelLocation[0] < 0)
        pixelLocation[0] = 0;
    if (pixelLocation[0] > (bitmapWidth - 1))
        pixelLocation[0] = (bitmapWidth - 1);

    if (pixelLocation[1] < 0)
        pixelLocation[1] = 0;
    if (pixelLocation[1] > (bitmapHeight - 1))
        pixelLocation[1] = (bitmapHeight - 1);

    return pixelLocation;
}

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