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Added rotation logic within widgets ImageView class.

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This commit is contained in:
Nedyalko Nikolov
2016-09-28 11:45:58 +03:00
parent b85806a8b0
commit 810d19e7f6
1 changed files with 76 additions and 1 deletions
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77
android/widgets/src/main/java/org/nativescript/widgets/ImageView.java
View File

@@ -13,14 +13,27 @@ import android.util.Log;
*
*/
public class ImageView extends android.widget.ImageView {
private static final double EPSILON = 1E-05;
private Path path = new Path();
private RectF rect = new RectF();
private double scaleW = 1;
private double scaleH = 1;
private float rotationAngle;
public float getRotationAngle() {
return rotationAngle;
}
public void setRotationAngle(float rotationAngle) {
this.rotationAngle = rotationAngle;
}
public ImageView(Context context) {
super(context);
this.mMatrix = new Matrix();
this.setScaleType(ScaleType.FIT_CENTER);
}
@@ -118,6 +131,15 @@ public class ImageView extends android.widget.ImageView {
}
}
private Matrix mMatrix;
private Bitmap pBitmap;
@Override
public void setImageBitmap(Bitmap bm) {
super.setImageBitmap(bm);
this.pBitmap = bm;
}
@Override
protected void onDraw(Canvas canvas) {
BorderDrawable background = this.getBackground() instanceof BorderDrawable ? (BorderDrawable)this.getBackground() : null;
@@ -143,6 +165,59 @@ public class ImageView extends android.widget.ImageView {
canvas.clipPath(this.path);
}
super.onDraw(canvas);
float rotationDegree = this.getRotationAngle();
if (Math.abs(rotationDegree) > ImageView.EPSILON && Math.abs((rotationDegree % 90) - 0.0) < ImageView.EPSILON) {
ScaleType scaleType = this.getScaleType();
float viewWidth = this.getWidth() - (2 * roundedBorderWidth);
float viewHeight = this.getHeight() - (2 * roundedBorderWidth);
float bitmapWidth = (float) pBitmap.getWidth();
float bitmapHeight = (float) pBitmap.getHeight();
float scaleX;
float scaleY;
float decision = (rotationDegree / 90) % 2;
if (Math.abs(Math.floor(decision) - 0) < ImageView.EPSILON) {
scaleX = viewWidth / bitmapWidth;
scaleY = viewHeight / bitmapHeight;
} else {
scaleX = viewHeight / bitmapWidth;
scaleY = viewWidth / bitmapHeight;
}
float scale = 1.0f;
if (scaleType == ScaleType.FIT_CENTER || scaleType == ScaleType.MATRIX) {
scale = (scaleX < scaleY) ? scaleX : scaleY;
}
else if (scaleType == ScaleType.CENTER_CROP) {
scale = (scaleX < scaleY) ? scaleY : scaleX;
}
Matrix matrix = this.mMatrix;
matrix.reset();
if (scaleType == ScaleType.CENTER_CROP || scaleType == ScaleType.FIT_CENTER || scaleType == ScaleType.MATRIX) {
matrix.postScale(scale, scale);
matrix.postTranslate(-(bitmapWidth * scale) / 2, -(bitmapHeight * scale) / 2);
}
else if (scaleType == ScaleType.FIT_XY) {
matrix.postScale(scaleX, scaleY);
matrix.postTranslate(-((bitmapWidth * scaleX) + roundedBorderWidth) / 2, -((bitmapHeight * scaleY) + roundedBorderWidth) / 2);
}
matrix.postRotate(rotationDegree);
matrix.postTranslate(viewWidth / 2 + roundedBorderWidth, viewHeight / 2 + roundedBorderWidth);
canvas.drawBitmap(this.pBitmap, matrix, null);
}
else {
super.onDraw(canvas);
}
if (background != null) {
background.draw(canvas);
}
}
}