diff options
Diffstat (limited to 'mobileapp/src/smoots/udesign/colorpicker/ColorPickerView.java')
| -rwxr-xr-x | mobileapp/src/smoots/udesign/colorpicker/ColorPickerView.java | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/mobileapp/src/smoots/udesign/colorpicker/ColorPickerView.java b/mobileapp/src/smoots/udesign/colorpicker/ColorPickerView.java new file mode 100755 index 0000000..f2dea98 --- /dev/null +++ b/mobileapp/src/smoots/udesign/colorpicker/ColorPickerView.java @@ -0,0 +1,187 @@ +package smoots.udesign.colorpicker;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.RectF;
+import android.graphics.Shader;
+import android.graphics.SweepGradient;
+import android.view.MotionEvent;
+import android.view.View;
+
+public class ColorPickerView extends View {
+ private final Paint mPaint;
+ private final Paint mCenterPaint;
+ private final int[] mColors;
+ private final ColorPickerListener mListener;
+
+ ColorPickerView(Context c, ColorPickerListener l, int color) {
+ super(c);
+ mListener = l;
+ mColors = new int[] { 0xFFFF0000, 0xFFFF00FF, 0xFF0000FF,
+ 0xFF00FFFF, 0xFF00FF00, 0xFFFFFF00, 0xFFFF0000 };
+ Shader s = new SweepGradient(0, 0, mColors, null);
+
+ mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+ mPaint.setShader(s);
+ mPaint.setStyle(Paint.Style.STROKE);
+ mPaint.setStrokeWidth(32);
+
+ mCenterPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
+ mCenterPaint.setColor(color);
+ mCenterPaint.setStrokeWidth(5);
+ }
+
+ private boolean mTrackingCenter;
+ private boolean mHighlightCenter;
+
+ @Override
+ protected void onDraw(Canvas canvas) {
+ float r = CENTER_X - mPaint.getStrokeWidth() * 0.5f;
+
+ canvas.translate(CENTER_X, CENTER_X);
+
+ canvas.drawOval(new RectF(-r, -r, r, r), mPaint);
+ canvas.drawCircle(0, 0, CENTER_RADIUS, mCenterPaint);
+
+ if (mTrackingCenter) {
+ int c = mCenterPaint.getColor();
+ mCenterPaint.setStyle(Paint.Style.STROKE);
+
+ if (mHighlightCenter) {
+ mCenterPaint.setAlpha(0xFF);
+ } else {
+ mCenterPaint.setAlpha(0x80);
+ }
+ canvas.drawCircle(0, 0, CENTER_RADIUS
+ + mCenterPaint.getStrokeWidth(), mCenterPaint);
+
+ mCenterPaint.setStyle(Paint.Style.FILL);
+ mCenterPaint.setColor(c);
+ }
+ }
+
+ @Override
+ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+ setMeasuredDimension(CENTER_X * 2, CENTER_Y * 2);
+ }
+
+ private static final int CENTER_X = 100;
+ private static final int CENTER_Y = 100;
+ private static final int CENTER_RADIUS = 32;
+
+
+ private int ave(int s, int d, float p) {
+ return s + java.lang.Math.round(p * (d - s));
+ }
+
+ private int interpColor(int colors[], float unit) {
+ if (unit <= 0)
+ return colors[0];
+ if (unit >= 1)
+ return colors[colors.length - 1];
+
+ float p = unit * (colors.length - 1);
+ int i = (int) p;
+ p -= i;
+
+ // now p is just the fractional part [0...1) and i is the index
+ int c0 = colors[i];
+ int c1 = colors[i + 1];
+ int a = ave(Color.alpha(c0), Color.alpha(c1), p);
+ int r = ave(Color.red(c0), Color.red(c1), p);
+ int g = ave(Color.green(c0), Color.green(c1), p);
+ int b = ave(Color.blue(c0), Color.blue(c1), p);
+
+ return Color.argb(a, r, g, b);
+ }
+
+ /*
+
+ private int floatToByte(float x) {
+ int n = java.lang.Math.round(x);
+ return n;
+ }
+
+ private int pinToByte(int n) {
+ if (n < 0) {
+ n = 0;
+ } else if (n > 255) {
+ n = 255;
+ }
+ return n;
+ }
+
+ private int rotateColor(int color, float rad) {
+ float deg = rad * 180 / 3.1415927f;
+ int r = Color.red(color);
+ int g = Color.green(color);
+ int b = Color.blue(color);
+
+ ColorMatrix cm = new ColorMatrix();
+ ColorMatrix tmp = new ColorMatrix();
+
+ cm.setRGB2YUV();
+ tmp.setRotate(0, deg);
+ cm.postConcat(tmp);
+ tmp.setYUV2RGB();
+ cm.postConcat(tmp);
+
+ final float[] a = cm.getArray();
+
+ int ir = floatToByte(a[0] * r + a[1] * g + a[2] * b);
+ int ig = floatToByte(a[5] * r + a[6] * g + a[7] * b);
+ int ib = floatToByte(a[10] * r + a[11] * g + a[12] * b);
+
+ return Color.argb(Color.alpha(color), pinToByte(ir), pinToByte(ig),
+ pinToByte(ib));
+ }
+ */
+
+ private static final float PI = 3.1415926f;
+
+ @Override
+ public boolean onTouchEvent(MotionEvent event) {
+ float x = event.getX() - CENTER_X;
+ float y = event.getY() - CENTER_Y;
+ boolean inCenter = java.lang.Math.sqrt(x * x + y * y) <= CENTER_RADIUS;
+
+ switch (event.getAction()) {
+ case MotionEvent.ACTION_DOWN:
+ mTrackingCenter = inCenter;
+ if (inCenter) {
+ mHighlightCenter = true;
+ invalidate();
+ break;
+ }
+ case MotionEvent.ACTION_MOVE:
+ if (mTrackingCenter) {
+ if (mHighlightCenter != inCenter) {
+ mHighlightCenter = inCenter;
+ invalidate();
+ }
+ } else {
+ float angle = (float) java.lang.Math.atan2(y, x);
+ // need to turn angle [-PI ... PI] into unit [0....1]
+ float unit = angle / (2 * PI);
+ if (unit < 0) {
+ unit += 1;
+ }
+ mCenterPaint.setColor(interpColor(mColors, unit));
+ invalidate();
+ }
+ break;
+ case MotionEvent.ACTION_UP:
+ if (mTrackingCenter) {
+ if (inCenter) {
+ mListener.onColorChanged(mCenterPaint.getColor());
+ }
+ mTrackingCenter = false; // so we draw w/o halo
+ invalidate();
+ }
+ break;
+ }
+ return true;
+ }
+}
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