| public drawRect ( android arg0, android arg1 ) : void | ||
| arg0 | android | |
| arg1 | android | |
| return | void | |
protected override void onDraw (Canvas canvas)
{
canvas.drawColor (unchecked((int)0xFFDDDDDD));
Paint paint = new Paint ();
paint.setAntiAlias (true);
paint.setStyle (Paint.Style.STROKE);
paint.setStrokeWidth (3);
paint.setStyle (Paint.Style.FILL);
RectF r = new RectF ();
float t, x, y;
t = GetAnimScalar (25, 500);
canvas.translate (320, 240);
for (int i = 0; i < 35; i++) {
paint.setColor (unchecked((int)0xFFF00FF0 - i * 0x04000000));
double step = Math.PI / (55 - i);
double angle = t * step;
x = (20 + i * 5) * (float)Math.Sin (angle);
y = (20 + i * 5) * (float)Math.Cos (angle);
r.set (x, y, x + 10, y + 10);
canvas.drawRect (r, paint);
}
}
static void drawCentered (Canvas c, Rect r, Paint p)
{
float inset = p.getStrokeWidth () * 0.5f;
if (inset == 0) { // catch hairlines
inset = 0.5f;
}
c.drawRect (r.left + inset, r.top + inset,
r.right - inset, r.bottom - inset, p);
}
// create a bitmap with a rect, used for the "src" image
static Bitmap makeSrc (int w, int h)
{
Bitmap bm = Bitmap.createBitmap (w, h, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas (bm);
Paint p = new Paint (Paint.ANTI_ALIAS_FLAG);
p.setColor (unchecked((int)0xFF66AAFF));
c.drawRect (w / 3, h / 3, w * 19 / 20, h * 19 / 20, p);
return bm;
}
protected override void onDraw (Canvas canvas)
{
Console.WriteLine ("DRAW: {0} {1}", canvas.getWidth (), canvas.getHeight ());
RectF r = new RectF (0, 0, canvas.getWidth (), canvas.getHeight ());
Paint paint = new Paint ();
using (Shader shader = make_grad (canvas.getWidth(), canvas.getHeight()))
paint.setShader (shader);
canvas.drawRect (r, paint);
}
static void test_alphagradients (Canvas canvas)
{
canvas.translate (20, 10);
RectF r = new RectF (10, 10, 410, 30);
Paint p = new Paint (), p2 = new Paint ();
p2.setStyle (Paint.Style.STROKE);
using (Shader shader = setgrad (r, 0xFF00FF00, 0x0000FF00))
p.setShader (shader);
canvas.drawRect (r, p);
canvas.drawRect (r, p2);
r.offset (0, r.height () + 4);
using (Shader shader = setgrad(r, 0xFF00FF00, 0x00000000))
p.setShader (shader);
canvas.drawRect (r, p);
canvas.drawRect (r, p2);
r.offset (0, r.height () + 4);
using (Shader shader = setgrad(r, 0xFF00FF00, 0x00FF0000))
p.setShader (shader);
canvas.drawRect (r, p);
canvas.drawRect (r, p2);
}
void drawFit (Canvas canvas, int index, Matrix.ScaleToFit stf)
{
canvas.save ();
setSrcR (index);
mMatrix.setRectToRect (mSrcR, mDstR, stf);
canvas.concat (mMatrix);
drawSrcR (canvas, index);
canvas.restore ();
canvas.drawRect (mDstR, mHairPaint);
}
protected override void onDraw (Canvas canvas)
{
canvas.drawColor (unchecked((int)0xFFDDDDDD));
Paint paint = new Paint ();
paint.setAntiAlias (true);
paint.setStyle (Paint.Style.STROKE);
paint.setStrokeWidth (3);
paint.setStyle (Paint.Style.FILL);
RectF r = new RectF (10, 10, 110, 110);
for (int i = 0; i < 256; ++i) {
canvas.translate (1, 1);
paint.setColor ((int)(0xFF000000 + i * 0x00010000));
canvas.drawRect (r, paint);
}
}
void drawRgn (Canvas canvas, int color, String str, Region.Op op)
{
if (str != null) {
mPaint.setColor (Color.BLACK);
canvas.drawText (str, 80, 24, mPaint);
}
Region rgn = new Region ();
rgn.set (mRect1);
rgn.op (mRect2, op);
mPaint.setColor (color);
RegionIterator iter = new RegionIterator (rgn);
Rect r = new Rect ();
canvas.translate (0, 30);
mPaint.setColor (color);
while (iter.next(r)) {
canvas.drawRect (r, mPaint);
}
drawOriginalRects (canvas, 0x80);
}
void doDraw (Canvas canvas, float[] src, float[] dst)
{
canvas.save ();
mMatrix.setPolyToPoly (src, 0, dst, 0, src.Length >> 1);
canvas.concat (mMatrix);
mPaint.setColor (Color.GRAY);
mPaint.setStyle (Paint.Style.STROKE);
canvas.drawRect (0, 0, 64, 64, mPaint);
canvas.drawLine (0, 0, 64, 64, mPaint);
canvas.drawLine (0, 64, 64, 0, mPaint);
mPaint.setColor (Color.RED);
mPaint.setStyle (Paint.Style.FILL);
// how to draw the text center on our square
// centering in X is easy... use alignment (and X at midpoint)
float x = 64 / 2;
// centering in Y, we need to measure ascent/descent first
float y = 64 / 2 - (mFontMetrics.ascent + mFontMetrics.descent) / 2;
canvas.drawText (src.Length / 2 + "", x, y, mPaint);
canvas.restore ();
}
void drawArcs (Canvas canvas, RectF oval, bool useCenter, Paint paint)
{
canvas.drawRect (oval, mFramePaint);
canvas.drawArc (oval, mStart, mSweep, useCenter, paint);
}
protected override void onDraw (Canvas canvas)
{
canvas.drawColor (unchecked((int)0xFFDDDDDD));
test_alphagradients (canvas);
RectF r = new RectF (0, 0, 100, 100);
Paint paint = new Paint ();
paint.setDither (true);
canvas.save ();
canvas.translate (20, 100);
Shader.TileMode[] modes = {
Shader.TileMode.CLAMP, Shader.TileMode.MIRROR, Shader.TileMode.CLAMP
};
foreach (Shader.TileMode tile in modes) {
canvas.save ();
foreach (GradData data in Grads) {
canvas.save ();
foreach (GradMaker maker in GradMakers) {
using (Shader shader = maker(r, data, tile))
paint.setShader (shader);
canvas.drawRect (r, paint);
canvas.translate (0, 120);
}
canvas.restore ();
canvas.translate (120, 0);
}
canvas.translate (Grads.Length * 120, 0);
}
canvas.restore ();
canvas.translate (0, 370);
}
protected override void onDraw (Canvas canvas)
{
canvas.drawColor (Color.WHITE);
Paint labelP = new Paint (Paint.ANTI_ALIAS_FLAG);
labelP.setTextAlign (Paint.Align.CENTER);
Paint paint = new Paint ();
paint.setFilterBitmap (false);
canvas.translate (15, 35);
int x = 0;
int y = 0;
for (int i = 0; i < sModes.Length; i++) {
// draw the border
paint.setStyle (Paint.Style.STROKE);
paint.setShader (null);
canvas.drawRect (x - 0.5f, y - 0.5f,
x + W + 0.5f, y + H + 0.5f, paint);
// draw the checker-board pattern
paint.setStyle (Paint.Style.FILL);
paint.setShader (mBG);
canvas.drawRect (x, y, x + W, y + H, paint);
// draw the src/dst example into our offscreen bitmap
int sc = canvas.saveLayer (x, y, x + W, y + H, null,
Canvas.MATRIX_SAVE_FLAG |
Canvas.CLIP_SAVE_FLAG |
Canvas.HAS_ALPHA_LAYER_SAVE_FLAG |
Canvas.FULL_COLOR_LAYER_SAVE_FLAG |
Canvas.CLIP_TO_LAYER_SAVE_FLAG);
canvas.translate (x, y);
canvas.drawBitmap (mDstB, 0, 0, paint);
paint.setXfermode (sModes [i]);
canvas.drawBitmap (mSrcB, 0, 0, paint);
paint.setXfermode (null);
canvas.restoreToCount (sc);
// draw the label
canvas.drawText (sLabels [i],
x + W / 2, y - labelP.getTextSize () / 2, labelP);
x += W + 10;
// wrap around when we've drawn enough for one row
if ((i % ROW_MAX) == ROW_MAX - 1) {
x = 0;
y += H + 30;
}
}
}
