protected override void OnMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
var width = (int)Math.Ceiling(textPaint.MeasureText(text)) + 2;
var metrics = textPaint.GetFontMetricsInt();
var height = -metrics.Top + metrics.Bottom + 2;
SetMeasuredDimension(width, height);
}
/// <summary>
/// Draws the specified string to the backing store.
/// </summary>
/// <param name="text">The <see cref="System.String"/> to draw.</param>
/// <param name="font">The <see cref="System.Drawing.Font"/> that will be used.</param>
/// <param name="brush">The <see cref="System.Drawing.Brush"/> that will be used.</param>
/// <param name="point">The location of the text on the backing store, in 2d pixel coordinates.
/// The origin (0, 0) lies at the top-left corner of the backing store.</param>
public void DrawString(string text, Paint paint, Point point)
{
m_Canvas.DrawText(text, point.X, point.Y - paint.GetFontMetricsInt().Ascent, paint); // render text on the bitmap
// Fix ugly looking anti-alias
IntPtr data = m_Bitmap.LockPixels();
unsafe
{
// Pointer to the current pixel
uint *pPixel = (uint *)data;
// Pointer value at which we terminate the loop (end of pixel data)
var pLastPixel = pPixel + m_Bitmap.Width * m_Bitmap.Height;
uint pixelValue, brightness;
while (pPixel < pLastPixel)
{
// Get pixel data
pixelValue = *pPixel;
// Average RGB
brightness = (((pixelValue & 0xff) + ((pixelValue >> 8) & 0xff) + ((pixelValue >> 16) & 0xff)) * 21845) >> 16; // Division by 3
// Use brightness for alpha value, set R, G, and B 0xff (white)
pixelValue = brightness << 24 | 0xffffff;
// Copy back to image
*pPixel = pixelValue;
// Next pixel
pPixel++;
}
}
m_Bitmap.UnlockPixels();
OpenTK.LoadTextureInternal(m_Texture, m_Bitmap); // copy bitmap to gl texture
}
override public void Draw(Canvas canvas, ICharSequence text, int start, int end,
float defaultX, int top, int defaultY, int bottom, Paint paint)
{
float x = 0;
float y = 0;
switch (position)
{
case RIGHT_TOP:
x = canvas.Width - paint.MeasureText(text, start, end);
y = paint.TextSize;
break;
case RIGHT_CENTER:
x = canvas.Width - paint.MeasureText(text, start, end);
y = canvas.Height / 2;
break;
case RIGHT_BOTTOM:
x = canvas.Width - paint.MeasureText(text, start, end);
y = canvas.Height - paint.GetFontMetricsInt().Bottom;
break;
}
if (color != -1)
{
paint.Color = color;
}
canvas.DrawText(text, start, end, x, y, paint);
}
public void drawLine()
{
if (canvas != null)
{
//canvas.DrawColor(Color.Transparent);
canvas.DrawColor(Color.Argb(160, 166, 166, 166));
Rect targetRect = new Rect(0, top - textRectHeight, width, textRectHeight);
Paint paint = new Paint(PaintFlags.AntiAlias);
paint.StrokeWidth = 2;
paint.TextSize = 36;
//canvas.DrawRect(targetRect, paint);
paint.Color = txtColor;
FontMetricsInt fontMetrics = paint.GetFontMetricsInt();
int baseline = (targetRect.Bottom + targetRect.Top - fontMetrics.Bottom - fontMetrics.Top) / 2 + 80;
paint.TextAlign = Align.Center;
canvas.DrawText(tip, targetRect.CenterX(), baseline, paint);
Paint linePaint = new Paint();
linePaint.AntiAlias = true;
linePaint.Color = rectColor;
linePaint.StrokeWidth = 5;
linePaint.SetStyle(Style.Stroke);
//左上
int lefttop_x = middle - rectWidthhalf;
canvas.DrawLine(lefttop_x, top, lefttop_x + len, top, linePaint);
canvas.DrawLine(lefttop_x, top, lefttop_x, top + len, linePaint);
//右上
int righttop_x = middle + rectWidthhalf;
canvas.DrawLine(righttop_x, top, righttop_x - len, top, linePaint);
canvas.DrawLine(righttop_x, top, righttop_x, top + len, linePaint);
//左下
int leftbottom_x = lefttop_x;
int leftbottom_y = top + rectHeight;
canvas.DrawLine(leftbottom_x, leftbottom_y, leftbottom_x + len, leftbottom_y, linePaint);
canvas.DrawLine(leftbottom_x, leftbottom_y, leftbottom_x, leftbottom_y - len, linePaint);
//右下
int rightbottom_x = middle + rectWidthhalf;
int rightbottom_y = top + rectHeight;
canvas.DrawLine(rightbottom_x, rightbottom_y, rightbottom_x - len, rightbottom_y, linePaint);
canvas.DrawLine(rightbottom_x, rightbottom_y, rightbottom_x, rightbottom_y - len, linePaint);
//清屏
Paint clearPaint = new Paint();
clearPaint.AntiAlias = true;
clearPaint.SetXfermode(new PorterDuffXfermode(PorterDuff.Mode.Clear));
canvas.DrawRect(new Rect {
Left = lefttop_x, Top = top, Right = rightbottom_x, Bottom = rightbottom_y
}, clearPaint);
sh.UnlockCanvasAndPost(canvas);
}
}
public override void Draw(Canvas canvas, ICharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint)
{
canvas.Save();
var cachedDrawable = getCachedDrawable();
var transY = bottom - cachedDrawable.Bounds.Bottom - (paint.GetFontMetricsInt().Descent - (int)(paint.GetFontMetrics().Ascent / 2f));
canvas.Translate(x, (-paint.GetFontMetrics().Ascent) / 2f + transY / 2f);
cachedDrawable.Draw(canvas);
canvas.Restore();
}
protected override void OnDraw(Canvas canvas)
{
if (null != text)
{
// 画圆
canvas.DrawCircle(Width / 2, Width / 2, Width / 2, mPaintBackground);
// 写字
mPaintText.TextSize = (Width / 2);
mPaintText.StrokeWidth = (3);
mPaintText.GetTextBounds(text, 0, 1, mRect);
// 垂直居中
Paint.FontMetricsInt fontMetrics = mPaintText.GetFontMetricsInt();
int baseline = (MeasuredHeight - fontMetrics.Bottom - fontMetrics.Top) / 2;
// 左右居中
mPaintText.TextAlign = Align.Center;
canvas.DrawText(text, Width / 2, baseline, mPaintText);
}
}
public override int GetSize(Paint paint, ICharSequence text, int start, int end, Paint.FontMetricsInt fm)
{
Rect rect = drawable.Bounds;
if (fm != null)
{
Paint.FontMetricsInt fmPaint = paint.GetFontMetricsInt();
int fontHeight = fmPaint.Bottom - fmPaint.Top;
int drHeight = rect.Bottom - rect.Top;
int top = drHeight / 2 - fontHeight / 4;
int bottom = drHeight / 2 + fontHeight / 4;
fm.Ascent = -bottom;
fm.Top = -bottom;
fm.Bottom = top;
fm.Descent = top;
}
return(rect.Right);
}
protected override void OnDraw(Canvas canvas)
{
base.OnDraw(canvas);
int hourHeight = mHourHeight;
Paint dividerPaint = mDividerPaint;
dividerPaint.Color = mDividerColor;
dividerPaint.SetStyle(Paint.Style.Fill);
Paint labelPaint = mLabelPaint;
labelPaint.Color = mLabelColor;
labelPaint.TextSize = mLabelTextSize;
labelPaint.SetTypeface(Typeface.DefaultBold);
labelPaint.AntiAlias = true;
var metrics = labelPaint.GetFontMetricsInt();
int labelHeight = Math.Abs(metrics.Ascent);
int labelOffset = labelHeight + mLabelPaddingLeft;
int right = Right;
// Walk left side of canvas drawing timestamps
int hours = mEndHour - mStartHour;
for (int i = 0; i < hours; i++)
{
int dividerY = hourHeight * i;
int nextDividerY = hourHeight * (i + 1);
canvas.DrawLine(0, dividerY, right, dividerY, dividerPaint);
// draw text title for timestamp
canvas.DrawRect(0, dividerY, mHeaderWidth, nextDividerY, dividerPaint);
// TODO: localize these labels better, including handling
// 24-hour mode when set in framework.
int hour = mStartHour + i;
String label;
if (hour == 0)
{
label = "12am";
}
else if (hour <= 11)
{
label = hour + "am";
}
else if (hour == 12)
{
label = "12pm";
}
else
{
label = (hour - 12) + "pm";
}
float labelWidth = labelPaint.MeasureText(label);
canvas.DrawText(label, 0, label.Length, mHeaderWidth - labelWidth - mLabelPaddingLeft, dividerY + labelOffset, labelPaint);
}
}