// ========================================================================
float measureXaxisTickLabels(Paint hash_mark_label_paint, MinMax x_span) {
Rect text_bounds_holder = new Rect();
List<Integer> x_label_heights = new ArrayList<Integer>();
for (Double xlabel : MathHelper.getLabels(x_span, mRenderer.getXLabels())) {
String x_label = getLabel(xlabel, Axis.X_AXIS);
hash_mark_label_paint.getTextBounds(x_label, 0, x_label.length(), text_bounds_holder);
int label_height = text_bounds_holder.height();
x_label_heights.add(label_height);
}
float max_x_label_height = Collections.max(x_label_heights);
return max_x_label_height
+ VERTICAL_AXIS_LINE_LABEL_CLEARANCE
+ DEFAULT_HORIZONTAL_AXIS_HASH_MARK_LENGTH;
}
/**
* The graphical representation of the XY chart.
*
* @param canvas the canvas to paint to
* @param x the top left x value of the view to draw to
* @param y the top left y value of the view to draw to
* @param width the width of the view to draw to
* @param height the height of the view to draw to
*/
@Override
public void draw(Canvas canvas, int width, int height) {
TextPaint hash_mark_label_paint = new TextPaint();
hash_mark_label_paint.setTextSize(DEFAULT_HASH_MARK_TEXT_SIZE);
hash_mark_label_paint.setTypeface(DefaultRenderer.REGULAR_TEXT_FONT);
hash_mark_label_paint.setAntiAlias(getAntiAliased());
boolean rotate = Orientation.VERTICAL.equals(mRenderer.getOrientation());
mScale = (float) (height) / width;
mTranslate = Math.abs(width - height) / 2;
if (mScale < 1) {
mTranslate *= -1;
}
mCenter = new PointF(width / 2, height / 2);
if (rotate) {
transform(canvas, mRenderer.getOrientation().getAngle(), false);
}
MinMax x_span = mRenderer.getXAxisSpan();
float vertical_axis_hash_mark_width = 0;
float vertical_secondary_axis_hash_mark_width = 0;
float horizontal_axis_label_height = 0;
// Measure all y-axis label widths to determine the axis line position
if (mRenderer.isShowLabels() && mRenderer.getShowYAxis()) {
vertical_axis_hash_mark_width = measurePrimaryYaxisTickLabels(hash_mark_label_paint);
if (mRenderer.hasSecondaryYAxis()) {
Log.e(TAG, "Has secondary axis!!!");
vertical_secondary_axis_hash_mark_width =
measureSecondaryYaxisTickLabels(hash_mark_label_paint);
}
}
if (mRenderer.isShowLabels() && mRenderer.getShowXAxis()) {
horizontal_axis_label_height = measureXaxisTickLabels(hash_mark_label_paint, x_span);
}
Rect frame =
new Rect(
(int) Math.ceil(vertical_axis_hash_mark_width),
0,
width - (int) Math.ceil(vertical_secondary_axis_hash_mark_width),
height - (int) horizontal_axis_label_height);
double xPixelsPerUnit = getPixelsPerUnit(frame.width(), x_span);
double yPixelsPerUnit = getPixelsPerUnit(frame.height(), mRenderer.getYPrimaryAxisSpan());
double ySecondaryPixelsPerUnit = 0;
if (mRenderer.hasSecondaryYAxis())
ySecondaryPixelsPerUnit = getPixelsPerUnit(frame.height(), mRenderer.getYSecondaryAxisSpan());
if (mRenderer.isShowLabels() || mRenderer.isShowGrid()) {
List<Double> xLabels = MathHelper.getLabels(x_span, mRenderer.getXLabels());
if (mRenderer.isShowLabels()) {
hash_mark_label_paint.setColor(mRenderer.getLabelsColor());
hash_mark_label_paint.setTextAlign(Align.CENTER);
}
drawXLabels(
xLabels,
mRenderer.getXTextLabelLocations(),
canvas,
hash_mark_label_paint,
frame.left,
frame.top,
frame.bottom,
xPixelsPerUnit,
x_span.min.doubleValue(),
DEFAULT_HORIZONTAL_AXIS_HASH_MARK_LENGTH,
horizontal_axis_label_height - DEFAULT_HORIZONTAL_AXIS_HASH_MARK_LENGTH);
drawVerticalAxisLabels(
canvas,
frame,
hash_mark_label_paint,
yPixelsPerUnit,
ySecondaryPixelsPerUnit,
vertical_axis_hash_mark_width,
vertical_secondary_axis_hash_mark_width);
}
// This draws the plot boundaries.
drawPlotBoundaries(canvas, frame, hash_mark_label_paint);
// This draws the plot boundaries.
drawAllDataSets(
canvas,
frame,
hash_mark_label_paint,
xPixelsPerUnit,
yPixelsPerUnit,
ySecondaryPixelsPerUnit);
if (rotate) {
transform(canvas, mRenderer.getOrientation().getAngle(), true);
}
}