// ========================================================================
float measurePrimaryYaxisTickLabels(Paint hash_mark_label_paint) {
MinMax y_span = mRenderer.getYPrimaryAxisSpan();
Rect text_bounds_holder = new Rect();
List<Integer> y_label_widths = new ArrayList<Integer>();
for (Double ylabel : MathHelper.getLabels(y_span, mRenderer.getYLabels())) {
String y_label = getLabel(ylabel, Axis.Y_AXIS);
hash_mark_label_paint.getTextBounds(y_label, 0, y_label.length(), text_bounds_holder);
int label_width = text_bounds_holder.width();
y_label_widths.add(label_width);
}
float max_label_width = Collections.max(y_label_widths);
return max_label_width + VERTICAL_AXIS_LINE_LABEL_CLEARANCE;
}
// ========================================================================
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;
}
protected void drawVerticalAxisLabels(
Canvas canvas,
Rect frame,
Paint hash_mark_label_paint,
double yPixelsPerUnit,
double ySecondaryPixelsPerUnit,
float vertical_axis_hash_mark_width,
float vertical_secondary_axis_hash_mark_width) {
MinMax y_span = mRenderer.getYPrimaryAxisSpan();
List<Double> yLabels = MathHelper.getLabels(y_span, mRenderer.getYLabels());
List<List<Double>> vertical_axis_datasets = new ArrayList<List<Double>>();
List<MinMax> vertical_axis_spans = new ArrayList<MinMax>();
vertical_axis_datasets.add(yLabels);
vertical_axis_spans.add(y_span);
if (mRenderer.hasSecondaryYAxis()) {
MinMax secondary_span = mRenderer.getYSecondaryAxisSpan();
vertical_axis_datasets.add(
MathHelper.getLabels(secondary_span, mRenderer.getSecondaryYLabels()));
vertical_axis_spans.add(secondary_span);
}
double[] vertical_pixels_per_unit = new double[] {yPixelsPerUnit, ySecondaryPixelsPerUnit};
for (int vertical_axis_index = 0;
vertical_axis_index < vertical_axis_datasets.size();
vertical_axis_index++) {
// List<Double> vertical_labels = vertical_axis_datasets.get(0);
List<Double> vertical_labels = vertical_axis_datasets.get(vertical_axis_index);
MinMax label_span = vertical_axis_spans.get(vertical_axis_index);
hash_mark_label_paint.setTextAlign(label_alignments[vertical_axis_index]);
for (int i = 0; i < vertical_labels.size(); i++) {
double label = vertical_labels.get(i);
float label_value =
(float)
(frame.bottom
- vertical_pixels_per_unit[vertical_axis_index]
* (label - label_span.min.doubleValue()));
float grid_line_startx, grid_line_stopx, hash_mark_startx, hash_mark_stopx;
float label_x_offset;
if (vertical_axis_index == 0) {
grid_line_startx = frame.left;
grid_line_stopx = frame.right;
hash_mark_startx = grid_line_startx - vertical_axis_hash_mark_width;
hash_mark_stopx = grid_line_startx;
label_x_offset = frame.left - VERTICAL_AXIS_LINE_LABEL_CLEARANCE;
} else {
grid_line_startx = frame.left;
grid_line_stopx = frame.right;
hash_mark_startx = grid_line_stopx;
hash_mark_stopx = grid_line_stopx + vertical_secondary_axis_hash_mark_width;
label_x_offset = frame.right + VERTICAL_AXIS_LINE_LABEL_CLEARANCE;
}
if (mRenderer.isShowLabels()) {
hash_mark_label_paint.setColor(grid_line_colors[vertical_axis_index]);
// hash_mark_label_paint.setColor(mRenderer.getLabelsColor()); // XXX
canvas.drawLine(
hash_mark_startx, label_value, hash_mark_stopx, label_value, hash_mark_label_paint);
String label_string = getLabel(label, vertical_axis_enums[vertical_axis_index]);
hash_mark_label_paint.measureText(label_string);
drawText(
canvas,
getLabel(label, vertical_axis_enums[vertical_axis_index]),
label_x_offset,
label_value - VERTICAL_AXIS_LABEL_HASH_MARK_CLEARANCE,
hash_mark_label_paint,
0);
}
if (mRenderer.isShowGrid() && mRenderer.isShowGridHorizontalLines()) {
hash_mark_label_paint.setColor(grid_line_colors[vertical_axis_index]);
hash_mark_label_paint.setPathEffect(grid_line_path_effects[vertical_axis_index]);
canvas.drawLine(
grid_line_startx, label_value, grid_line_stopx, label_value, hash_mark_label_paint);
hash_mark_label_paint.setPathEffect(null);
}
}
}
}
/**
* 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);
}
}
