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OK Chart:Cursors/Crosses -> Cursor.vala

This commit is contained in:
Kolan Sh 2018-01-16 11:44:44 +03:00
parent 57d5b886d4
commit bcad51fa89
4 changed files with 448 additions and 443 deletions
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454
src/Chart.vala
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@ -53,7 +53,7 @@ namespace CairoChart {
set_vertical_axes_titles (); set_vertical_axes_titles ();
get_cursors_crossings(); cursors2.get_cursors_crossings(this);
calc_plot_area (); calc_plot_area ();
@ -69,7 +69,7 @@ namespace CairoChart {
draw_series (); draw_series ();
check_cur_values (); check_cur_values ();
draw_cursors (); cursors2.draw_cursors (this);
check_cur_values (); check_cur_values ();
return true; return true;
@ -88,10 +88,10 @@ namespace CairoChart {
} }
// relative zoom limits // relative zoom limits
protected double rz_x_min = 0.0; public double rz_x_min { get; protected set; default = 0.0; }
protected double rz_x_max = 1.0; public double rz_x_max { get; protected set; default = 1.0; }
protected double rz_y_min = 0.0; public double rz_y_min { get; protected set; default = 0.0; }
protected double rz_y_max = 1.0; public double rz_y_max { get; protected set; default = 1.0; }
public int zoom_first_show { get; protected set; default = 0; } public int zoom_first_show { get; protected set; default = 0; }
@ -253,14 +253,14 @@ namespace CairoChart {
// for 4.2. Cursor values for joint X axis // for 4.2. Cursor values for joint X axis
if (si == zoom_first_show && cursors_crossings.length != 0) { if (si == zoom_first_show && cursors_crossings.length != 0) {
switch (cursor_style.orientation) { switch (cursor_style.orientation) {
case Cursor.Orientation.VERTICAL: case Cursors.Orientation.VERTICAL:
if (is_x && joint_x) if (is_x && joint_x)
switch (axis.position) { switch (axis.position) {
case Axis.Position.LOW: plot_y_max -= max_rec_height + axis.font_indent; break; case Axis.Position.LOW: plot_y_max -= max_rec_height + axis.font_indent; break;
case Axis.Position.HIGH: plot_y_min += max_rec_height + axis.font_indent; break; case Axis.Position.HIGH: plot_y_min += max_rec_height + axis.font_indent; break;
} }
break; break;
case Cursor.Orientation.HORIZONTAL: case Cursors.Orientation.HORIZONTAL:
if (!is_x && joint_y) if (!is_x && joint_y)
switch (s.axis_y.position) { switch (s.axis_y.position) {
case Axis.Position.LOW: plot_x_min += max_rec_width + s.axis_y.font_indent; break; case Axis.Position.LOW: plot_x_min += max_rec_width + s.axis_y.font_indent; break;
@ -316,7 +316,7 @@ namespace CairoChart {
+ sz.height * (y - (s.axis_y.zoom_min + s.axis_y.zoom_max) / 2.0) / (s.axis_y.zoom_max - s.axis_y.zoom_min); + sz.height * (y - (s.axis_y.zoom_min + s.axis_y.zoom_max) / 2.0) / (s.axis_y.zoom_max - s.axis_y.zoom_min);
} }
public CairoChart.Math math = new Math(); public CairoChart.Math math { get; protected set; default = new Math(); }
protected virtual void draw_horizontal_axes () { protected virtual void draw_horizontal_axes () {
for (var si = series.length - 1, nskip = 0; si >=0; --si) for (var si = series.length - 1, nskip = 0; si >=0; --si)
@ -353,17 +353,17 @@ namespace CairoChart {
return Point (get_scr_x(s, p.x), get_scr_y(s, p.y)); return Point (get_scr_x(s, p.x), get_scr_y(s, p.y));
} }
protected virtual Float128 get_real_x (Series s, double scr_x) { public virtual Float128 get_real_x (Series s, double scr_x) {
return s.axis_x.zoom_min + ((scr_x - plot_x_min) / (plot_x_max - plot_x_min) - s.place.zoom_x_min) return s.axis_x.zoom_min + ((scr_x - plot_x_min) / (plot_x_max - plot_x_min) - s.place.zoom_x_min)
* (s.axis_x.zoom_max - s.axis_x.zoom_min) / (s.place.zoom_x_max - s.place.zoom_x_min); * (s.axis_x.zoom_max - s.axis_x.zoom_min) / (s.place.zoom_x_max - s.place.zoom_x_min);
} }
protected virtual Float128 get_real_y (Series s, double scr_y) { public virtual Float128 get_real_y (Series s, double scr_y) {
return s.axis_y.zoom_min + ((plot_y_max - scr_y) / (plot_y_max - plot_y_min) - s.place.zoom_y_min) return s.axis_y.zoom_min + ((plot_y_max - scr_y) / (plot_y_max - plot_y_min) - s.place.zoom_y_min)
* (s.axis_y.zoom_max - s.axis_y.zoom_min) / (s.place.zoom_y_max - s.place.zoom_y_min); * (s.axis_y.zoom_max - s.axis_y.zoom_min) / (s.place.zoom_y_max - s.place.zoom_y_min);
} }
protected virtual Point get_real_point (Series s, Point p) { public virtual Point get_real_point (Series s, Point p) {
return Point (get_real_x(s, p.x), get_real_y(s, p.y)); return Point (get_real_x(s, p.x), get_real_y(s, p.y));
} }
@ -393,9 +393,13 @@ namespace CairoChart {
} }
} }
protected List<Point?> cursors = new List<Point?> (); public Cursors cursors2 { get; protected set; default = new Cursors (); }
protected Point active_cursor = Point ();
protected bool is_cursor_active = false; public List<Point?> cursors = new List<Point?> ();
public Point active_cursor = Point(); // { get; protected set; default = Point (); }
public bool is_cursor_active { get; protected set; default = false; }
public Cursors.Style cursor_style = Cursors.Style();
public virtual void set_active_cursor (double x, double y, bool remove = false) { public virtual void set_active_cursor (double x, double y, bool remove = false) {
active_cursor = Point (scr2rel_x(x), scr2rel_y(y)); active_cursor = Point (scr2rel_x(x), scr2rel_y(y));
@ -407,8 +411,6 @@ namespace CairoChart {
is_cursor_active = false; is_cursor_active = false;
} }
public Cursor.Style cursor_style = Cursor.Style();
public virtual void remove_active_cursor () { public virtual void remove_active_cursor () {
if (cursors.length() == 0) return; if (cursors.length() == 0) return;
var distance = width * width; var distance = width * width;
@ -417,10 +419,10 @@ namespace CairoChart {
foreach (var c in cursors) { foreach (var c in cursors) {
double d = distance; double d = distance;
switch (cursor_style.orientation) { switch (cursor_style.orientation) {
case Cursor.Orientation.VERTICAL: case Cursors.Orientation.VERTICAL:
d = (rel2scr_x(c.x) - rel2scr_x(active_cursor.x)).abs(); d = (rel2scr_x(c.x) - rel2scr_x(active_cursor.x)).abs();
break; break;
case Cursor.Orientation.HORIZONTAL: case Cursors.Orientation.HORIZONTAL:
d = (rel2scr_y(c.y) - rel2scr_y(active_cursor.y)).abs(); d = (rel2scr_y(c.y) - rel2scr_y(active_cursor.y)).abs();
break; break;
} }
@ -445,425 +447,19 @@ namespace CairoChart {
return Point (scr2rel_x(p.x), scr2rel_y(p.y)); return Point (scr2rel_x(p.x), scr2rel_y(p.y));
} }
protected virtual Float128 rel2scr_x(Float128 x) { public virtual Float128 rel2scr_x(Float128 x) {
return plot_x_min + (plot_x_max - plot_x_min) * (x - rz_x_min) / (rz_x_max - rz_x_min); return plot_x_min + (plot_x_max - plot_x_min) * (x - rz_x_min) / (rz_x_max - rz_x_min);
} }
protected virtual Float128 rel2scr_y(Float128 y) { public virtual Float128 rel2scr_y(Float128 y) {
return plot_y_min + (plot_y_max - plot_y_min) * (y - rz_y_min) / (rz_y_max - rz_y_min); return plot_y_min + (plot_y_max - plot_y_min) * (y - rz_y_min) / (rz_y_max - rz_y_min);
} }
protected virtual Point rel2scr_point (Point p) { public virtual Point rel2scr_point (Point p) {
return Point (rel2scr_x(p.x), rel2scr_y(p.y)); return Point (rel2scr_x(p.x), rel2scr_y(p.y));
} }
protected struct CursorCross { public Cursors.CursorCrossings[] cursors_crossings = {};
uint series_index;
Point point;
Point size;
bool show_x;
bool show_date;
bool show_time;
bool show_y;
Point scr_point;
Point scr_value_point;
}
protected struct CursorCrossings {
uint cursor_index;
CursorCross[] crossings;
}
public CursorCrossings[] cursors_crossings = {};
protected List<Point?> get_all_cursors () {
var all_cursors = cursors.copy_deep ((src) => { return src; });
if (is_cursor_active)
all_cursors.append(active_cursor);
return all_cursors;
}
protected void get_cursors_crossings () {
var all_cursors = get_all_cursors();
CursorCrossings[] local_cursor_crossings = {};
for (var ci = 0, max_ci = all_cursors.length(); ci < max_ci; ++ci) {
var c = all_cursors.nth_data(ci);
switch (cursor_style.orientation) {
case Cursor.Orientation.VERTICAL:
if (c.x <= rz_x_min || c.x >= rz_x_max) continue; break;
case Cursor.Orientation.HORIZONTAL:
if (c.y <= rz_y_min || c.y >= rz_y_max) continue; break;
}
CursorCross[] crossings = {};
for (var si = 0, max_si = series.length; si < max_si; ++si) {
var s = series[si];
if (!s.zoom_show) continue;
Point[] points = {};
switch (cursor_style.orientation) {
case Cursor.Orientation.VERTICAL:
points = math.sort_points (s, s.sort);
break;
case Cursor.Orientation.HORIZONTAL:
points = math.sort_points (s, s.sort);
break;
}
for (var i = 0; i + 1 < points.length; ++i) {
switch (cursor_style.orientation) {
case Cursor.Orientation.VERTICAL:
Float128 y = 0.0;
if (math.vcross(get_scr_point(s, points[i]), get_scr_point(s, points[i+1]), rel2scr_x(c.x),
plot_y_min, plot_y_max, out y)) {
var point = Point(get_real_x(s, rel2scr_x(c.x)), get_real_y(s, y));
Point size; bool show_x, show_date, show_time, show_y;
cross_what_to_show(s, out show_x, out show_time, out show_date, out show_y);
calc_cross_sizes (s, point, out size, show_x, show_time, show_date, show_y);
CursorCross cc = {si, point, size, show_x, show_date, show_time, show_y};
crossings += cc;
}
break;
case Cursor.Orientation.HORIZONTAL:
Float128 x = 0.0;
if (math.hcross(get_scr_point(s, points[i]), get_scr_point(s, points[i+1]),
plot_x_min, plot_x_max, rel2scr_y(c.y), out x)) {
var point = Point(get_real_x(s, x), get_real_y(s, rel2scr_y(c.y)));
Point size; bool show_x, show_date, show_time, show_y;
cross_what_to_show(s, out show_x, out show_time, out show_date, out show_y);
calc_cross_sizes (s, point, out size, show_x, show_time, show_date, show_y);
CursorCross cc = {si, point, size, show_x, show_date, show_time, show_y};
crossings += cc;
}
break;
}
}
}
if (crossings.length != 0) {
CursorCrossings ccs = {ci, crossings};
local_cursor_crossings += ccs;
}
}
cursors_crossings = local_cursor_crossings;
}
protected virtual void calc_cursors_value_positions () {
for (var ccsi = 0, max_ccsi = cursors_crossings.length; ccsi < max_ccsi; ++ccsi) {
for (var cci = 0, max_cci = cursors_crossings[ccsi].crossings.length; cci < max_cci; ++cci) {
// TODO: Ticket #142: find smart algorithm of cursors values placements
unowned CursorCross[] cr = cursors_crossings[ccsi].crossings;
cr[cci].scr_point = get_scr_point (series[cr[cci].series_index], cr[cci].point);
var d_max = double.max (cr[cci].size.x / 1.5, cr[cci].size.y / 1.5);
cr[cci].scr_value_point = Point (cr[cci].scr_point.x + d_max, cr[cci].scr_point.y - d_max);
}
}
}
protected virtual void cross_what_to_show (Series s, out bool show_x, out bool show_time,
out bool show_date, out bool show_y) {
show_x = show_time = show_date = show_y = false;
switch (cursor_style.orientation) {
case Cursor.Orientation.VERTICAL:
show_y = true;
if (!joint_x)
switch (s.axis_x.type) {
case Axis.Type.NUMBERS: show_x = true; break;
case Axis.Type.DATE_TIME:
if (s.axis_x.date_format != "") show_date = true;
if (s.axis_x.time_format != "") show_time = true;
break;
}
break;
case Cursor.Orientation.HORIZONTAL:
if (!joint_y) show_y = true;
switch (s.axis_x.type) {
case Axis.Type.NUMBERS: show_x = true; break;
case Axis.Type.DATE_TIME:
if (s.axis_x.date_format != "") show_date = true;
if (s.axis_x.time_format != "") show_time = true;
break;
}
break;
}
}
protected virtual void calc_cross_sizes (Series s, Point p, out Point size,
bool show_x = false, bool show_time = false,
bool show_date = false, bool show_y = false) {
if (show_x == show_time == show_date == show_y == false)
cross_what_to_show(s, out show_x, out show_time, out show_date, out show_y);
size = Point ();
string date, time;
s.axis_x.format_date_time(p.x, out date, out time);
var date_t = new Text (date, s.axis_x.font_style, s.axis_x.color);
var time_t = new Text (time, s.axis_x.font_style, s.axis_x.color);
var x_t = new Text (s.axis_x.format.printf((LongDouble)p.x), s.axis_x.font_style, s.axis_x.color);
var y_t = new Text (s.axis_y.format.printf((LongDouble)p.y), s.axis_y.font_style, s.axis_y.color);
double h_x = 0.0, h_y = 0.0;
if (show_x) { var sz = x_t.get_size(context); size.x = sz.width; h_x = sz.height; }
if (show_date) { var sz = date_t.get_size(context); size.x = sz.width; h_x = sz.height; }
if (show_time) { var sz = time_t.get_size(context); size.x = double.max(size.x, sz.width); h_x += sz.height; }
if (show_y) { var sz = y_t.get_size(context); size.x += sz.width; h_y = sz.height; }
if ((show_x || show_date || show_time) && show_y) size.x += double.max(s.axis_x.font_indent, s.axis_y.font_indent);
if (show_date && show_time) h_x += s.axis_x.font_indent;
size.y = double.max (h_x, h_y);
}
protected virtual void draw_cursors () {
if (series.length == 0) return;
var all_cursors = get_all_cursors();
calc_cursors_value_positions();
for (var cci = 0, max_cci = cursors_crossings.length; cci < max_cci; ++cci) {
var low = Point(plot_x_max, plot_y_max); // low and high
var high = Point(plot_x_min, plot_y_min); // points of the cursor
unowned CursorCross[] ccs = cursors_crossings[cci].crossings;
cursor_style.line_style.set(this);
for (var ci = 0, max_ci = ccs.length; ci < max_ci; ++ci) {
var si = ccs[ci].series_index;
var s = series[si];
var p = ccs[ci].point;
var scrx = get_scr_x(s, p.x);
var scry = get_scr_y(s, p.y);
if (scrx < low.x) low.x = scrx;
if (scry < low.y) low.y = scry;
if (scrx > high.x) high.x = scrx;
if (scry > high.y) high.y = scry;
if (joint_x) {
switch (s.axis_x.position) {
case Axis.Position.LOW: high.y = plot_y_max + s.axis_x.font_indent; break;
case Axis.Position.HIGH: low.y = plot_y_min - s.axis_x.font_indent; break;
case Axis.Position.BOTH:
high.y = plot_y_max + s.axis_x.font_indent;
low.y = plot_y_min - s.axis_x.font_indent;
break;
}
}
if (joint_y) {
switch (s.axis_y.position) {
case Axis.Position.LOW: low.x = plot_x_min - s.axis_y.font_indent; break;
case Axis.Position.HIGH: high.x = plot_x_max + s.axis_y.font_indent; break;
case Axis.Position.BOTH:
low.x = plot_x_min - s.axis_y.font_indent;
high.x = plot_x_max + s.axis_y.font_indent;
break;
}
}
context.move_to (ccs[ci].scr_point.x, ccs[ci].scr_point.y);
context.line_to (ccs[ci].scr_value_point.x, ccs[ci].scr_value_point.y);
}
var c = all_cursors.nth_data(cursors_crossings[cci].cursor_index);
switch (cursor_style.orientation) {
case Cursor.Orientation.VERTICAL:
if (low.y > high.y) continue;
context.move_to (rel2scr_x(c.x), low.y);
context.line_to (rel2scr_x(c.x), high.y);
// show joint X value
if (joint_x) {
var s = series[zoom_first_show];
var x = get_real_x(s, rel2scr_x(c.x));
string text = "", time_text = "";
switch (s.axis_x.type) {
case Axis.Type.NUMBERS:
text = s.axis_x.format.printf((LongDouble)x);
break;
case Axis.Type.DATE_TIME:
s.axis_x.format_date_time(x, out text, out time_text);
break;
default:
break;
}
var text_t = new Text(text, s.axis_x.font_style, s.axis_x.color);
var sz = text_t.get_size(context);
var time_text_t = new Text(time_text, s.axis_x.font_style, s.axis_x.color);
var print_y = 0.0;
switch (s.axis_x.position) {
case Axis.Position.LOW: print_y = y_min + height - s.axis_x.font_indent
- (legend.position == Legend.Position.BOTTOM ? legend.height : 0);
break;
case Axis.Position.HIGH: print_y = y_min + title_height + s.axis_x.font_indent
+ (legend.position == Legend.Position.TOP ? legend.height : 0);
switch (s.axis_x.type) {
case Axis.Type.NUMBERS:
print_y += sz.height;
break;
case Axis.Type.DATE_TIME:
print_y += (s.axis_x.date_format == "" ? 0 : sz.height)
+ (s.axis_x.time_format == "" ? 0 : time_text_t.get_height(context))
+ (s.axis_x.date_format == "" || s.axis_x.time_format == "" ? 0 : s.axis_x.font_indent);
break;
}
break;
}
var print_x = compact_rec_x_pos (s, x, text_t);
context.move_to (print_x, print_y);
switch (s.axis_x.type) {
case Axis.Type.NUMBERS:
text_t.show(context);
break;
case Axis.Type.DATE_TIME:
if (s.axis_x.date_format != "") text_t.show(context);
print_x = compact_rec_x_pos (s, x, time_text_t);
context.move_to (print_x, print_y - (s.axis_x.date_format == "" ? 0 : sz.height + s.axis_x.font_indent));
if (s.axis_x.time_format != "") time_text_t.show(context);
break;
}
}
break;
case Cursor.Orientation.HORIZONTAL:
if (low.x > high.x) continue;
context.move_to (low.x, rel2scr_y(c.y));
context.line_to (high.x, rel2scr_y(c.y));
// show joint Y value
if (joint_y) {
var s = series[zoom_first_show];
var y = get_real_y(s, rel2scr_y(c.y));
var text_t = new Text(s.axis_y.format.printf((LongDouble)y, s.axis_y.font_style));
var print_y = compact_rec_y_pos (s, y, text_t);
var print_x = 0.0;
switch (s.axis_y.position) {
case Axis.Position.LOW:
print_x = x_min + s.axis_y.font_indent
+ (legend.position == Legend.Position.LEFT ? legend.width : 0);
break;
case Axis.Position.HIGH:
print_x = x_min + width - text_t.get_width(context) - s.axis_y.font_indent
- (legend.position == Legend.Position.RIGHT ? legend.width : 0);
break;
}
context.move_to (print_x, print_y);
text_t.show(context);
}
break;
}
context.stroke ();
// show value (X, Y or [X;Y])
for (var ci = 0, max_ci = ccs.length; ci < max_ci; ++ci) {
var si = ccs[ci].series_index;
var s = series[si];
var point = ccs[ci].point;
var size = ccs[ci].size;
var svp = ccs[ci].scr_value_point;
var show_x = ccs[ci].show_x;
var show_date = ccs[ci].show_date;
var show_time = ccs[ci].show_time;
var show_y = ccs[ci].show_y;
set_source_rgba(bg_color);
context.rectangle (svp.x - size.x / 2, svp.y - size.y / 2, size.x, size.y);
context.fill();
if (show_x) {
set_source_rgba(s.axis_x.color);
var text_t = new Text(s.axis_x.format.printf((LongDouble)point.x), s.axis_x.font_style);
context.move_to (svp.x - size.x / 2, svp.y + text_t.get_height(context) / 2);
if (joint_x) set_source_rgba (joint_axis_color);
text_t.show(context);
}
if (show_time) {
set_source_rgba(s.axis_x.color);
string date = "", time = "";
s.axis_x.format_date_time(point.x, out date, out time);
var text_t = new Text(time, s.axis_x.font_style);
var sz = text_t.get_size(context);
var y = svp.y + sz.height / 2;
if (show_date) y -= sz.height / 2 + s.axis_x.font_indent / 2;
context.move_to (svp.x - size.x / 2, y);
if (joint_x) set_source_rgba (joint_axis_color);
text_t.show(context);
}
if (show_date) {
set_source_rgba(s.axis_x.color);
string date = "", time = "";
s.axis_x.format_date_time(point.x, out date, out time);
var text_t = new Text(date, s.axis_x.font_style);
var sz = text_t.get_size(context);
var y = svp.y + sz.height / 2;
if (show_time) y += sz.height / 2 + s.axis_x.font_indent / 2;
context.move_to (svp.x - size.x / 2, y);
if (joint_x) set_source_rgba (joint_axis_color);
text_t.show(context);
}
if (show_y) {
set_source_rgba(s.axis_y.color);
var text_t = new Text(s.axis_y.format.printf((LongDouble)point.y), s.axis_y.font_style);
var sz = text_t.get_size(context);
context.move_to (svp.x + size.x / 2 - sz.width, svp.y + sz.height / 2);
if (joint_y) set_source_rgba (joint_axis_color);
text_t.show(context);
}
}
}
}
public bool get_cursors_delta (out Float128 delta) {
delta = 0.0;
if (series.length == 0) return false;
if (cursors.length() + (is_cursor_active ? 1 : 0) != 2) return false;
if (joint_x && cursor_style.orientation == Cursor.Orientation.VERTICAL) {
Float128 val1 = get_real_x (series[zoom_first_show], rel2scr_x(cursors.nth_data(0).x));
Float128 val2 = 0;
if (is_cursor_active)
val2 = get_real_x (series[zoom_first_show], rel2scr_x(active_cursor.x));
else
val2 = get_real_x (series[zoom_first_show], rel2scr_x(cursors.nth_data(1).x));
if (val2 > val1)
delta = val2 - val1;
else
delta = val1 - val2;
return true;
}
if (joint_y && cursor_style.orientation == Cursor.Orientation.HORIZONTAL) {
Float128 val1 = get_real_y (series[zoom_first_show], rel2scr_y(cursors.nth_data(0).y));
Float128 val2 = 0;
if (is_cursor_active)
val2 = get_real_y (series[zoom_first_show], rel2scr_y(active_cursor.y));
else
val2 = get_real_y (series[zoom_first_show], rel2scr_y(cursors.nth_data(1).y));
if (val2 > val1)
delta = val2 - val1;
else
delta = val1 - val2;
return true;
}
return false;
}
public string get_cursors_delta_str () {
Float128 delta = 0.0;
if (!get_cursors_delta(out delta)) return "";
var str = "";
var s = series[zoom_first_show];
if (joint_x)
switch (s.axis_x.type) {
case Axis.Type.NUMBERS:
str = s.axis_x.format.printf((LongDouble)delta);
break;
case Axis.Type.DATE_TIME:
var date = "", time = "";
int64 days = (int64)(delta / 24 / 3600);
s.axis_x.format_date_time(delta, out date, out time);
str = days.to_string() + " + " + time;
break;
}
if (joint_y) {
str = s.axis_y.format.printf((LongDouble)delta);
}
return str;
}
public Chart copy () { public Chart copy () {
var chart = new Chart (); var chart = new Chart ();

411
src/Cursor.vala
View File

@ -1,6 +1,9 @@
namespace CairoChart { namespace CairoChart {
public class Cursor { public class Cursors {
public Cursors () {
}
public enum Orientation { public enum Orientation {
VERTICAL = 0, // default VERTICAL = 0, // default
@ -19,5 +22,411 @@ namespace CairoChart {
line_style = Line.Style(Color(0.2, 0.2, 0.2, 0.8)); line_style = Line.Style(Color(0.2, 0.2, 0.2, 0.8));
} }
} }
protected struct CursorCross {
uint series_index;
Point point;
Point size;
bool show_x;
bool show_date;
bool show_time;
bool show_y;
Point scr_point;
Point scr_value_point;
}
protected struct CursorCrossings {
uint cursor_index;
CursorCross[] crossings;
}
protected List<Point?> get_all_cursors (Chart chart) {
var all_cursors = chart.cursors.copy_deep ((src) => { return src; });
if (chart.is_cursor_active)
all_cursors.append(chart.active_cursor);
return all_cursors;
}
public void get_cursors_crossings (Chart chart) {
var all_cursors = get_all_cursors(chart);
CursorCrossings[] local_cursor_crossings = {};
for (var ci = 0, max_ci = all_cursors.length(); ci < max_ci; ++ci) {
var c = all_cursors.nth_data(ci);
switch (chart.cursor_style.orientation) {
case Orientation.VERTICAL:
if (c.x <= chart.rz_x_min || c.x >= chart.rz_x_max) continue; break;
case Orientation.HORIZONTAL:
if (c.y <= chart.rz_y_min || c.y >= chart.rz_y_max) continue; break;
}
CursorCross[] crossings = {};
for (var si = 0, max_si = chart.series.length; si < max_si; ++si) {
var s = chart.series[si];
if (!s.zoom_show) continue;
Point[] points = {};
switch (chart.cursor_style.orientation) {
case Orientation.VERTICAL:
points = chart.math.sort_points (s, s.sort);
break;
case Orientation.HORIZONTAL:
points = chart.math.sort_points (s, s.sort);
break;
}
for (var i = 0; i + 1 < points.length; ++i) {
switch (chart.cursor_style.orientation) {
case Orientation.VERTICAL:
Float128 y = 0.0;
if (chart.math.vcross(chart.get_scr_point(s, points[i]), chart.get_scr_point(s, points[i+1]), chart.rel2scr_x(c.x),
chart.plot_y_min, chart.plot_y_max, out y)) {
var point = Point(chart.get_real_x(s, chart.rel2scr_x(c.x)), chart.get_real_y(s, y));
Point size; bool show_x, show_date, show_time, show_y;
cross_what_to_show(chart, s, out show_x, out show_time, out show_date, out show_y);
calc_cross_sizes (chart, s, point, out size, show_x, show_time, show_date, show_y);
CursorCross cc = {si, point, size, show_x, show_date, show_time, show_y};
crossings += cc;
}
break;
case Orientation.HORIZONTAL:
Float128 x = 0.0;
if (chart.math.hcross(chart.get_scr_point(s, points[i]), chart.get_scr_point(s, points[i+1]),
chart.plot_x_min, chart.plot_x_max, chart.rel2scr_y(c.y), out x)) {
var point = Point(chart.get_real_x(s, x), chart.get_real_y(s, chart.rel2scr_y(c.y)));
Point size; bool show_x, show_date, show_time, show_y;
cross_what_to_show(chart, s, out show_x, out show_time, out show_date, out show_y);
calc_cross_sizes (chart, s, point, out size, show_x, show_time, show_date, show_y);
CursorCross cc = {si, point, size, show_x, show_date, show_time, show_y};
crossings += cc;
}
break;
}
}
}
if (crossings.length != 0) {
CursorCrossings ccs = {ci, crossings};
local_cursor_crossings += ccs;
}
}
chart.cursors_crossings = local_cursor_crossings;
}
protected virtual void calc_cursors_value_positions (Chart chart) {
for (var ccsi = 0, max_ccsi = chart.cursors_crossings.length; ccsi < max_ccsi; ++ccsi) {
for (var cci = 0, max_cci = chart.cursors_crossings[ccsi].crossings.length; cci < max_cci; ++cci) {
// TODO: Ticket #142: find smart algorithm of cursors values placements
unowned CursorCross[] cr = chart.cursors_crossings[ccsi].crossings;
cr[cci].scr_point = chart.get_scr_point (chart.series[cr[cci].series_index], cr[cci].point);
var d_max = double.max (cr[cci].size.x / 1.5, cr[cci].size.y / 1.5);
cr[cci].scr_value_point = Point (cr[cci].scr_point.x + d_max, cr[cci].scr_point.y - d_max);
}
}
}
protected virtual void cross_what_to_show (Chart chart, Series s, out bool show_x, out bool show_time,
out bool show_date, out bool show_y) {
show_x = show_time = show_date = show_y = false;
switch (chart.cursor_style.orientation) {
case Orientation.VERTICAL:
show_y = true;
if (!chart.joint_x)
switch (s.axis_x.type) {
case Axis.Type.NUMBERS: show_x = true; break;
case Axis.Type.DATE_TIME:
if (s.axis_x.date_format != "") show_date = true;
if (s.axis_x.time_format != "") show_time = true;
break;
}
break;
case Orientation.HORIZONTAL:
if (!chart.joint_y) show_y = true;
switch (s.axis_x.type) {
case Axis.Type.NUMBERS: show_x = true; break;
case Axis.Type.DATE_TIME:
if (s.axis_x.date_format != "") show_date = true;
if (s.axis_x.time_format != "") show_time = true;
break;
}
break;
}
}
protected virtual void calc_cross_sizes (Chart chart, Series s, Point p, out Point size,
bool show_x = false, bool show_time = false,
bool show_date = false, bool show_y = false) {
if (show_x == show_time == show_date == show_y == false)
cross_what_to_show(chart, s, out show_x, out show_time, out show_date, out show_y);
size = Point ();
string date, time;
s.axis_x.format_date_time(p.x, out date, out time);
var date_t = new Text (date, s.axis_x.font_style, s.axis_x.color);
var time_t = new Text (time, s.axis_x.font_style, s.axis_x.color);
var x_t = new Text (s.axis_x.format.printf((LongDouble)p.x), s.axis_x.font_style, s.axis_x.color);
var y_t = new Text (s.axis_y.format.printf((LongDouble)p.y), s.axis_y.font_style, s.axis_y.color);
double h_x = 0.0, h_y = 0.0;
if (show_x) { var sz = x_t.get_size(chart.context); size.x = sz.width; h_x = sz.height; }
if (show_date) { var sz = date_t.get_size(chart.context); size.x = sz.width; h_x = sz.height; }
if (show_time) { var sz = time_t.get_size(chart.context); size.x = double.max(size.x, sz.width); h_x += sz.height; }
if (show_y) { var sz = y_t.get_size(chart.context); size.x += sz.width; h_y = sz.height; }
if ((show_x || show_date || show_time) && show_y) size.x += double.max(s.axis_x.font_indent, s.axis_y.font_indent);
if (show_date && show_time) h_x += s.axis_x.font_indent;
size.y = double.max (h_x, h_y);
}
public virtual void draw_cursors (Chart chart) {
if (chart.series.length == 0) return;
var all_cursors = get_all_cursors(chart);
calc_cursors_value_positions(chart);
for (var cci = 0, max_cci = chart.cursors_crossings.length; cci < max_cci; ++cci) {
var low = Point(chart.plot_x_max, chart.plot_y_max); // low and high
var high = Point(chart.plot_x_min, chart.plot_y_min); // points of the cursor
unowned CursorCross[] ccs = chart.cursors_crossings[cci].crossings;
chart.cursor_style.line_style.set(chart);
for (var ci = 0, max_ci = ccs.length; ci < max_ci; ++ci) {
var si = ccs[ci].series_index;
var s = chart.series[si];
var p = ccs[ci].point;
var scrx = chart.get_scr_x(s, p.x);
var scry = chart.get_scr_y(s, p.y);
if (scrx < low.x) low.x = scrx;
if (scry < low.y) low.y = scry;
if (scrx > high.x) high.x = scrx;
if (scry > high.y) high.y = scry;
if (chart.joint_x) {
switch (s.axis_x.position) {
case Axis.Position.LOW: high.y = chart.plot_y_max + s.axis_x.font_indent; break;
case Axis.Position.HIGH: low.y = chart.plot_y_min - s.axis_x.font_indent; break;
case Axis.Position.BOTH:
high.y = chart.plot_y_max + s.axis_x.font_indent;
low.y = chart.plot_y_min - s.axis_x.font_indent;
break;
}
}
if (chart.joint_y) {
switch (s.axis_y.position) {
case Axis.Position.LOW: low.x = chart.plot_x_min - s.axis_y.font_indent; break;
case Axis.Position.HIGH: high.x = chart.plot_x_max + s.axis_y.font_indent; break;
case Axis.Position.BOTH:
low.x = chart.plot_x_min - s.axis_y.font_indent;
high.x = chart.plot_x_max + s.axis_y.font_indent;
break;
}
}
chart.context.move_to (ccs[ci].scr_point.x, ccs[ci].scr_point.y);
chart.context.line_to (ccs[ci].scr_value_point.x, ccs[ci].scr_value_point.y);
}
var c = all_cursors.nth_data(chart.cursors_crossings[cci].cursor_index);
switch (chart.cursor_style.orientation) {
case Orientation.VERTICAL:
if (low.y > high.y) continue;
chart.context.move_to (chart.rel2scr_x(c.x), low.y);
chart.context.line_to (chart.rel2scr_x(c.x), high.y);
// show joint X value
if (chart.joint_x) {
var s = chart.series[chart.zoom_first_show];
var x = chart.get_real_x(s, chart.rel2scr_x(c.x));
string text = "", time_text = "";
switch (s.axis_x.type) {
case Axis.Type.NUMBERS:
text = s.axis_x.format.printf((LongDouble)x);
break;
case Axis.Type.DATE_TIME:
s.axis_x.format_date_time(x, out text, out time_text);
break;
default:
break;
}
var text_t = new Text(text, s.axis_x.font_style, s.axis_x.color);
var sz = text_t.get_size(chart.context);
var time_text_t = new Text(time_text, s.axis_x.font_style, s.axis_x.color);
var print_y = 0.0;
switch (s.axis_x.position) {
case Axis.Position.LOW: print_y = chart.y_min + chart.height - s.axis_x.font_indent
- (chart.legend.position == Legend.Position.BOTTOM ? chart.legend.height : 0);
break;
case Axis.Position.HIGH: print_y = chart.y_min + chart.title_height + s.axis_x.font_indent
+ (chart.legend.position == Legend.Position.TOP ? chart.legend.height : 0);
switch (s.axis_x.type) {
case Axis.Type.NUMBERS:
print_y += sz.height;
break;
case Axis.Type.DATE_TIME:
print_y += (s.axis_x.date_format == "" ? 0 : sz.height)
+ (s.axis_x.time_format == "" ? 0 : time_text_t.get_height(chart.context))
+ (s.axis_x.date_format == "" || s.axis_x.time_format == "" ? 0 : s.axis_x.font_indent);
break;
}
break;
}
var print_x = chart.compact_rec_x_pos (s, x, text_t);
chart.context.move_to (print_x, print_y);
switch (s.axis_x.type) {
case Axis.Type.NUMBERS:
text_t.show(chart.context);
break;
case Axis.Type.DATE_TIME:
if (s.axis_x.date_format != "") text_t.show(chart.context);
print_x = chart.compact_rec_x_pos (s, x, time_text_t);
chart.context.move_to (print_x, print_y - (s.axis_x.date_format == "" ? 0 : sz.height + s.axis_x.font_indent));
if (s.axis_x.time_format != "") time_text_t.show(chart.context);
break;
}
}
break;
case Orientation.HORIZONTAL:
if (low.x > high.x) continue;
chart.context.move_to (low.x, chart.rel2scr_y(c.y));
chart.context.line_to (high.x, chart.rel2scr_y(c.y));
// show joint Y value
if (chart.joint_y) {
var s = chart.series[chart.zoom_first_show];
var y = chart.get_real_y(s, chart.rel2scr_y(c.y));
var text_t = new Text(s.axis_y.format.printf((LongDouble)y, s.axis_y.font_style));
var print_y = chart.compact_rec_y_pos (s, y, text_t);
var print_x = 0.0;
switch (s.axis_y.position) {
case Axis.Position.LOW:
print_x = chart.x_min + s.axis_y.font_indent
+ (chart.legend.position == Legend.Position.LEFT ? chart.legend.width : 0);
break;
case Axis.Position.HIGH:
print_x = chart.x_min + chart.width - text_t.get_width(chart.context) - s.axis_y.font_indent
- (chart.legend.position == Legend.Position.RIGHT ? chart.legend.width : 0);
break;
}
chart.context.move_to (print_x, print_y);
text_t.show(chart.context);
}
break;
}
chart.context.stroke ();
// show value (X, Y or [X;Y])
for (var ci = 0, max_ci = ccs.length; ci < max_ci; ++ci) {
var si = ccs[ci].series_index;
var s = chart.series[si];
var point = ccs[ci].point;
var size = ccs[ci].size;
var svp = ccs[ci].scr_value_point;
var show_x = ccs[ci].show_x;
var show_date = ccs[ci].show_date;
var show_time = ccs[ci].show_time;
var show_y = ccs[ci].show_y;
chart.set_source_rgba(chart.bg_color);
chart.context.rectangle (svp.x - size.x / 2, svp.y - size.y / 2, size.x, size.y);
chart.context.fill();
if (show_x) {
chart.set_source_rgba(s.axis_x.color);
var text_t = new Text(s.axis_x.format.printf((LongDouble)point.x), s.axis_x.font_style);
chart.context.move_to (svp.x - size.x / 2, svp.y + text_t.get_height(chart.context) / 2);
if (chart.joint_x) chart.set_source_rgba (chart.joint_axis_color);
text_t.show(chart.context);
}
if (show_time) {
chart.set_source_rgba(s.axis_x.color);
string date = "", time = "";
s.axis_x.format_date_time(point.x, out date, out time);
var text_t = new Text(time, s.axis_x.font_style);
var sz = text_t.get_size(chart.context);
var y = svp.y + sz.height / 2;
if (show_date) y -= sz.height / 2 + s.axis_x.font_indent / 2;
chart.context.move_to (svp.x - size.x / 2, y);
if (chart.joint_x) chart.set_source_rgba (chart.joint_axis_color);
text_t.show(chart.context);
}
if (show_date) {
chart.set_source_rgba(s.axis_x.color);
string date = "", time = "";
s.axis_x.format_date_time(point.x, out date, out time);
var text_t = new Text(date, s.axis_x.font_style);
var sz = text_t.get_size(chart.context);
var y = svp.y + sz.height / 2;
if (show_time) y += sz.height / 2 + s.axis_x.font_indent / 2;
chart.context.move_to (svp.x - size.x / 2, y);
if (chart.joint_x) chart.set_source_rgba (chart.joint_axis_color);
text_t.show(chart.context);
}
if (show_y) {
chart.set_source_rgba(s.axis_y.color);
var text_t = new Text(s.axis_y.format.printf((LongDouble)point.y), s.axis_y.font_style);
var sz = text_t.get_size(chart.context);
chart.context.move_to (svp.x + size.x / 2 - sz.width, svp.y + sz.height / 2);
if (chart.joint_y) chart.set_source_rgba (chart.joint_axis_color);
text_t.show(chart.context);
}
}
}
}
public bool get_cursors_delta (Chart chart, out Float128 delta) {
delta = 0.0;
if (chart.series.length == 0) return false;
if (chart.cursors.length() + (chart.is_cursor_active ? 1 : 0) != 2) return false;
if (chart.joint_x && chart.cursor_style.orientation == Orientation.VERTICAL) {
Float128 val1 = chart.get_real_x (chart.series[chart.zoom_first_show], chart.rel2scr_x(chart.cursors.nth_data(0).x));
Float128 val2 = 0;
if (chart.is_cursor_active)
val2 = chart.get_real_x (chart.series[chart.zoom_first_show], chart.rel2scr_x(chart.active_cursor.x));
else
val2 = chart.get_real_x (chart.series[chart.zoom_first_show], chart.rel2scr_x(chart.cursors.nth_data(1).x));
if (val2 > val1)
delta = val2 - val1;
else
delta = val1 - val2;
return true;
}
if (chart.joint_y && chart.cursor_style.orientation == Orientation.HORIZONTAL) {
Float128 val1 = chart.get_real_y (chart.series[chart.zoom_first_show], chart.rel2scr_y(chart.cursors.nth_data(0).y));
Float128 val2 = 0;
if (chart.is_cursor_active)
val2 = chart.get_real_y (chart.series[chart.zoom_first_show], chart.rel2scr_y(chart.active_cursor.y));
else
val2 = chart.get_real_y (chart.series[chart.zoom_first_show], chart.rel2scr_y(chart.cursors.nth_data(1).y));
if (val2 > val1)
delta = val2 - val1;
else
delta = val1 - val2;
return true;
}
return false;
}
public string get_cursors_delta_str (Chart chart) {
Float128 delta = 0.0;
if (!get_cursors_delta(chart, out delta)) return "";
var str = "";
var s = chart.series[chart.zoom_first_show];
if (chart.joint_x)
switch (s.axis_x.type) {
case Axis.Type.NUMBERS:
str = s.axis_x.format.printf((LongDouble)delta);
break;
case Axis.Type.DATE_TIME:
var date = "", time = "";
int64 days = (int64)(delta / 24 / 3600);
s.axis_x.format_date_time(delta, out date, out time);
str = days.to_string() + " + " + time;
break;
}
if (chart.joint_y) {
str = s.axis_y.format.printf((LongDouble)delta);
}
return str;
}
} }
} }

4
src/Series.vala
View File

@ -297,7 +297,7 @@ namespace CairoChart {
if (x_min < s.axis_x.zoom_min) x_min += step; if (x_min < s.axis_x.zoom_min) x_min += step;
// 4.2. Cursor values for joint X axis // 4.2. Cursor values for joint X axis
if (chart.joint_x && chart.cursor_style.orientation == Cursor.Orientation.VERTICAL && chart.cursors_crossings.length != 0) { if (chart.joint_x && chart.cursor_style.orientation == Cursors.Orientation.VERTICAL && chart.cursors_crossings.length != 0) {
switch (s.axis_x.position) { switch (s.axis_x.position) {
case Axis.Position.LOW: chart.cur_y_max -= max_rec_height + s.axis_x.font_indent; break; case Axis.Position.LOW: chart.cur_y_max -= max_rec_height + s.axis_x.font_indent; break;
case Axis.Position.HIGH: chart.cur_y_min += max_rec_height + s.axis_x.font_indent; break; case Axis.Position.HIGH: chart.cur_y_min += max_rec_height + s.axis_x.font_indent; break;
@ -421,7 +421,7 @@ namespace CairoChart {
if (y_min < s.axis_y.zoom_min) y_min += step; if (y_min < s.axis_y.zoom_min) y_min += step;
// 4.2. Cursor values for joint Y axis // 4.2. Cursor values for joint Y axis
if (chart.joint_y && chart.cursor_style.orientation == Cursor.Orientation.HORIZONTAL && chart.cursors_crossings.length != 0) { if (chart.joint_y && chart.cursor_style.orientation == Cursors.Orientation.HORIZONTAL && chart.cursors_crossings.length != 0) {
switch (s.axis_y.position) { switch (s.axis_y.position) {
case Axis.Position.LOW: chart.cur_x_min += max_rec_width + s.axis_y.font_indent; break; case Axis.Position.LOW: chart.cur_x_min += max_rec_width + s.axis_y.font_indent; break;
case Axis.Position.HIGH: chart.cur_x_max -= max_rec_width + s.axis_y.font_indent; break; case Axis.Position.HIGH: chart.cur_x_max -= max_rec_width + s.axis_y.font_indent; break;

22
test/ChartTest.vala
View File

@ -275,8 +275,8 @@ int main (string[] args) {
case Legend.Position.BOTTOM: radio_button4.set_active(true); break; case Legend.Position.BOTTOM: radio_button4.set_active(true); break;
} }
switch (chart.cursor_style.orientation) { switch (chart.cursor_style.orientation) {
case Cursor.Orientation.VERTICAL: radio_button7.set_active(true); break; case Cursors.Orientation.VERTICAL: radio_button7.set_active(true); break;
case Cursor.Orientation.HORIZONTAL: radio_button8.set_active(true); break; case Cursors.Orientation.HORIZONTAL: radio_button8.set_active(true); break;
} }
}); });
button2.clicked.connect (() => { button2.clicked.connect (() => {
@ -288,8 +288,8 @@ int main (string[] args) {
case Legend.Position.BOTTOM: radio_button4.set_active(true); break; case Legend.Position.BOTTOM: radio_button4.set_active(true); break;
} }
switch (chart.cursor_style.orientation) { switch (chart.cursor_style.orientation) {
case Cursor.Orientation.VERTICAL: radio_button7.set_active(true); break; case Cursors.Orientation.VERTICAL: radio_button7.set_active(true); break;
case Cursor.Orientation.HORIZONTAL: radio_button8.set_active(true); break; case Cursors.Orientation.HORIZONTAL: radio_button8.set_active(true); break;
} }
}); });
button3.clicked.connect (() => { button3.clicked.connect (() => {
@ -301,8 +301,8 @@ int main (string[] args) {
case Legend.Position.BOTTOM: radio_button4.set_active(true); break; case Legend.Position.BOTTOM: radio_button4.set_active(true); break;
} }
switch (chart.cursor_style.orientation) { switch (chart.cursor_style.orientation) {
case Cursor.Orientation.VERTICAL: radio_button7.set_active(true); break; case Cursors.Orientation.VERTICAL: radio_button7.set_active(true); break;
case Cursor.Orientation.HORIZONTAL: radio_button8.set_active(true); break; case Cursors.Orientation.HORIZONTAL: radio_button8.set_active(true); break;
} }
}); });
button4.clicked.connect (() => { button4.clicked.connect (() => {
@ -314,8 +314,8 @@ int main (string[] args) {
case Legend.Position.BOTTOM: radio_button4.set_active(true); break; case Legend.Position.BOTTOM: radio_button4.set_active(true); break;
} }
switch (chart.cursor_style.orientation) { switch (chart.cursor_style.orientation) {
case Cursor.Orientation.VERTICAL: radio_button7.set_active(true); break; case Cursors.Orientation.VERTICAL: radio_button7.set_active(true); break;
case Cursor.Orientation.HORIZONTAL: radio_button8.set_active(true); break; case Cursors.Orientation.HORIZONTAL: radio_button8.set_active(true); break;
} }
}); });
button5.clicked.connect (() => { button5.clicked.connect (() => {
@ -397,13 +397,13 @@ int main (string[] args) {
radio_button7.toggled.connect ((button) => { radio_button7.toggled.connect ((button) => {
if (button.get_active()) { if (button.get_active()) {
chart.cursor_style.orientation = Cursor.Orientation.VERTICAL; chart.cursor_style.orientation = Cursors.Orientation.VERTICAL;
da.queue_draw_area(0, 0, da.get_allocated_width(), da.get_allocated_height()); da.queue_draw_area(0, 0, da.get_allocated_width(), da.get_allocated_height());
} }
}); });
radio_button8.toggled.connect ((button) => { radio_button8.toggled.connect ((button) => {
if (button.get_active()) { if (button.get_active()) {
chart.cursor_style.orientation = Cursor.Orientation.HORIZONTAL; chart.cursor_style.orientation = Cursors.Orientation.HORIZONTAL;
da.queue_draw_area(0, 0, da.get_allocated_width(), da.get_allocated_height()); da.queue_draw_area(0, 0, da.get_allocated_width(), da.get_allocated_height());
} }
}); });
@ -429,7 +429,7 @@ int main (string[] args) {
chart.draw_selection (sel_x0, sel_y0, sel_x1, sel_y1); chart.draw_selection (sel_x0, sel_y0, sel_x1, sel_y1);
// show delta // show delta
var str = chart.get_cursors_delta_str(); var str = chart.cursors2.get_cursors_delta_str(chart);
if (str != "") { if (str != "") {
var text = "Δ = " + str; var text = "Δ = " + str;
var text_t = new Text(text); var text_t = new Text(text);