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calc_axis_rec_sizes() -> Axis.vala

This commit is contained in:
Kolan Sh 2018-01-10 14:15:42 +03:00
parent c0ca87a207
commit d114385034
2 changed files with 60 additions and 60 deletions
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46
src/Axis.vala
View File

@ -93,9 +93,55 @@ namespace CairoChart {
axis.scale_type = this.scale_type;
axis.title = this.title.copy();
axis.type = this.type;
axis.nrecords = this.nrecords;
return axis;
}
public Axis () {}
public int nrecords = 128;
public virtual void format_date_time (Float128 x, out string date, out string time) {
date = time = "";
var dt = new DateTime.from_unix_utc((int64)x);
date = dt.format(date_format);
var dsec_str =
("%."+(dsec_signs.to_string())+"Lf").printf((LongDouble)(x - (int64)x)).offset(1);
time = dt.format(time_format) + dsec_str;
}
public virtual void calc_rec_sizes (Chart chart, out double max_rec_width, out double max_rec_height, bool is_horizontal = true) {
max_rec_width = max_rec_height = 0;
for (var i = 0; i < nrecords; ++i) {
Float128 x = (int64)(zoom_min + (zoom_max - zoom_min) / nrecords * i) + 1.0/3.0;
switch (type) {
case Axis.Type.NUMBERS:
var text = new Text (format.printf((LongDouble)x) + (is_horizontal ? "_" : ""), font_style);
var sz = text.get_size(chart.context);
max_rec_width = double.max (max_rec_width, sz.width);
max_rec_height = double.max (max_rec_height, sz.height);
break;
case Axis.Type.DATE_TIME:
string date, time;
format_date_time(x, out date, out time);
var h = 0.0;
if (date_format != "") {
var text = new Text (date + (is_horizontal ? "_" : ""), font_style);
var sz = text.get_size(chart.context);
max_rec_width = double.max (max_rec_width, sz.width);
h = sz.height;
}
if (time_format != "") {
var text = new Text (time + (is_horizontal ? "_" : ""), font_style);
var sz = text.get_size(chart.context);
max_rec_width = double.max (max_rec_width, sz.width);
h += sz.height;
}
max_rec_height = double.max (max_rec_height, h);
break;
}
}
}
}
}

74
src/Chart.vala
View File

@ -216,42 +216,6 @@ namespace CairoChart {
context.stroke();
}
protected int axis_rec_npoints = 128;
protected virtual void calc_axis_rec_sizes (Axis axis, out double max_rec_width, out double max_rec_height, bool is_horizontal = true) {
max_rec_width = max_rec_height = 0;
for (var i = 0; i < axis_rec_npoints; ++i) {
Float128 x = (int64)(axis.zoom_min + (axis.zoom_max - axis.zoom_min) / axis_rec_npoints * i) + 1.0/3.0;
switch (axis.type) {
case Axis.Type.NUMBERS:
var text = new Text (axis.format.printf((LongDouble)x) + (is_horizontal ? "_" : ""), axis.font_style);
var sz = text.get_size(context);
max_rec_width = double.max (max_rec_width, sz.width);
max_rec_height = double.max (max_rec_height, sz.height);
break;
case Axis.Type.DATE_TIME:
string date, time;
format_date_time(axis, x, out date, out time);
var h = 0.0;
if (axis.date_format != "") {
var text = new Text (date + (is_horizontal ? "_" : ""), axis.font_style);
var sz = text.get_size(context);
max_rec_width = double.max (max_rec_width, sz.width);
h = sz.height;
}
if (axis.time_format != "") {
var text = new Text (time + (is_horizontal ? "_" : ""), axis.font_style);
var sz = text.get_size(context);
max_rec_width = double.max (max_rec_width, sz.width);
h += sz.height;
}
max_rec_height = double.max (max_rec_height, h);
break;
}
}
}
protected virtual Float128 calc_round_step (Float128 aver_step, bool date_time = false) {
Float128 step = 1.0;
@ -329,7 +293,7 @@ namespace CairoChart {
if (!s.zoom_show) continue;
if (nskip != 0) {--nskip; continue;}
double max_rec_width = 0; double max_rec_height = 0;
calc_axis_rec_sizes (s.axis_x, out max_rec_width, out max_rec_height, true);
s.axis_x.calc_rec_sizes (this, out max_rec_width, out max_rec_height, true);
var max_font_indent = s.axis_x.font_indent;
var max_axis_font_height = s.axis_x.title.text == "" ? 0 : s.axis_x.title.get_height(context) + s.axis_x.font_indent;
@ -350,7 +314,7 @@ namespace CairoChart {
}
if (!has_intersection) {
double tmp_max_rec_width = 0; double tmp_max_rec_height = 0;
calc_axis_rec_sizes (s2.axis_x, out tmp_max_rec_width, out tmp_max_rec_height, true);
s2.axis_x.calc_rec_sizes (this, out tmp_max_rec_width, out tmp_max_rec_height, true);
max_rec_width = double.max (max_rec_width, tmp_max_rec_width);
max_rec_height = double.max (max_rec_height, tmp_max_rec_height);
max_font_indent = double.max (max_font_indent, s2.axis_x.font_indent);
@ -383,7 +347,7 @@ namespace CairoChart {
if (!s.zoom_show) continue;
if (nskip != 0) {--nskip; continue;}
double max_rec_width = 0; double max_rec_height = 0;
calc_axis_rec_sizes (s.axis_y, out max_rec_width, out max_rec_height, false);
s.axis_y.calc_rec_sizes (this, out max_rec_width, out max_rec_height, false);
var max_font_indent = s.axis_y.font_indent;
var max_axis_font_width = s.axis_y.title.text == "" ? 0 : s.axis_y.title.get_width(context) + s.axis_y.font_indent;
@ -404,7 +368,7 @@ namespace CairoChart {
}
if (!has_intersection) {
double tmp_max_rec_width = 0; double tmp_max_rec_height = 0;
calc_axis_rec_sizes (s2.axis_y, out tmp_max_rec_width, out tmp_max_rec_height, false);
s2.axis_y.calc_rec_sizes (this, out tmp_max_rec_width, out tmp_max_rec_height, false);
max_rec_width = double.max (max_rec_width, tmp_max_rec_width);
max_rec_height = double.max (max_rec_height, tmp_max_rec_height);
max_font_indent = double.max (max_font_indent, s2.axis_y.font_indent);
@ -450,24 +414,15 @@ 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);
}
protected virtual void format_date_time (Axis axis, Float128 x, out string date, out string time) {
date = time = "";
var dt = new DateTime.from_unix_utc((int64)x);
date = dt.format(axis.date_format);
var dsec_str =
("%."+(axis.dsec_signs.to_string())+"Lf").printf((LongDouble)(x - (int64)x)).offset(1);
time = dt.format(axis.time_format) + dsec_str;
}
protected virtual void draw_horizontal_axis () {
for (var si = series.length - 1, nskip = 0; si >=0; --si) {
var s = series[si];
if (!s.zoom_show) continue;
if (joint_x && si != zoom_first_show) continue;
// 1. Detect max record width/height by axis_rec_npoints equally selected points using format.
// 1. Detect max record width/height by axis.nrecords equally selected points using format.
double max_rec_width, max_rec_height;
calc_axis_rec_sizes (s.axis_x, out max_rec_width, out max_rec_height, true);
s.axis_x.calc_rec_sizes (this, out max_rec_width, out max_rec_height, true);
// 2. Calculate maximal available number of records, take into account the space width.
long max_nrecs = (long) ((plot_x_max - plot_x_min) * (s.place.zoom_x_max - s.place.zoom_x_min) / max_rec_width);
@ -523,7 +478,7 @@ namespace CairoChart {
text = s.axis_x.format.printf((LongDouble)x);
break;
case Axis.Type.DATE_TIME:
format_date_time(s.axis_x, x, out text, out time_text);
s.axis_x.format_date_time(x, out text, out time_text);
break;
}
var scr_x = get_scr_x (s, x);
@ -630,9 +585,9 @@ namespace CairoChart {
var s = series[si];
if (!s.zoom_show) continue;
if (joint_y && si != zoom_first_show) continue;
// 1. Detect max record width/height by axis_rec_npoints equally selected points using format.
// 1. Detect max record width/height by axis.nrecords equally selected points using format.
double max_rec_width, max_rec_height;
calc_axis_rec_sizes (s.axis_y, out max_rec_width, out max_rec_height, false);
s.axis_y.calc_rec_sizes (this, out max_rec_width, out max_rec_height, false);
// 2. Calculate maximal available number of records, take into account the space width.
long max_nrecs = (long) ((plot_y_max - plot_y_min) * (s.place.zoom_y_max - s.place.zoom_y_min) / max_rec_height);
@ -1153,7 +1108,7 @@ namespace CairoChart {
cross_what_to_show(s, out show_x, out show_time, out show_date, out show_y);
size = Point ();
string date, time;
format_date_time(s.axis_x, p.x, out date, out 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);
@ -1233,7 +1188,7 @@ namespace CairoChart {
text = s.axis_x.format.printf((LongDouble)x);
break;
case Axis.Type.DATE_TIME:
format_date_time(s.axis_x, x, out text, out time_text);
s.axis_x.format_date_time(x, out text, out time_text);
break;
default:
break;
@ -1332,7 +1287,7 @@ namespace CairoChart {
if (show_time) {
set_source_rgba(s.axis_x.color);
string date = "", time = "";
format_date_time(s.axis_x, point.x, out date, out 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;
@ -1345,7 +1300,7 @@ namespace CairoChart {
if (show_date) {
set_source_rgba(s.axis_x.color);
string date = "", time = "";
format_date_time(s.axis_x, point.x, out date, out 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;
@ -1413,7 +1368,7 @@ namespace CairoChart {
case Axis.Type.DATE_TIME:
var date = "", time = "";
int64 days = (int64)(delta / 24 / 3600);
format_date_time(s.axis_x, delta, out date, out time);
s.axis_x.format_date_time(delta, out date, out time);
str = days.to_string() + " + " + time;
break;
}
@ -1426,7 +1381,6 @@ namespace CairoChart {
public Chart copy () {
var chart = new Chart ();
chart.active_cursor = this.active_cursor;
chart.axis_rec_npoints = this.axis_rec_npoints;
chart.bg_color = this.bg_color;
chart.border_color = this.border_color;
chart.joint_x = this.joint_x;