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Cairo-Chart
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This commit is contained in:
Kolan Sh 2018-01-22 16:14:06 +03:00
parent e0f9197cea
commit d24149d215
2 changed files with 36 additions and 37 deletions
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32
src/Axis.vala
View File

@ -194,38 +194,6 @@ namespace CairoChart {
time = dt.format(time_format) + dsec_str;
}
// TODO: move to Series.vala
public virtual void calc_rec_sizes (out double max_rec_width, out double max_rec_height, bool horizontal = true) {
max_rec_width = max_rec_height = 0;
for (var i = 0; i < nrecords; ++i) {
Float128 x = (int64)(range.zmin + range.zrange / nrecords * i) + 1.0/3.0;
switch (dtype) {
case Axis.DType.NUMBERS:
var text = new Text (chart, format.printf((LongDouble)x) + (horizontal ? "_" : ""), font);
max_rec_width = double.max (max_rec_width, text.width);
max_rec_height = double.max (max_rec_height, text.height);
break;
case Axis.DType.DATE_TIME:
string date, time;
print_dt(x, out date, out time);
var h = 0.0;
if (date_format != "") {
var text = new Text (chart, date + (horizontal ? "_" : ""), font);
max_rec_width = double.max (max_rec_width, text.width);
h = text.height;
}
if (time_format != "") {
var text = new Text (chart, time + (horizontal ? "_" : ""), font);
max_rec_width = double.max (max_rec_width, text.width);
h += text.height;
}
max_rec_height = double.max (max_rec_height, h);
break;
}
}
}
/**
* Zooms out ``Axis``.
*/

41
src/Series.vala
View File

@ -116,6 +116,37 @@ namespace CairoChart {
return true;
}
protected virtual void calc_rec_sizes (Axis axis, out double max_rec_width, out double max_rec_height, bool horizontal = true) {
max_rec_width = max_rec_height = 0;
for (var i = 0; i < axis.nrecords; ++i) {
Float128 x = (int64)(axis.range.zmin + axis.range.zrange / axis.nrecords * i) + 1.0/3.0;
switch (axis.dtype) {
case Axis.DType.NUMBERS:
var text = new Text (chart, axis.format.printf((LongDouble)x) + (horizontal ? "_" : ""), axis.font);
max_rec_width = double.max (max_rec_width, text.width);
max_rec_height = double.max (max_rec_height, text.height);
break;
case Axis.DType.DATE_TIME:
string date, time;
axis.print_dt(x, out date, out time);
var h = 0.0;
if (axis.date_format != "") {
var text = new Text (chart, date + (horizontal ? "_" : ""), axis.font);
max_rec_width = double.max (max_rec_width, text.width);
h = text.height;
}
if (axis.time_format != "") {
var text = new Text (chart, time + (horizontal ? "_" : ""), axis.font);
max_rec_width = double.max (max_rec_width, text.width);
h += text.height;
}
max_rec_height = double.max (max_rec_height, h);
break;
}
}
}
public virtual void join_axes (bool is_x, int si, ref int nskip) {
var s = chart.series[si];
Axis axis = s.axis_x;
@ -123,7 +154,7 @@ namespace CairoChart {
if (!s.zoom_show) return;
if (nskip != 0) {--nskip; return;}
double max_rec_width = 0; double max_rec_height = 0;
axis.calc_rec_sizes (out max_rec_width, out max_rec_height, is_x);
calc_rec_sizes (axis, out max_rec_width, out max_rec_height, is_x);
var max_font_spacing = is_x ? axis.font.vspacing : axis.font.hspacing;
var max_axis_font_width = axis.title.text == "" ? 0 : axis.title.width + axis.font.hspacing;
var max_axis_font_height = axis.title.text == "" ? 0 : axis.title.height + axis.font.vspacing;
@ -196,7 +227,7 @@ namespace CairoChart {
if (!has_intersection) {
if (calc_max_values) {
double tmp_max_rec_width = 0; double tmp_max_rec_height = 0;
s2.axis_x.calc_rec_sizes (out tmp_max_rec_width, out tmp_max_rec_height, true);
calc_rec_sizes (s2.axis_x, 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_spacing = double.max (max_font_spacing, s2.axis_x.font.vspacing);
@ -233,7 +264,7 @@ namespace CairoChart {
}
if (!has_intersection) {
double tmp_max_rec_width = 0; double tmp_max_rec_height = 0;
s2.axis_y.calc_rec_sizes (out tmp_max_rec_width, out tmp_max_rec_height, false);
calc_rec_sizes (s2.axis_y, 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_spacing = double.max (max_font_spacing, s2.axis_y.font.hspacing);
@ -329,7 +360,7 @@ namespace CairoChart {
// 1. Detect max record width/height by axis.nrecords equally selected points using format.
double max_rec_width, max_rec_height;
s.axis_x.calc_rec_sizes (out max_rec_width, out max_rec_height, true);
calc_rec_sizes (s.axis_x, 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) (chart.plarea.width * s.place.zwidth / max_rec_width);
@ -445,7 +476,7 @@ namespace CairoChart {
if (chart.joint_y && si != chart.zoom_1st_idx) return;
// 1. Detect max record width/height by axis.nrecords equally selected points using format.
double max_rec_width, max_rec_height;
s.axis_y.calc_rec_sizes (out max_rec_width, out max_rec_height, false);
calc_rec_sizes (s.axis_y, 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) (chart.plarea.height * s.place.zheight / max_rec_height);