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Cairo-Chart
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This commit is contained in:
Kolan Sh 2018-01-21 17:27:46 +03:00
parent dc9b896232
commit 2d4d01d532
7 changed files with 253 additions and 162 deletions
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22
src/Axis.vala
View File

@ -4,7 +4,8 @@ namespace CairoChart {
// or specify series name near the axis
public class Axis {
public Range range = new Range();
public Text title = new Text ("");
Chart chart;
public Text title;
public enum Type {
NUMBERS = 0,
DATE_TIME
@ -65,7 +66,7 @@ namespace CairoChart {
public double font_spacing = 5;
public virtual Axis copy () {
var axis = new Axis ();
var axis = new Axis (chart);
axis._date_format = this._date_format;
axis._dsec_signs = this._dsec_signs;
axis._format = this._format;
@ -84,7 +85,10 @@ namespace CairoChart {
return axis;
}
public Axis () {}
public Axis (Chart chart) {
this.chart = chart;
title = new Text (chart, "");
}
public int nrecords = 128;
@ -103,8 +107,8 @@ namespace CairoChart {
Float128 x = (int64)(range.zmin + range.zrange / nrecords * i) + 1.0/3.0;
switch (type) {
case Axis.Type.NUMBERS:
var text = new Text (format.printf((LongDouble)x) + (horizontal ? "_" : ""), font_style);
var sz = text.get_size(chart.ctx);
var text = new Text (chart, format.printf((LongDouble)x) + (horizontal ? "_" : ""), font_style);
var sz = text.size;
max_rec_width = double.max (max_rec_width, sz.width);
max_rec_height = double.max (max_rec_height, sz.height);
break;
@ -114,14 +118,14 @@ namespace CairoChart {
var h = 0.0;
if (date_format != "") {
var text = new Text (date + (horizontal ? "_" : ""), font_style);
var sz = text.get_size(chart.ctx);
var text = new Text (chart, date + (horizontal ? "_" : ""), font_style);
var sz = text.size;
max_rec_width = double.max (max_rec_width, sz.width);
h = sz.height;
}
if (time_format != "") {
var text = new Text (time + (horizontal ? "_" : ""), font_style);
var sz = text.get_size(chart.ctx);
var text = new Text (chart, time + (horizontal ? "_" : ""), font_style);
var sz = text.size;
max_rec_width = double.max (max_rec_width, sz.width);
h += sz.height;
}

8
src/Chart.vala
View File

@ -43,7 +43,7 @@ namespace CairoChart {
/**
* ``Chart`` Title.
*/
public Text title = new Text("Cairo Chart");
public Text title;
/**
* Legend.
@ -99,6 +99,8 @@ namespace CairoChart {
*/
public Chart () {
cursors = new Cursors (this);
title = new Text(this, "Cairo Chart");
}
/**
@ -336,13 +338,13 @@ namespace CairoChart {
ctx.stroke ();
}
protected virtual void draw_title () {
var sz = title.get_size(ctx);
var sz = title.size;
var title_height = sz.height + title.vspacing * 2;
evarea.y0 += title_height;
evarea.height -= title_height;
color = title.color;
ctx.move_to (area.width/2 - sz.width/2, sz.height + title.vspacing);
title.show(ctx);
title.show();
}
protected virtual void draw_haxes () {
for (var si = series.length - 1, nskip = 0; si >=0; --si)

62
src/Cursor.vala
View File

@ -209,15 +209,15 @@ namespace CairoChart {
size = Point128 ();
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);
var date_t = new Text(chart, date, s.axis_x.font_style, s.axis_x.color);
var time_t = new Text(chart, time, s.axis_x.font_style, s.axis_x.color);
var x_t = new Text(chart, s.axis_x.format.printf((LongDouble)p.x), s.axis_x.font_style, s.axis_x.color);
var y_t = new Text(chart, 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.ctx); size.x = sz.width; h_x = sz.height; }
if (show_date) { var sz = date_t.get_size(chart.ctx); size.x = sz.width; h_x = sz.height; }
if (show_time) { var sz = time_t.get_size(chart.ctx); size.x = double.max(size.x, sz.width); h_x += sz.height; }
if (show_y) { var sz = y_t.get_size(chart.ctx); size.x += sz.width; h_y = sz.height; }
if (show_x) { var sz = x_t.size; size.x = sz.width; h_x = sz.height; }
if (show_date) { var sz = date_t.size; size.x = sz.width; h_x = sz.height; }
if (show_time) { var sz = time_t.size; size.x = double.max(size.x, sz.width); h_x += sz.height; }
if (show_y) { var sz = y_t.size; 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_spacing, s.axis_y.font_spacing);
if (show_date && show_time) h_x += s.axis_x.font_spacing;
size.y = double.max (h_x, h_y);
@ -287,16 +287,16 @@ namespace CairoChart {
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;
}
var text_t = new Text(text, s.axis_x.font_style, s.axis_x.color);
var sz = text_t.get_size(chart.ctx);
var time_text_t = new Text(time_text, s.axis_x.font_style, s.axis_x.color);
var text_t = new Text(chart, text, s.axis_x.font_style, s.axis_x.color);
var sz = text_t.size;
var time_text_t = new Text(chart, 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.area.y1 - s.axis_x.font_spacing
- (chart.legend.position == Legend.Position.BOTTOM ? chart.legend.height : 0);
break;
case Axis.Position.HIGH:
var title_height = chart.title.get_height(chart.ctx) + (chart.legend.position == Legend.Position.TOP ?
var title_height = chart.title.height + (chart.legend.position == Legend.Position.TOP ?
chart.title.vspacing * 2 : chart.title.vspacing);
print_y = chart.area.y0 + title_height + s.axis_x.font_spacing
+ (chart.legend.position == Legend.Position.TOP ? chart.legend.height : 0);
@ -306,7 +306,7 @@ namespace CairoChart {
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.ctx))
+ (s.axis_x.time_format == "" ? 0 : time_text_t.height)
+ (s.axis_x.date_format == "" || s.axis_x.time_format == "" ? 0 : s.axis_x.font_spacing);
break;
}
@ -317,13 +317,13 @@ namespace CairoChart {
switch (s.axis_x.type) {
case Axis.Type.NUMBERS:
text_t.show(chart.ctx);
text_t.show();
break;
case Axis.Type.DATE_TIME:
if (s.axis_x.date_format != "") text_t.show(chart.ctx);
if (s.axis_x.date_format != "") text_t.show();
print_x = s.compact_rec_x_pos (x, time_text_t);
chart.ctx.move_to (print_x, print_y - (s.axis_x.date_format == "" ? 0 : sz.height + s.axis_x.font_spacing));
if (s.axis_x.time_format != "") time_text_t.show(chart.ctx);
if (s.axis_x.time_format != "") time_text_t.show();
break;
}
}
@ -337,7 +337,7 @@ namespace CairoChart {
if (chart.joint_y) {
var s = chart.series[chart.zoom_1st_idx];
var y = s.get_real_y(rel2scr_y(c.y));
var text_t = new Text(s.axis_y.format.printf((LongDouble)y, s.axis_y.font_style));
var text_t = new Text(chart, s.axis_y.format.printf((LongDouble)y, s.axis_y.font_style));
var print_y = s.compact_rec_y_pos (y, text_t);
var print_x = 0.0;
switch (s.axis_y.position) {
@ -346,12 +346,12 @@ namespace CairoChart {
+ (chart.legend.position == Legend.Position.LEFT ? chart.legend.width : 0);
break;
case Axis.Position.HIGH:
print_x = chart.area.x1 - text_t.get_width(chart.ctx) - s.axis_y.font_spacing
print_x = chart.area.x1 - text_t.width - s.axis_y.font_spacing
- (chart.legend.position == Legend.Position.RIGHT ? chart.legend.width : 0);
break;
}
chart.ctx.move_to (print_x, print_y);
text_t.show(chart.ctx);
text_t.show();
}
break;
}
@ -375,45 +375,45 @@ namespace CairoChart {
if (show_x) {
chart.color = s.axis_x.color;
var text_t = new Text(s.axis_x.format.printf((LongDouble)point.x), s.axis_x.font_style);
chart.ctx.move_to (svp.x - size.x / 2, svp.y + text_t.get_height(chart.ctx) / 2);
var text_t = new Text(chart, s.axis_x.format.printf((LongDouble)point.x), s.axis_x.font_style);
chart.ctx.move_to (svp.x - size.x / 2, svp.y + text_t.height / 2);
if (chart.joint_x) chart.color = chart.joint_color;
text_t.show(chart.ctx);
text_t.show();
}
if (show_time) {
chart.color = 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.ctx);
var text_t = new Text(chart, time, s.axis_x.font_style);
var sz = text_t.size;
var y = svp.y + sz.height / 2;
if (show_date) y -= sz.height / 2 + s.axis_x.font_spacing / 2;
chart.ctx.move_to (svp.x - size.x / 2, y);
if (chart.joint_x) chart.color = chart.joint_color;
text_t.show(chart.ctx);
text_t.show();
}
if (show_date) {
chart.color = 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.ctx);
var text_t = new Text(chart, date, s.axis_x.font_style);
var sz = text_t.size;
var y = svp.y + sz.height / 2;
if (show_time) y += sz.height / 2 + s.axis_x.font_spacing / 2;
chart.ctx.move_to (svp.x - size.x / 2, y);
if (chart.joint_x) chart.color = chart.joint_color;
text_t.show(chart.ctx);
text_t.show();
}
if (show_y) {
chart.color = 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.ctx);
var text_t = new Text(chart, s.axis_y.format.printf((LongDouble)point.y), s.axis_y.font_style);
var sz = text_t.size;
chart.ctx.move_to (svp.x + size.x / 2 - sz.width, svp.y + sz.height / 2);
if (chart.joint_y) chart.color = chart.joint_color;
text_t.show(chart.ctx);
text_t.show();
}
}
}

6
src/Legend.vala
View File

@ -52,7 +52,7 @@ namespace CairoChart {
switch (position) {
case Position.TOP:
x0 = (chart.area.width - width) / 2;
var title_height = chart.title.get_height(chart.ctx) + (chart.legend.position == Legend.Position.TOP ?
var title_height = chart.title.height + (chart.legend.position == Legend.Position.TOP ?
chart.title.vspacing * 2 : chart.title.vspacing);
y0 = title_height;
break;
@ -115,7 +115,7 @@ namespace CairoChart {
if (!s.zoom_show) continue;
var title_sz = s.title.get_size(chart.ctx);
var title_sz = s.title.size;
// carry
switch (position) {
@ -147,7 +147,7 @@ namespace CairoChart {
// series title
chart.ctx.move_to (x + line_length, y);
chart.color = s.title.color;
s.title.show(chart.ctx);
s.title.show();
// series line style
chart.ctx.move_to (x, y - title_sz.height / 2);

63
src/Series.vala
View File

@ -12,11 +12,11 @@ namespace CairoChart {
}
public Sort sort = Sort.BY_X;
public Axis axis_x = new Axis();
public Axis axis_y = new Axis();
public Axis axis_x;
public Axis axis_y;
public Place place = new Place();
public Text title = new Text ();
public Text title;
public Marker marker = null;
public Grid grid = new Grid ();
@ -45,6 +45,9 @@ namespace CairoChart {
public Series (Chart chart) {
this.chart = chart;
title = new Text(chart);
axis_x = new Axis(chart);
axis_y = new Axis(chart);
this.marker = new Marker(chart);
}
@ -124,8 +127,8 @@ namespace CairoChart {
double max_rec_width = 0; double max_rec_height = 0;
axis.calc_rec_sizes (chart, out max_rec_width, out max_rec_height, is_x);
var max_font_spacing = axis.font_spacing;
var max_axis_font_width = axis.title.text == "" ? 0 : axis.title.get_width(chart.ctx) + axis.font_spacing;
var max_axis_font_height = axis.title.text == "" ? 0 : axis.title.get_height(chart.ctx) + axis.font_spacing;
var max_axis_font_width = axis.title.text == "" ? 0 : axis.title.width + axis.font_spacing;
var max_axis_font_height = axis.title.text == "" ? 0 : axis.title.height + axis.font_spacing;
if (is_x)
s.join_relative_x_axes (si, true, ref max_rec_width, ref max_rec_height, ref max_font_spacing, ref max_axis_font_height, ref nskip);
@ -200,7 +203,7 @@ namespace CairoChart {
max_rec_height = double.max (max_rec_height, tmp_max_rec_height);
max_font_spacing = double.max (max_font_spacing, s2.axis_x.font_spacing);
max_axis_font_height = double.max (max_axis_font_height, s2.axis_x.title.text == "" ? 0 :
s2.axis_x.title.get_height(chart.ctx) + this.axis_x.font_spacing);
s2.axis_x.title.height + this.axis_x.font_spacing);
}
++nskip;
} else {
@ -237,7 +240,7 @@ namespace CairoChart {
max_rec_height = double.max (max_rec_height, tmp_max_rec_height);
max_font_spacing = double.max (max_font_spacing, s2.axis_y.font_spacing);
max_axis_font_width = double.max (max_axis_font_width, s2.axis_y.title.text == "" ? 0
: s2.axis_y.title.get_width(chart.ctx) + this.axis_y.font_spacing);
: s2.axis_y.title.width + this.axis_y.font_spacing);
++nskip;
} else {
break;
@ -259,8 +262,8 @@ namespace CairoChart {
case Axis.Type.DATE_TIME: axis_x.format_date_time(x, out text, out time_text); break;
}
var scr_x = get_scr_x (x);
var text_t = new Text(text, axis_x.font_style, axis_x.color);
var sz = axis_x.title.get_size(ctx);
var text_t = new Text(chart, text, axis_x.font_style, axis_x.color);
var sz = axis_x.title.size;
switch (axis_x.position) {
case Axis.Position.LOW:
@ -269,14 +272,14 @@ namespace CairoChart {
ctx.move_to (print_x, print_y);
switch (axis_x.type) {
case Axis.Type.NUMBERS:
text_t.show(ctx);
text_t.show();
break;
case Axis.Type.DATE_TIME:
if (axis_x.date_format != "") text_t.show(ctx);
var time_text_t = new Text(time_text, axis_x.font_style, axis_x.color);
if (axis_x.date_format != "") text_t.show();
var time_text_t = new Text(chart, time_text, axis_x.font_style, axis_x.color);
print_x = compact_rec_x_pos (x, time_text_t);
ctx.move_to (print_x, print_y - (axis_x.date_format == "" ? 0 : text_t.get_height(ctx) + axis_x.font_spacing));
if (axis_x.time_format != "") time_text_t.show(ctx);
ctx.move_to (print_x, print_y - (axis_x.date_format == "" ? 0 : text_t.height + axis_x.font_spacing));
if (axis_x.time_format != "") time_text_t.show();
break;
}
// 6. Draw grid lines to the place.zy0.
@ -297,14 +300,14 @@ namespace CairoChart {
switch (axis_x.type) {
case Axis.Type.NUMBERS:
text_t.show(ctx);
text_t.show();
break;
case Axis.Type.DATE_TIME:
if (axis_x.date_format != "") text_t.show(ctx);
var time_text_t = new Text(time_text, axis_x.font_style, axis_x.color);
if (axis_x.date_format != "") text_t.show();
var time_text_t = new Text(chart, time_text, axis_x.font_style, axis_x.color);
print_x = compact_rec_x_pos (x, time_text_t);
ctx.move_to (print_x, print_y - (axis_x.date_format == "" ? 0 : text_t.get_height(ctx) + axis_x.font_spacing));
if (axis_x.time_format != "") time_text_t.show(ctx);
ctx.move_to (print_x, print_y - (axis_x.date_format == "" ? 0 : text_t.height + axis_x.font_spacing));
if (axis_x.time_format != "") time_text_t.show();
break;
}
// 6. Draw grid lines to the place.zy1.
@ -360,7 +363,7 @@ namespace CairoChart {
}
}
var sz = s.axis_x.title.get_size(chart.ctx);
var sz = s.axis_x.title.size;
// 4.5. Draw Axis title
if (s.axis_x.title.text != "") {
@ -373,7 +376,7 @@ namespace CairoChart {
chart.ctx.move_to(scr_x - sz.width / 2.0, scr_y);
chart.color = s.axis_x.color;
if (chart.joint_x) chart.color = chart.joint_color;
s.axis_x.title.show(chart.ctx);
s.axis_x.title.show();
}
s.draw_horizontal_records (step, max_rec_height, x_min);
@ -402,16 +405,16 @@ namespace CairoChart {
else chart.color = axis_y.color;
var text = axis_y.format.printf((LongDouble)y);
var scr_y = get_scr_y (y);
var text_t = new Text(text, axis_y.font_style, axis_y.color);
var text_sz = text_t.get_size(ctx);
var sz = axis_y.title.get_size(ctx);
var text_t = new Text(chart, text, axis_y.font_style, axis_y.color);
var text_sz = text_t.size;
var sz = axis_y.title.size;
switch (axis_y.position) {
case Axis.Position.LOW:
ctx.move_to (chart.evarea.x0 + max_rec_width - text_sz.width + axis_y.font_spacing
+ (axis_y.title.text == "" ? 0 : sz.width + axis_y.font_spacing),
compact_rec_y_pos (y, text_t));
text_t.show(ctx);
text_t.show();
// 6. Draw grid lines to the place.zx0.
var line_style = grid.line_style;
if (joint_y) line_style.color = Color(0, 0, 0, 0.5);
@ -427,7 +430,7 @@ namespace CairoChart {
ctx.move_to (chart.evarea.x1 - text_sz.width - axis_y.font_spacing
- (axis_y.title.text == "" ? 0 : sz.width + axis_y.font_spacing),
compact_rec_y_pos (y, text_t));
text_t.show(ctx);
text_t.show();
// 6. Draw grid lines to the place.zx1.
var line_style = grid.line_style;
if (joint_y) line_style.color = Color(0, 0, 0, 0.5);
@ -480,7 +483,7 @@ namespace CairoChart {
}
}
var sz = s.axis_y.title.get_size(chart.ctx);
var sz = s.axis_y.title.size;
// 4.5. Draw Axis title
if (s.axis_y.title.text != "") {
@ -497,7 +500,7 @@ namespace CairoChart {
}
chart.color = s.axis_y.color;
if (chart.joint_y) chart.color = chart.joint_color;
s.axis_y.title.show(chart.ctx);
s.axis_y.title.show();
}
s.draw_vertical_records (step, max_rec_width, y_min);
@ -517,13 +520,13 @@ namespace CairoChart {
}
public virtual double compact_rec_x_pos (Float128 x, Text text) {
var sz = text.get_size(chart.ctx);
var sz = text.size;
return get_scr_x(x) - sz.width / 2.0
- sz.width * (x - (axis_x.range.zmin + axis_x.range.zmax) / 2.0) / axis_x.range.zrange;
}
public virtual double compact_rec_y_pos (Float128 y, Text text) {
var sz = text.get_size(chart.ctx);
var sz = text.size;
return get_scr_y(y) + sz.height / 2.0
+ sz.height * (y - (axis_y.range.zmin + axis_y.range.zmax) / 2.0) / axis_y.range.zrange;
}

140
src/Text.vala
View File

@ -1,10 +1,40 @@
namespace CairoChart {
/**
* ``CairoChart`` Text.
*/
public class Text {
Chart chart = null;
/**
* ``Text`` string.
*/
public string text = "";
/**
* ``Text`` font style.
*/
public Font style = Font ();
/**
* ``Text`` color.
*/
public Color color = Color();
/**
* Vertical spacing.
*/
public double vspacing = 4;
/**
* Horizontal spacing.
*/
public double hspacing = 4;
/**
* Both vertical & horizontal spacing (set only).
*/
public double spacing {
protected get {
return 0;
@ -15,78 +45,130 @@ namespace CairoChart {
default = 4;
}
public virtual Cairo.TextExtents get_extents (Cairo.Context ctx) {
ctx.select_font_face (style.family, style.slant, style.weight);
ctx.set_font_size (style.size);
Cairo.TextExtents extents;
ctx.text_extents (text, out extents);
return extents;
/**
* Cairo ``Text`` extents.
*/
public virtual Cairo.TextExtents ext {
get {
chart.ctx.select_font_face (style.family, style.slant, style.weight);
chart.ctx.set_font_size (style.size);
Cairo.TextExtents ext;
chart.ctx.text_extents (text, out ext);
return ext;
}
protected set {
}
}
public virtual double get_width (Cairo.Context ctx) {
var extents = get_extents (ctx);
/**
* ``Text`` width.
*/
public virtual double width {
get {
switch (style.orient) {
case Gtk.Orientation.HORIZONTAL: return extents.width;
case Gtk.Orientation.VERTICAL: return extents.height;
case Gtk.Orientation.HORIZONTAL: return ext.width;
case Gtk.Orientation.VERTICAL: return ext.height;
default: return 0.0;
}
}
protected set {
}
}
public virtual double get_height (Cairo.Context ctx) {
var extents = get_extents (ctx);
/**
* ``Text`` height.
*/
public virtual double height {
get {
switch (style.orient) {
case Gtk.Orientation.HORIZONTAL: return extents.height;
case Gtk.Orientation.VERTICAL: return extents.width;
case Gtk.Orientation.HORIZONTAL: return ext.height;
case Gtk.Orientation.VERTICAL: return ext.width;
default: return 0.0;
}
}
protected set {
}
}
/**
* ``Text`` size.
*/
public struct Size {
/**
* ``Text`` width.
*/
double width;
/**
* ``Text`` height.
*/
double height;
}
public virtual Size get_size (Cairo.Context ctx) {
/**
* ``Text`` @{link Size}.
*/
public virtual Size size {
get {
var sz = Size();
var extents = get_extents (ctx);
var e = ext;
switch (style.orient) {
case Gtk.Orientation.HORIZONTAL:
sz.width = extents.width + extents.x_bearing;
sz.height = extents.height;
sz.width = e.width + e.x_bearing;
sz.height = e.height;
break;
case Gtk.Orientation.VERTICAL:
sz.width = extents.height; // + extents.x_bearing ?
sz.height = extents.width; // +- extents.y_bearing ?
sz.width = e.height; // + e.x_bearing ?
sz.height = e.width; // +- e.y_bearing ?
break;
}
return sz;
}
protected set {
}
}
public virtual void show (Cairo.Context ctx) {
ctx.select_font_face(style.family,
/**
* Show ``Text``.
*/
public virtual void show () {
chart.ctx.select_font_face(style.family,
style.slant,
style.weight);
ctx.set_font_size(style.size);
chart.ctx.set_font_size(style.size);
if (style.orient == Gtk.Orientation.VERTICAL) {
ctx.rotate(- GLib.Math.PI / 2.0);
ctx.show_text(text);
ctx.rotate(GLib.Math.PI / 2.0);
chart.ctx.rotate(- GLib.Math.PI / 2.0);
chart.ctx.show_text(text);
chart.ctx.rotate(GLib.Math.PI / 2.0);
} else {
ctx.show_text(text);
chart.ctx.show_text(text);
}
}
public Text (string text = "",
/**
* Constructs a new ``Text``.
* @param chart ``Chart`` instance.
* @param text ``Text`` string.
* @param style ``Text`` font style.
* @param color ``Text`` color.
*/
public Text (Chart chart,
string text = "",
Font style = Font(),
Color color = Color()
) {
this.chart = chart;
this.text = text;
this.style = style;
this.color = color;
}
/**
* Gets a copy of the ``Text``.
*/
public virtual Text copy () {
var text = new Text ();
var text = new Text (chart);
text.chart = this.chart;
text.text = this.text;
text.style = this.style;
text.color = this.color;

84
test/ChartTest.vala
View File

@ -5,13 +5,13 @@ void plot_chart1 (Chart chart) {
var s2 = new Series (chart);
var s3 = new Series (chart);
s1.title = new Text("Series 1"); s1.color = Color (1, 0, 0);
s1.title = new Text(chart, "Series 1"); s1.color = Color (1, 0, 0);
s1.points = {Point128(0, 0), Point128(2, 1), Point128(1, 3)};
s1.axis_x.position = Axis.Position.HIGH;
s1.axis_x.format = "%.3Lf";
s2.title = new Text("Series 2"); s2.color = Color (0, 1, 0);
s2.title = new Text(chart, "Series 2"); s2.color = Color (0, 1, 0);
s2.points = {Point128(5, -3), Point128(25, -18), Point128(-11, 173)};
s3.title = new Text("Series 3"); s3.color = Color (0, 0, 1);
s3.title = new Text(chart, "Series 3"); s3.color = Color (0, 0, 1);
s3.points = {Point128(9, 17), Point128(2, 10), Point128(122, 31)};
s3.axis_y.position = Axis.Position.HIGH;
@ -34,12 +34,12 @@ void plot_chart1 (Chart chart) {
s2.marker.type = Marker.Type.CIRCLE;
s3.marker.type = Marker.Type.PRICLE_TRIANGLE;
s1.axis_x.title = new Text("Series 1: Axis X.");
s1.axis_y.title = new Text("Series 1: Axis Y.");
s2.axis_x.title = new Text("Series 2: Axis X.");
s2.axis_y.title = new Text("Series 2: Axis Y.");
s3.axis_x.title = new Text("Series 3: Axis X.");
s3.axis_y.title = new Text("Series 3: Axis Y.");
s1.axis_x.title = new Text(chart, "Series 1: Axis X.");
s1.axis_y.title = new Text(chart, "Series 1: Axis Y.");
s2.axis_x.title = new Text(chart, "Series 2: Axis X.");
s2.axis_y.title = new Text(chart, "Series 2: Axis Y.");
s3.axis_x.title = new Text(chart, "Series 3: Axis X.");
s3.axis_y.title = new Text(chart, "Series 3: Axis Y.");
chart.series = { s1, s2, s3 };
}
@ -49,13 +49,13 @@ void plot_chart2 (Chart chart) {
var s2 = new Series (chart);
var s3 = new Series (chart);
s1.title = new Text("Series 1"); s1.color = Color (1, 0, 0);
s1.title = new Text(chart, "Series 1"); s1.color = Color (1, 0, 0);
s1.points = {Point128(-12, 0), Point128(2, 1), Point128(20, 3)};
s2.axis_y.position = Axis.Position.HIGH;
s1.axis_x.format = "%.3Lf";
s2.title = new Text("Series 2"); s2.color = Color (0, 1, 0);
s2.title = new Text(chart, "Series 2"); s2.color = Color (0, 1, 0);
s2.points = {Point128(5, -3), Point128(25, -18), Point128(-11, 173)};
s3.title = new Text("Series 3"); s3.color = Color (0, 0, 1);
s3.title = new Text(chart, "Series 3"); s3.color = Color (0, 0, 1);
s3.points = {Point128(9, 17), Point128(2, 10), Point128(-15, 31)};
s3.axis_y.position = Axis.Position.HIGH;
@ -78,12 +78,12 @@ void plot_chart2 (Chart chart) {
s2.marker.type = Marker.Type.PRICLE_SQUARE;
s3.marker.type = Marker.Type.SQUARE;
s1.axis_x.title = new Text("All Series: Axis X.");
s1.axis_y.title = new Text("Series 1: Axis Y.");
s2.axis_x.title = new Text("All Series: Axis X.");
s2.axis_y.title = new Text("Series 2: Axis Y.");
s3.axis_x.title = new Text("All Series: Axis X.");
s3.axis_y.title = new Text("Series 3: Axis Y.");
s1.axis_x.title = new Text(chart, "All Series: Axis X.");
s1.axis_y.title = new Text(chart, "Series 1: Axis Y.");
s2.axis_x.title = new Text(chart, "All Series: Axis X.");
s2.axis_y.title = new Text(chart, "Series 2: Axis Y.");
s3.axis_x.title = new Text(chart, "All Series: Axis X.");
s3.axis_y.title = new Text(chart, "Series 3: Axis Y.");
//s1.axis_x.position = s2.axis_x.position = s3.axis_x.position = Axis.Position.HIGH;
//s1.axis_x.type = s2.axis_x.type = s3.axis_x.type = Axis.Type.DATE_TIME;
@ -97,15 +97,15 @@ void plot_chart3 (Chart chart) {
var s2 = new Series (chart);
var s3 = new Series (chart);
s1.title = new Text("Series 1"); s1.color = Color (1, 0, 0);
s1.title = new Text(chart, "Series 1"); s1.color = Color (1, 0, 0);
s1.points = {Point128(0, 70), Point128(2, 155), Point128(1, -3)};
s1.axis_x.position = Axis.Position.HIGH;
s1.axis_y.position = Axis.Position.HIGH;
s1.axis_x.format = "%.3Lf";
s2.title = new Text("Series 2"); s2.color = Color (0, 1, 0);
s2.title = new Text(chart, "Series 2"); s2.color = Color (0, 1, 0);
s2.points = {Point128(5, -3), Point128(25, -18), Point128(-11, 173)};
s2.axis_y.position = Axis.Position.HIGH;
s3.title = new Text("Series 3"); s3.color = Color (0, 0, 1);
s3.title = new Text(chart, "Series 3"); s3.color = Color (0, 0, 1);
s3.points = {Point128(9, -17), Point128(2, 10), Point128(122, 31)};
s3.axis_y.position = Axis.Position.HIGH;
@ -128,12 +128,12 @@ void plot_chart3 (Chart chart) {
s2.marker.type = Marker.Type.PRICLE_CIRCLE;
s3.marker.type = Marker.Type.TRIANGLE;
s1.axis_x.title = new Text("Series 1: Axis X.");
s1.axis_y.title = new Text("Series 1: Axis Y.");
s2.axis_x.title = new Text("Series 2: Axis X.");
s2.axis_y.title = new Text("Series 2: Axis Y.");
s3.axis_x.title = new Text("Series 3: Axis X.");
s3.axis_y.title = new Text("Series 3: Axis Y.");
s1.axis_x.title = new Text(chart, "Series 1: Axis X.");
s1.axis_y.title = new Text(chart, "Series 1: Axis Y.");
s2.axis_x.title = new Text(chart, "Series 2: Axis X.");
s2.axis_y.title = new Text(chart, "Series 2: Axis Y.");
s3.axis_x.title = new Text(chart, "Series 3: Axis X.");
s3.axis_y.title = new Text(chart, "Series 3: Axis Y.");
//s1.axis_y.position = s2.axis_y.position = s3.axis_y.position = Axis.Position.LOW;
@ -154,17 +154,17 @@ void plot_chart4 (Chart chart) {
var now = new DateTime.now_local().to_unix();
var high = (uint64) (253000000000L);
s1.title = new Text("Series 1"); s1.color = Color (1, 0, 0);
s1.title = new Text(chart, "Series 1"); s1.color = Color (1, 0, 0);
s1.points = {Point128(now, 70), Point128(now - 100000, 155), Point128(now + 100000, 30)};
s1.axis_x.position = Axis.Position.HIGH;
s1.axis_y.position = Axis.Position.HIGH;
s2.title = new Text("Series 2"); s2.color = Color (0, 1, 0);
s2.title = new Text(chart, "Series 2"); s2.color = Color (0, 1, 0);
s2.points = {Point128(5, -3), Point128(25, -18), Point128(-11, 173)};
s2.axis_y.position = Axis.Position.HIGH;
s3.title = new Text("Series 3"); s3.color = Color (0, 0, 1);
s3.title = new Text(chart, "Series 3"); s3.color = Color (0, 0, 1);
s3.points = {Point128(high - 2 + 0.73, -17), Point128(high - 1 + 0.234, 10), Point128(high + 1 + 0.411, 31)};
s3.axis_y.position = Axis.Position.HIGH;
s4.title = new Text("Series 4"); s4.color = Color (0.5, 0.3, 0.9);
s4.title = new Text(chart, "Series 4"); s4.color = Color (0.5, 0.3, 0.9);
s4.points = {Point128(high + 0.005, -19.05), Point128(high + 0.0051, 28), Point128(high + 0.0052, 55), Point128(high + 0.0053, 44)};
s4.axis_y.position = Axis.Position.HIGH;
@ -193,14 +193,14 @@ void plot_chart4 (Chart chart) {
s3.marker.type = Marker.Type.TRIANGLE;
s4.marker.type = Marker.Type.PRICLE_SQUARE;
s1.axis_x.title = new Text("Series 1: Axis X.");
s1.axis_y.title = new Text("Series 1: Axis Y.");
s2.axis_x.title = new Text("Series 2: Axis X.");
s2.axis_y.title = new Text("Series 2: Axis Y.");
s3.axis_x.title = new Text("Series 3: Axis X.");
s3.axis_y.title = new Text("Series 3: Axis Y.");
s4.axis_x.title = new Text("Series 4: Axis X.");
s4.axis_y.title = new Text("Series 4: Axis Y.");
s1.axis_x.title = new Text(chart, "Series 1: Axis X.");
s1.axis_y.title = new Text(chart, "Series 1: Axis Y.");
s2.axis_x.title = new Text(chart, "Series 2: Axis X.");
s2.axis_y.title = new Text(chart, "Series 2: Axis Y.");
s3.axis_x.title = new Text(chart, "Series 3: Axis X.");
s3.axis_y.title = new Text(chart, "Series 3: Axis Y.");
s4.axis_x.title = new Text(chart, "Series 4: Axis X.");
s4.axis_y.title = new Text(chart, "Series 4: Axis Y.");
chart.series = { s1, s2, s3, s4 };
}
@ -432,9 +432,9 @@ int main (string[] args) {
var str = chart.cursors.get_cursors_delta_str();
if (str != "") {
var text = "Δ = " + str;
var text_t = new Text(text);
var w = text_t.get_width(ctx);
var h = text_t.get_height(ctx);
var text_t = new Text(chart, text);
var w = text_t.width;
var h = text_t.height;
var x0 = chart.plarea.x1 - w - 5;
var y0 = chart.plarea.y0 + h + 5;
chart.color = chart.legend.bg_color;