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Cairo-Chart
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Kolan Sh 2018-01-18 17:20:06 +03:00
parent d3209aec5b
commit ebd7e17978
1 changed files with 47 additions and 47 deletions
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94
src/Chart.vala
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@ -103,7 +103,7 @@ namespace CairoChart {
}
/**
* TODO: remove it.
* TODO: remove all indent fields / evaluate automatically.
*/
public double title_indent = 4;
@ -136,17 +136,6 @@ namespace CairoChart {
return chart;
}
protected virtual void fix_evarea () {
if (evarea.width < 0) evarea.width = 0;
if (evarea.height < 0) evarea.height = 0;
}
protected virtual void set_vertical_axes_titles () {
for (var si = 0; si < series.length; ++si) {
var s = series[si];
s.axis_y.title.style.orientation = Font.Orientation.VERTICAL;
}
}
public virtual void clear () {
if (ctx != null) {
color = bg_color;
@ -154,7 +143,6 @@ namespace CairoChart {
color = Color (0, 0, 0, 1);
}
}
public virtual bool draw () {
evarea = area;
@ -188,45 +176,11 @@ namespace CairoChart {
return true;
}
protected virtual void draw_chart_title () {
var sz = title.get_size(ctx);
var title_height = sz.height + (legend.position == Legend.Position.TOP ? title_indent * 2 : title_indent);
evarea.y += title_height;
evarea.height -= title_height;
color = title.color;
ctx.move_to (area.width/2 - sz.width/2, sz.height + title_indent);
title.show(ctx);
}
public virtual void draw_selection (Cairo.Rectangle rect) {
selection_style.set(this);
ctx.rectangle (rect.x, rect.y, rect.width, rect.height);
ctx.stroke();
}
protected virtual void draw_horizontal_axes () {
for (var si = series.length - 1, nskip = 0; si >=0; --si)
series[si].draw_horizontal_axis (si, ref nskip);
}
protected virtual void draw_vertical_axes () {
for (var si = series.length - 1, nskip = 0; si >=0; --si)
series[si].draw_vertical_axis (si, ref nskip);
}
protected virtual void draw_plot_area_border () {
color = border_color;
ctx.set_dash(null, 0);
ctx.move_to (plarea.x, plarea.y);
ctx.line_to (plarea.x, plarea.y + plarea.height);
ctx.line_to (plarea.x + plarea.width, plarea.y + plarea.height);
ctx.line_to (plarea.x + plarea.width, plarea.y);
ctx.line_to (plarea.x, plarea.y);
ctx.stroke ();
}
protected virtual void draw_series () {
for (var si = 0; si < series.length; ++si) {
var s = series[si];
if (s.zoom_show && s.points.length != 0)
s.draw();
}
}
public virtual void zoom_in (Cairo.Rectangle rect) {
var x1 = rect.x + rect.width;
@ -324,6 +278,17 @@ namespace CairoChart {
zoom_in (Cairo.Rectangle(){x = xmin + d.x, y = ymin + d.y, width = xmax - xmin, height = ymax - ymin});
}
protected virtual void fix_evarea () {
if (evarea.width < 0) evarea.width = 0;
if (evarea.height < 0) evarea.height = 0;
}
protected virtual void set_vertical_axes_titles () {
for (var si = 0; si < series.length; ++si) {
var s = series[si];
s.axis_y.title.style.orientation = Font.Orientation.VERTICAL;
}
}
protected virtual void join_calc (bool is_x) {
for (var si = series.length - 1, nskip = 0; si >= 0; --si)
series[si].join_calc(is_x, si, ref nskip);
@ -350,6 +315,41 @@ namespace CairoChart {
join_calc (false);
}
protected virtual void draw_plot_area_border () {
color = border_color;
ctx.set_dash(null, 0);
ctx.move_to (plarea.x, plarea.y);
ctx.line_to (plarea.x, plarea.y + plarea.height);
ctx.line_to (plarea.x + plarea.width, plarea.y + plarea.height);
ctx.line_to (plarea.x + plarea.width, plarea.y);
ctx.line_to (plarea.x, plarea.y);
ctx.stroke ();
}
protected virtual void draw_chart_title () {
var sz = title.get_size(ctx);
var title_height = sz.height + (legend.position == Legend.Position.TOP ? title_indent * 2 : title_indent);
evarea.y += title_height;
evarea.height -= title_height;
color = title.color;
ctx.move_to (area.width/2 - sz.width/2, sz.height + title_indent);
title.show(ctx);
}
protected virtual void draw_horizontal_axes () {
for (var si = series.length - 1, nskip = 0; si >=0; --si)
series[si].draw_horizontal_axis (si, ref nskip);
}
protected virtual void draw_vertical_axes () {
for (var si = series.length - 1, nskip = 0; si >=0; --si)
series[si].draw_vertical_axis (si, ref nskip);
}
protected virtual void draw_series () {
for (var si = 0; si < series.length; ++si) {
var s = series[si];
if (s.zoom_show && s.points.length != 0)
s.draw();
}
}
protected virtual bool x_in_plot_area (double x) {
if (math.x_in_range(x, plarea.x, plarea.x + plarea.width))
return true;