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Cairo-Chart
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This commit is contained in:
Kolan Sh 2018-01-22 18:12:06 +03:00
parent d676040023
commit 5b8b712cea
4 changed files with 37 additions and 35 deletions
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2
src/Chart.vala
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@ -152,7 +152,7 @@ namespace CairoChart {
rot_axes_titles ();
cursors.get_crossings();
//cursors.get_crossings();
eval_plarea ();

50
src/Cursor.vala
View File

@ -2,12 +2,12 @@ namespace CairoChart {
public class Cursors {
public List<Point?> list = new List<Point?> ();
public Point active_cursor = Point(); // { get; protected set; default = Point128 (); }
public bool is_cursor_active = false; // { get; protected set; default = false; }
protected List<Point?> list = new List<Point?> ();
protected Point active_cursor = Point(); // { get; protected set; default = Point128 (); }
protected bool is_cursor_active = false; // { get; protected set; default = false; }
public Cursors.Style cursor_style = Cursors.Style();
public Cursors.CursorCrossings[] cursors_crossings = {};
protected Chart chart = null;
public Cursors.CursorCrossings[] crossings = {};
Chart chart;
public Cursors (Chart chart) {
this.chart = chart;
@ -19,16 +19,16 @@ namespace CairoChart {
c.active_cursor = active_cursor;
c.is_cursor_active = is_cursor_active;
c.cursor_style = cursor_style;
c.cursors_crossings = cursors_crossings;
c.crossings = crossings;
return c;
}
public enum Orientation {
protected enum Orientation {
VERTICAL = 0, // default
HORIZONTAL
}
public struct Style {
protected struct Style {
public Orientation orientation;
public double select_distance;
@ -57,26 +57,26 @@ namespace CairoChart {
CursorCross[] crossings;
}
public virtual void set_active_cursor (Point p, bool remove = false) {
public virtual void set_active (Point p, bool remove = false) {
active_cursor.x = chart.zoom.x0 + (p.x - chart.plarea.x0) / chart.plarea.width * chart.zoom.width;
active_cursor.y = chart.zoom.y1 - (chart.plarea.y1 - p.y) / chart.plarea.height * chart.zoom.height;
is_cursor_active = ! remove;
}
public virtual void add_active_cursor () {
public virtual void add_active () {
list.append (active_cursor);
is_cursor_active = false;
}
public virtual Float128 rel2scr_x(Float128 x) {
protected virtual Float128 rel2scr_x(Float128 x) {
return chart.plarea.x0 + chart.plarea.width * (x - chart.zoom.x0) / chart.zoom.width;
}
public virtual Float128 rel2scr_y(Float128 y) {
protected virtual Float128 rel2scr_y(Float128 y) {
return chart.plarea.y0 + chart.plarea.height * (y - chart.zoom.y0) / chart.zoom.height;
}
public virtual void remove_active_cursor () {
public virtual void remove_active () {
if (list.length() == 0) return;
var distance = 1024.0 * 1024;//width * width;
uint rm_indx = 0;
@ -105,7 +105,7 @@ namespace CairoChart {
return all_cursors;
}
public void get_crossings () {
protected void get_crossings () {
var all_cursors = get_all_cursors();
CursorCrossings[] local_cursor_crossings = {};
@ -158,14 +158,14 @@ namespace CairoChart {
local_cursor_crossings += ccs;
}
}
cursors_crossings = local_cursor_crossings;
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) {
for (var ccsi = 0, max_ccsi = crossings.length; ccsi < max_ccsi; ++ccsi) {
for (var cci = 0, max_cci = 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;
unowned CursorCross[] cr = crossings[ccsi].crossings;
cr[cci].scr_point = chart.series[cr[cci].series_index].get_scr_point (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);
@ -226,13 +226,15 @@ namespace CairoChart {
public virtual void draw () {
if (chart.series.length == 0) return;
get_crossings();
var all_cursors = get_all_cursors();
calc_cursors_value_positions();
for (var cci = 0, max_cci = cursors_crossings.length; cci < max_cci; ++cci) {
for (var cci = 0, max_cci = crossings.length; cci < max_cci; ++cci) {
var low = Point128(chart.plarea.x1, chart.plarea.y1); // low and high
var high = Point128(chart.plarea.x0, chart.plarea.y0); // points of the cursor
unowned CursorCross[] ccs = cursors_crossings[cci].crossings;
unowned CursorCross[] ccs = crossings[cci].crossings;
cursor_style.line_style.apply(chart);
for (var ci = 0, max_ci = ccs.length; ci < max_ci; ++ci) {
var si = ccs[ci].series_index;
@ -270,7 +272,7 @@ namespace CairoChart {
chart.ctx.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);
var c = all_cursors.nth_data(crossings[cci].cursor_index);
switch (cursor_style.orientation) {
case Orientation.VERTICAL:
@ -415,7 +417,7 @@ namespace CairoChart {
}
}
public bool get_cursors_delta (out Float128 delta) {
public bool get_delta (out Float128 delta) {
delta = 0;
if (chart.series.length == 0) return false;
if (list.length() + (is_cursor_active ? 1 : 0) != 2) return false;
@ -448,9 +450,9 @@ namespace CairoChart {
return false;
}
public string get_cursors_delta_str () {
public string get_delta_str () {
Float128 delta = 0;
if (!get_cursors_delta(out delta)) return "";
if (!get_delta(out delta)) return "";
var str = "";
var s = chart.series[chart.zoom_1st_idx];
if (chart.joint_x)

6
src/Series.vala
View File

@ -165,7 +165,7 @@ namespace CairoChart {
s.join_relative_y_axes (si, true, ref max_rec_width, ref max_rec_height, ref max_font_spacing, ref max_axis_font_width, ref nskip);
// for 4.2. Cursor values for joint X axis
if (si == chart.zoom_1st_idx && chart.cursors.cursors_crossings.length != 0) {
if (si == chart.zoom_1st_idx && chart.cursors.crossings.length != 0) {
switch (chart.cursors.cursor_style.orientation) {
case Cursors.Orientation.VERTICAL:
if (is_x && chart.joint_x) {
@ -383,7 +383,7 @@ namespace CairoChart {
if (x_min < s.axis_x.range.zmin) x_min += step;
// 4.2. Cursor values for joint X axis
if (chart.joint_x && chart.cursors.cursor_style.orientation == Cursors.Orientation.VERTICAL && chart.cursors.cursors_crossings.length != 0) {
if (chart.joint_x && chart.cursors.cursor_style.orientation == Cursors.Orientation.VERTICAL && chart.cursors.crossings.length != 0) {
var tmp = max_rec_height + s.axis_x.font.vspacing;
switch (s.axis_x.position) {
case Axis.Position.LOW: chart.evarea.y1 -= tmp; break;
@ -499,7 +499,7 @@ namespace CairoChart {
if (y_min < s.axis_y.range.zmin) y_min += step;
// 4.2. Cursor values for joint Y axis
if (chart.joint_y && chart.cursors.cursor_style.orientation == Cursors.Orientation.HORIZONTAL && chart.cursors.cursors_crossings.length != 0) {
if (chart.joint_y && chart.cursors.cursor_style.orientation == Cursors.Orientation.HORIZONTAL && chart.cursors.crossings.length != 0) {
var tmp = max_rec_width + s.axis_y.font.hspacing;
switch (s.axis_y.position) {
case Axis.Position.LOW: chart.evarea.x0 += tmp; break;

14
test/ChartTest.vala
View File

@ -458,7 +458,7 @@ int main (string[] args) {
chart.draw_selection (new Area.with_abs(sel_x0, sel_y0, sel_x1, sel_y1));
// show delta
var str = chart.cursors.get_cursors_delta_str();
var str = chart.cursors.get_delta_str();
if (str != "") {
var text = "Δ = " + str;
var text_t = new Text(chart, text);
@ -483,11 +483,11 @@ int main (string[] args) {
switch (event.button) {
case 1: // start cursor position selection
if ((event.state & Gdk.ModifierType.SHIFT_MASK) != 0) { // remove cursor
chart.cursors.set_active_cursor (Point(event.x, event.y), true);
chart.cursors.remove_active_cursor();
chart.cursors.set_active (Point(event.x, event.y), true);
chart.cursors.remove_active();
mouse_state = MouseState.FREE;
} else { // add cursor
chart.cursors.set_active_cursor (Point(event.x, event.y));
chart.cursors.set_active (Point(event.x, event.y));
mouse_state = MouseState.CURSOR_SELECTION;
}
da.queue_draw_area(0, 0, da.get_allocated_width(), da.get_allocated_height());
@ -515,11 +515,11 @@ int main (string[] args) {
switch (event.button) {
case 1: // start cursor position selection
if ((event.state & Gdk.ModifierType.SHIFT_MASK) != 0) { // remove cursor
//chart.remove_active_cursor ();
//chart.remove_active ();
//da.queue_draw_area(0, 0, da.get_allocated_width(), da.get_allocated_height());
//mouse_state = MouseState.FREE;
} else { // add cursor
chart.cursors.add_active_cursor ();
chart.cursors.add_active ();
mouse_state = MouseState.FREE;
}
break;
@ -561,7 +561,7 @@ int main (string[] args) {
break;
case MouseState.CURSOR_SELECTION:
chart.cursors.set_active_cursor (Point(event.x, event.y));
chart.cursors.set_active (Point(event.x, event.y));
da.queue_draw_area(0, 0, da.get_allocated_width(), da.get_allocated_height());
break;
}