273 lines
10 KiB
JavaScript
273 lines
10 KiB
JavaScript
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/*
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* This file is part of Toolkit.
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*
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* Toolkit is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* Toolkit is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU General
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* Public License along with this program; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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"use strict";
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(function(w, TK) {
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function draw_lines(a, mode, last) {
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var labels = new Array(a.length);
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var coords = new Array(a.length);
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var i, label, obj;
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for (i = 0; i < a.length; i++) {
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obj = a[i];
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if (obj.label) {
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label = TK.make_svg("text");
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label.textContent = obj.label;
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label.style["dominant-baseline"] = "central";
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TK.add_class(label, "toolkit-grid-label");
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TK.add_class(label, mode ? "toolkit-horizontal" : "toolkit-vertical");
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if (obj["class"]) TK.add_class(label, obj["class"]);
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this.element.appendChild(label);
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labels[i] = label;
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}
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}
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var w = this.range_x.options.basis;
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var h = this.range_y.options.basis;
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TK.S.add(function() {
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/* FORCE_RELAYOUT */
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for (i = 0; i < a.length; i++) {
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obj = a[i];
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label = labels[i];
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if (!label) continue;
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var bb;
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try {
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bb = label.getBBox();
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} catch(e) {
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// if we are hidden, this may throw
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// we should force redraw at some later point, but
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// its hard to do. the grid should really be deactivated
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// by an option.
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continue;
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}
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var tw = bb.width;
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var th = bb.height;
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var p = TK.get_style(label, "padding").split(" ");
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if (p.length < 2)
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p[1] = p[2] = p[3] = p[0];
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if (p.length < 3) {
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p[2] = p[0];
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p[3] = p[1];
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}
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if (p.length < 4)
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p[3] = p[1];
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var pt = parseInt(p[0]) || 0;
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var pr = parseInt(p[1]) || 0;
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var pb = parseInt(p[2]) || 0;
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var pl = parseInt(p[3]) || 0;
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var x, y;
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if (mode) {
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y = Math.max(th / 2, Math.min(h - th / 2 - pt, this.range_y.val2px(obj.pos)));
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if (y > last) continue;
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x = w - tw - pl;
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coords[i] = {
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x : x,
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y : y,
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m : tw + pl + pr,
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};
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last = y - th;
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} else {
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x = Math.max(pl, Math.min(w - tw - pl, this.range_x.val2px(obj.pos) - tw / 2));
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if (x < last) continue;
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y = h-th/2-pt;
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coords[i] = {
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x : x,
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y : y,
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m : th + pt + pb,
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};
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last = x + tw;
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}
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}
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TK.S.add(function() {
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for (i = 0; i < a.length; i++) {
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label = labels[i];
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if (label) {
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obj = coords[i];
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if (obj) {
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label.setAttribute("x", obj.x);
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label.setAttribute("y", obj.y);
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} else {
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if (label.parentElement == this.element)
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this.element.removeChild(label);
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}
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}
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}
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for (i = 0; i < a.length; i++) {
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obj = a[i];
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label = coords[i];
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var m;
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if (label) m = label.m;
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else m = 0;
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if ((mode && obj.pos === this.range_y.options.min)
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|| ( mode && obj.pos === this.range_y.options.max)
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|| (!mode && obj.pos === this.range_x.options.min)
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|| (!mode && obj.pos === this.range_x.options.max))
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continue;
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var line = TK.make_svg("path");
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TK.add_class(line, "toolkit-grid-line");
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TK.add_class(line, mode ? "toolkit-horizontal" : "toolkit-vertical");
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if (obj["class"]) TK.add_class(line, obj["class"]);
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if (obj.color) line.setAttribute("style", "stroke:" + obj.color);
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if (mode) {
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// line from left to right
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line.setAttribute("d", "M0 " + Math.round(this.range_y.val2px(obj.pos))
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+ ".5 L" + (this.range_x.options.basis - m) + " "
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+ Math.round(this.range_y.val2px(obj.pos)) + ".5");
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} else {
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// line from top to bottom
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line.setAttribute("d", "M" + Math.round(this.range_x.val2px(obj.pos))
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+ ".5 0 L" + Math.round(this.range_x.val2px(obj.pos))
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+ ".5 " + (this.range_y.options.basis - m));
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}
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this.element.appendChild(line);
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}
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}.bind(this), 1);
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}.bind(this));
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}
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TK.Grid = TK.class({
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/**
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* TK.Grid creates a couple of lines and labels in a SVG
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* image on the x and y axis. It is used in e.g. {@link TK.Graph} and
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* {@link TK.FrequencyResponse} to draw markers and values. TK.Grid needs a
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* parent SVG image do draw into. The base element of a TK.Grid is a
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* SVG group containing all the labels and lines.
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*
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* @class TK.Grid
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*
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* @param {Object} [options={ }] - An object containing initial options.
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*
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* @property {Array<Object>} [options.grid_x=[]] - Array for vertical grid line definitions with the members:
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* @property {Number} [options.grid_x.pos] - The value where to draw grid line and correspon ding label.
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* @property {String} [options.grid_x.color] - A valid CSS color string to colorize the elements.
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* @property {String} [options.grid_x.class] - A class name for the elements.
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* @property {String} [options.grid_x.label] - A label string.
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* @property {Array<Object>} [options.grid_y=[]] - Array for horizontal grid lines with the members:
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* @property {Number} [options.grid_y.pos] - The value where to draw grid line and corresponding label.
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* @property {String} [options.grid_y.color] - A valid CSS color string to colorize the elements.
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* @property {String} [options.grid_y.class] - A class name for the elements.
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* @property {String} [options.grid_y.label] - A label string.
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* @property {Function|Object} [options.range_x={}] - A function returning
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* a {@link TK.Range} instance for vertical grid lines or an object
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* containing options. for a new {@link Range}.
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* @property {Function|Object} [options.range_y={}] - A function returning
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* a {@link TK.Range} instance for horizontal grid lines or an object
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* containing options. for a new {@link Range}.
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* @property {Number} [options.width=0] - Width of the grid.
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* @property {Number} [options.height=0] - Height of the grid.
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*
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* @extends TK.Widget
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*
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* @mixes TK.Ranges
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*/
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_class: "Grid",
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Extends: TK.Widget,
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Implements: TK.Ranges,
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_options: Object.assign(Object.create(TK.Widget.prototype._options), {
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grid_x: "array",
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grid_y: "array",
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range_x: "object",
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range_y: "object",
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width: "number",
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height: "number",
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}),
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options: {
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grid_x: [],
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grid_y: [],
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range_x: {},
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range_y: {},
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width: 0,
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height: 0
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},
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initialize: function (options) {
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TK.Widget.prototype.initialize.call(this, options);
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/**
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* @member {SVGGroup} TK.Grid#element - The main SVG group containing all grid elements. Has class <code>toolkit-grid</code>.
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*/
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this.element = this.widgetize(
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TK.make_svg("g", {"class": "toolkit-grid"}), true, true, true);
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/**
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* @member {TK.Range} TK.Grid#range_x - The range for the x axis.
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*/
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/**
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* @member {TK.Range} TK.Grid#range_y - The range for the y axis.
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*/
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this.add_range(this.options.range_x, "range_x");
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this.add_range(this.options.range_y, "range_y");
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if (this.options.width)
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this.set("width", this.options.width);
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if (this.options.height)
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this.set("height", this.options.width);
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this.invalidate_ranges = function (key, value) {
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this.invalid.range_x = true;
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this.invalid.range_y = true;
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this.trigger_draw();
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}.bind(this);
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this.range_x.add_event("set", this.invalidate_ranges);
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this.range_y.add_event("set", this.invalidate_ranges);
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},
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redraw: function () {
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var I = this.invalid, O = this.options;
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if (I.validate("grid_x", "grid_y", "range_x", "range_y")) {
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TK.empty(this.element);
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draw_lines.call(this, O.grid_x, false, 0);
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draw_lines.call(this, O.grid_y, true, this.range_y.options.basis);
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}
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TK.Widget.prototype.redraw.call(this);
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},
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destroy: function () {
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this.range_x.remove_event("set", this.invalidate_ranges);
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this.range_y.remove_event("set", this.invalidate_ranges);
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TK.Widget.prototype.destroy.call(this);
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},
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// GETTER & SETTER
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set: function (key, value) {
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this.options[key] = value;
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switch (key) {
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case "grid_x":
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case "grid_y":
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/**
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* Is fired when the grid has changed.
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*
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* @event TK.Grid#gridchanged
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*
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* @param {Array} grid_x - The grid elements for x axis.
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* @param {Array} grid_y - The grid elements for y axis.
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*/
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this.fire_event("gridchanged", this.options.grid_x, this.options.grid_y);
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break;
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case "width":
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this.range_x.set("basis", value);
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break;
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case "height":
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this.range_y.set("basis", value);
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break;
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}
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TK.Widget.prototype.set.call(this, key, value);
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}
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});
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})(this, this.TK);
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