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95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
/* spek-ruler.cc
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*
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* Copyright (C) 2010-2012 Alexander Kojevnikov <alexander@kojevnikov.com>
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*
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* Spek is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Spek 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Spek. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <cmath>
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#include "spek-ruler.hh"
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SpekRuler::SpekRuler(
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int x, int y, Position pos, wxString sample_label,
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int *factors, int units, double spacing,
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double scale, double offset, formatter_cb formatter)
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:
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x(x), y(y), pos(pos), sample_label(sample_label),
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factors(factors), units(units), spacing(spacing),
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scale(scale), offset(offset), formatter(formatter)
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{
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}
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void SpekRuler::draw(wxDC& dc)
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{
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// Mesure the sample label.
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wxSize size = dc.GetTextExtent(sample_label);
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int len = this->pos == TOP || this->pos == BOTTOM ? size.GetWidth() : size.GetHeight();
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// Select the factor to use, we want some space between the labels.
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int factor = 0;
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for (int i = 0; factors[i]; ++i) {
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if (fabs(this->scale * factors[i]) >= this->spacing * len) {
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factor = factors[i];
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break;
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}
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}
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// Draw the ticks.
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this->draw_tick(dc, 0);
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this->draw_tick(dc, units);
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if (factor > 0) {
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for (int tick = factor; tick < units; tick += factor) {
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if (fabs(this->scale * (units - tick)) < len * 1.2) {
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break;
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}
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this->draw_tick(dc, tick);
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}
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}
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}
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void SpekRuler::draw_tick(wxDC& dc, int tick)
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{
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double GAP = 10;
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double TICK_LEN = 4;
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wxString label = this->formatter(tick);
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int value = this->pos == TOP || this->pos == BOTTOM ? tick : this->units - tick;
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double p = this->offset + this->scale * value;
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wxSize size = dc.GetTextExtent(label);
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int w = size.GetWidth();
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int h = size.GetHeight();
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if (this->pos == TOP) {
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dc.DrawText(label, this->x + p - w / 2, this->y - GAP - h);
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} else if (this->pos == RIGHT){
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dc.DrawText(label, this->x + GAP, this->y + p - h / 2);
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} else if (this->pos == BOTTOM) {
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dc.DrawText(label, this->x + p - w / 2, this->y + GAP);
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} else if (this->pos == LEFT){
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dc.DrawText(label, this->x - w - GAP, this->y + p - h / 2);
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}
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if (this->pos == TOP) {
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dc.DrawLine(this->x + p, this->y, this->x + p, this->y - TICK_LEN);
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} else if (this->pos == RIGHT) {
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dc.DrawLine(this->x, this->y + p, this->x + TICK_LEN, this->y + p);
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} else if (this->pos == BOTTOM) {
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dc.DrawLine(this->x + p, this->y, this->x + p, this->y + TICK_LEN);
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} else if (this->pos == LEFT) {
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dc.DrawLine(this->x, this->y + p, this->x - TICK_LEN, this->y + p);
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}
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}
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