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/*
Copyright (C) 2009 Andrew Caudwell (acaudwell@gmail.com)
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version
3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "slider.h"
// PositionSlider
PositionSlider::PositionSlider(float percent) {
this->percent = percent;
font = fontmanager.grab("FreeMonoBold.ttf", 16, 72, FT_LOAD_NO_HINTING);
font.dropShadow(true);
slidercol = vec3(1.0, 1.0, 1.0);
mouseover = -1.0;
mouseover_elapsed = 1.0;
fade_time = 1.0;
alpha = 0.0;
resize();
}
const Bounds2D& PositionSlider::getBounds() const {
return bounds;
}
bool PositionSlider::isVisible() const {
return alpha > 0.0f;
}
void PositionSlider::resize() {
int gap = 35;
int offset = 45;
bounds.reset();
bounds.update(vec2(gap, display.height - gap - offset));
bounds.update(vec2(display.width - gap, display.height - offset));
}
void PositionSlider::setColour(vec3 col) {
slidercol = col;
}
void PositionSlider::show() {
mouseover_elapsed = 0.0;
}
bool PositionSlider::isMouseOver(const vec2& pos) const {
return (isVisible() && bounds.contains(pos));
}
bool PositionSlider::mouseMove(const vec2& pos, float* percent_ptr) {
if(bounds.contains(pos)) {
mouseover_elapsed = 0;
mouseover = pos.x;
if(percent_ptr != 0) {
*percent_ptr = (float) (pos.x - bounds.min.x) / (bounds.max.x - bounds.min.x);
}
return true;
}
mouseover = -1.0;
return false;
}
bool PositionSlider::click(const vec2& pos, float* percent_ptr) {
if(mouseMove(pos, &percent)) {
if(percent_ptr != 0) {
*percent_ptr = percent;
}
return true;
}
return false;
}
void PositionSlider::setCaption(const std::string& caption) {
capwidth = 0.0;
this->caption = caption;
if(caption.size()) {
capwidth = font.getWidth(caption.c_str());
}
}
void PositionSlider::setPercent(float percent) {
this->percent = percent;
}
void PositionSlider::logic(float dt) {
if(mouseover < 0.0 && mouseover_elapsed < fade_time) mouseover_elapsed += dt;
if(mouseover_elapsed < fade_time && alpha < 1.0) {
alpha = std::min(1.0f, alpha+dt);
} else if(mouseover_elapsed >= fade_time && alpha > 0.0) {
alpha = std::max(0.0f, alpha-dt);
}
}
void PositionSlider::drawSlider(float pos_x) const {
glLineWidth(2.0f);
bounds.draw();
glLineWidth(2.0f);
glBegin(GL_LINES);
glVertex2f(pos_x, bounds.min.y);
glVertex2f(pos_x, bounds.max.y);
glEnd();
}
void PositionSlider::draw(float dt) {
glDisable(GL_TEXTURE_2D);
float pos_x = bounds.min.x + (bounds.max.x - bounds.min.x) * percent;
glColor4f(0.0f, 0.0f, 0.0f, 0.7*alpha);
glPushMatrix();
glTranslatef(2.0, 2.0, 0.0);
drawSlider(pos_x);
glPopMatrix();
glColor4f(slidercol.x, slidercol.y, slidercol.z, alpha);
drawSlider(pos_x);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glEnable(GL_TEXTURE_2D);
glColor4f(1.0, 1.0, 1.0, 1.0);
if(caption.size() && mouseover >= 0.0) {
font.draw(std::min((double)display.width - capwidth - 1.0, std::max(1.0, mouseover - (capwidth/2.0))), bounds.min.y - 25.0, caption);
}
}
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