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/*
Standard slider for Winskin
Copyright (C) 1999 Martin Vogt
Copyright (C) 2002 Ryan Cumming
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.
For more information look at the file COPYRIGHT in this package
*/
#include <stdlib.h>
#include "waSlider.h"
#include "waSkinModel.h"
WaSlider::WaSlider(int sliderBarMapId, int sliderId, bool is_volume) : WaWidget(sliderBarMapId)
{
this->sliderBarMapId = sliderBarMapId;
lDragging = false;
currentValue = 0;
setRange(0, 100);
slider_y = is_volume ? 1 : 0;
slider_x = 0;
slider_width = WaSkinModel::instance()->getMapGeometry(sliderId).width();
slider_visible = true;
}
WaSlider::~WaSlider()
{
}
void WaSlider::setPixmapSliderBar(int pixId)
{
this->sliderBarId = pixId;
update();
}
void WaSlider::paintEvent(QPaintEvent *)
{
// POSBAR.BMP does not have full height in all Winamp skins
// Paint background before painting slider to be on the safe side
if(sliderBarId == _WA_SKIN_POS_BAR)
paintPixmap(-1);
paintPixmap(sliderBarId, value());
if (slider_visible)
paintPixmap(lDragging ? up_pixmap : down_pixmap, slider_x, slider_y);
}
void WaSlider::mouseMoveEvent(QMouseEvent * e)
{
if (lDragging == false) {
WaWidget::mouseMoveEvent(e);
return;
}
int newX = e->x() - pressPoint.x();
if (newX < 0)
newX = 0;
QSize size = sizeHint();
int maxX = size.width() - slider_width;
if(mapping == _WA_MAPPING_VOLUME_BAR)
maxX -= 3;
if (newX > maxX)
newX = maxX;
int value = pixel2Value(newX);
setValue(value);
}
void WaSlider::updateSliderPos(int value)
{
if (value > maxValue) {
value = maxValue;
}
if (value < minValue) {
value = minValue;
}
int pixelPos = value2Pixel(value);
slider_x = (pixelPos);
update();
}
void WaSlider::mousePressEvent(QMouseEvent *e) {
if (e->button() != LeftButton && e->button() != MidButton) {
WaWidget::mousePressEvent(e);
return;
}
int maxX = slider_x - slider_width;
if(mapping == _WA_MAPPING_VOLUME_BAR)
maxX -= 3;
if ((e->x() < slider_x) || (e->x() > (maxX))) {
int newX = e->x();
newX -= (slider_width / 2);
setValue(pixel2Value(newX));
}
pressPoint.setX(e->x() - slider_x);
lDragging = true;
update();
emit(sliderPressed());
}
void WaSlider::mouseReleaseEvent(QMouseEvent *e)
{
if (!lDragging) {
WaWidget::mouseReleaseEvent(e);
return;
}
lDragging = false;
update();
emit(sliderReleased());
}
int WaSlider::pixel2Value(int xpos)
{
QSize size = sizeHint();
int min = abs(minValue);
int max = abs(maxValue);
int valuerange = min + max;
int pixelrange = size.width() - slider_width;
if(mapping == _WA_MAPPING_VOLUME_BAR)
pixelrange -= 3;
return ((xpos * valuerange) / pixelrange) + minValue;
}
int WaSlider::value2Pixel(int value)
{
QSize size = sizeHint();
float min = (float) minValue;
float max = (float) maxValue;
float fmin = min;
float fmax = max;
if (min < 0) {
fmin = -1 * fmin;
}
if (max < 0) {
fmax = -1 * fmax;
}
float valuerange = fmin + fmax;
float verhaeltnis = fmin / valuerange;
float pixelrange = (float) (size.width() - slider_width);
if(mapping == _WA_MAPPING_VOLUME_BAR)
pixelrange -= 3;
float zeropoint = verhaeltnis * pixelrange;
float anstieg = pixelrange / valuerange;
float pixel = (float) value * anstieg + zeropoint;
return (int) (pixel+0.5); // add 0.5 to round upwards if larger than x.5
}
void WaSlider::setRange(int min, int max) {
minValue = min;
maxValue = max;
if (currentValue < min)
currentValue = min;
if (currentValue > max)
currentValue = max;
}
void WaSlider::setValue(int value) {
currentValue = value;
updateSliderPos(currentValue);
emit(valueChanged(value));
}
void WaSlider::cancelDrag() {
lDragging = false;
update();
}
#include "waSlider.moc"
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