dolphin/Source/Core/DolphinQt/TAS/StickWidget.cpp
sowens99 3bc9f66336 Inscribe StickWidget ellipse in square
Previously, it was not clear where the boundary of the StickWidget was when interacting outside of the circle. This aims to restore the gray square present in the Wx-era.
2021-09-20 13:18:13 -04:00

104 lines
2.6 KiB
C++

// Copyright 2018 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "DolphinQt/TAS/StickWidget.h"
#include <algorithm>
#include <cmath>
#include <QMouseEvent>
#include <QPainter>
#include "Common/CommonTypes.h"
constexpr int PADDING = 1;
StickWidget::StickWidget(QWidget* parent, u16 max_x, u16 max_y)
: QWidget(parent), m_max_x(max_x), m_max_y(max_y)
{
setMouseTracking(false);
setToolTip(tr("Left click to set the stick value.\n"
"Right click to re-center it."));
// If the widget gets too small, it will get deformed.
setMinimumSize(QSize(64, 64));
}
void StickWidget::SetX(u16 x)
{
m_x = std::min(m_max_x, x);
update();
}
void StickWidget::SetY(u16 y)
{
m_y = std::min(m_max_y, y);
update();
}
void StickWidget::paintEvent(QPaintEvent* event)
{
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing, true);
painter.setRenderHint(QPainter::SmoothPixmapTransform, true);
const int diameter = std::min(width(), height()) - PADDING * 2;
// inscribe the StickWidget inside a square
painter.fillRect(PADDING, PADDING, diameter, diameter, Qt::lightGray);
painter.setBrush(Qt::white);
painter.drawEllipse(PADDING, PADDING, diameter, diameter);
painter.drawLine(PADDING, PADDING + diameter / 2, PADDING + diameter, PADDING + diameter / 2);
painter.drawLine(PADDING + diameter / 2, PADDING, PADDING + diameter / 2, PADDING + diameter);
// convert from value space to widget space
u16 x = PADDING + ((m_x * diameter) / m_max_x);
u16 y = PADDING + (diameter - (m_y * diameter) / m_max_y);
painter.drawLine(PADDING + diameter / 2, PADDING + diameter / 2, x, y);
painter.setBrush(Qt::blue);
int neutral_radius = diameter / 30;
painter.drawEllipse(x - neutral_radius, y - neutral_radius, neutral_radius * 2,
neutral_radius * 2);
}
void StickWidget::mousePressEvent(QMouseEvent* event)
{
handleMouseEvent(event);
m_ignore_movement = event->button() == Qt::RightButton;
}
void StickWidget::mouseMoveEvent(QMouseEvent* event)
{
if (!m_ignore_movement)
handleMouseEvent(event);
}
void StickWidget::handleMouseEvent(QMouseEvent* event)
{
if (event->button() == Qt::RightButton)
{
m_x = std::round(m_max_x / 2.);
m_y = std::round(m_max_y / 2.);
}
else
{
// convert from widget space to value space
int new_x = (event->x() * m_max_x) / width();
int new_y = m_max_y - (event->y() * m_max_y) / height();
m_x = std::max(0, std::min(static_cast<int>(m_max_x), new_x));
m_y = std::max(0, std::min(static_cast<int>(m_max_y), new_y));
}
emit ChangedX(m_x);
emit ChangedY(m_y);
update();
}