| 305750665 |
2020-07-11 15:32 |
Qt动效StackWidget
## Qt动效StackWidget
@[toc]
### 功能
1. QStackWidget有的AStackWidget都有
2. 支持设置动效时常
### 效果图
[attachment=21732]
### 代码
```cpp
#include "AStackWidget.h"
#include <QDebug>
#include <QPropertyAnimation>
AStackWidget::AStackWidget(QWidget *parent)
: QWidget(parent)
{
m_offset = 0;
m_curIndex = 0;
m_lastIndex = 0;
m_duration = 500;
m_moveAnimation = new QPropertyAnimation(this, "");
m_moveAnimation->setDuration(m_duration);
connect(m_moveAnimation, &QPropertyAnimation::valueChanged, this, &AStackWidget::onValueChanged);
}
AStackWidget::~AStackWidget()
{
}
int AStackWidget::count() const
{
return m_widgetLst.size();
}
int AStackWidget::currentIndex() const
{
return m_curIndex;
}
void AStackWidget::setDuration(int duration)
{
m_duration = duration;
}
int AStackWidget::addWidget(QWidget * widget)
{
int index = indexOf(widget);
if (index >= 0){
return index;
}
widget->setParent(this);
m_widgetLst.append(widget);
return count() - 1;
}
int AStackWidget::indexOf(QWidget * widget) const
{
return m_widgetLst.indexOf(widget);
}
int AStackWidget::insertWidget(int index, QWidget * widget)
{
int curindex = indexOf(widget);
if (curindex >= 0) {
return curindex;
}
widget->setParent(this);
m_widgetLst.insert(index, widget);
return index;
}
QWidget * AStackWidget::currentWidget() const
{
if (m_curIndex >= 0 && m_curIndex < count()){
return m_widgetLst.at(m_curIndex);
}
return nullptr;
}
QWidget * AStackWidget::widget(int index) const
{
if (index >= 0 && index < count()) {
return m_widgetLst.at(index);
}
return nullptr;
}
void AStackWidget::removeWidget(QWidget * widget)
{
int index = indexOf(widget);
if (index >= 0) {
m_widgetLst.removeAll(widget);
emit widgetRemoved(index);
}
}
void AStackWidget::setCurrentWidget(QWidget * widget)
{
int index = indexOf(widget);
if (index >= 0 && m_curIndex != index) {
setCurrentIndex(index);
}
}
void AStackWidget::setCurrentIndex(int index)
{
if (index >= 0 && m_curIndex != index) {
m_lastIndex = m_curIndex;
m_curIndex = index;
moveAnimationStart();
emit currentChanged(index);
}
}
void AStackWidget::resizeEvent(QResizeEvent *event)
{
QWidget::resizeEvent(event);
int size = count();
for (int i = 0; i < size; i++) {
m_widgetLst.at(i)->resize(this->width(), this->height());
}
if (m_moveAnimation->state() == QAbstractAnimation::Running) {
moveAnimationStart();
}
else {
setWidgetsVisible();
}
}
void AStackWidget::onValueChanged(const QVariant &value)
{
m_offset = value.toInt();
m_widgetLst.at(m_curIndex)->move(m_offset, 0);
if (m_curIndex > m_lastIndex) {
m_widgetLst.at(m_lastIndex)->move(m_offset - this->width(), 0);
}
else {
m_widgetLst.at(m_lastIndex)->move(this->width() + m_offset, 0);
}
}
void AStackWidget::moveAnimationStart()
{
m_moveAnimation->stop();
setWidgetsVisible();
int startOffset = m_offset;
if (m_curIndex > m_lastIndex) {
if (startOffset == 0) startOffset = this->width();
else startOffset = this->width() - qAbs(startOffset);
}
else {
if (startOffset == 0) startOffset = -this->width();
else startOffset = qAbs(startOffset) - this->width();
}
m_moveAnimation->setDuration(qAbs(startOffset) * m_duration / this->width());
m_moveAnimation->setStartValue(startOffset);
m_moveAnimation->setEndValue(0);
m_moveAnimation->start();
}
void AStackWidget::setWidgetsVisible()
{
int size = count();
for (int i = 0; i < size; i++) {
if (m_lastIndex == i || m_curIndex == i)
m_widgetLst.at(i)->setVisible(true);
else {
m_widgetLst.at(i)->setVisible(false);
}
}
}
```
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