Qt開場動畫(gif效果)的實現
阿新 • • 發佈:2018-11-08
Qt自己提供了一個開場動畫的類QSplashScreen,可以實現簡單的圖片開場的效果,但是是靜態的圖片。
Qt播放gif格式圖片是利用的QMovie實現的。因此利用QMoviee和QTimer,每隔一段時間將QSplashScreen重繪一次,來實現gif動圖的效果。
具體使用:
CSplashScreen *splashscream = new CSplashScreen(":/inputdlg/2.gif");
splashscream->show();
標頭檔案程式碼
#ifndef _SPLASHSCREEN_H_ #define _SPLASHSCREEN_H_ #include <QSplashScreen> #include <QMovie> class QPixmap; class QPainter; class CSplashScreen : public QSplashScreen { Q_OBJECT public: CSplashScreen(const QPixmap & pixmap); CSplashScreen(const QString gifname); ~CSplashScreen(); void setGif(QString filename); protected: virtual void drawContents(QPainter *painter); private slots: void slot_update(); private: QMovie *m_move; int m_rotate; }; #endif // _SPLASHSCREEN_H_
cpp檔案程式碼
#include <QPixmap> #include <QPainter> #include "splashscreen.h" #include <QLabel> #include <QTimer> CSplashScreen::CSplashScreen(const QPixmap & pixmap) : QSplashScreen(pixmap) { } CSplashScreen::CSplashScreen( const QString gifname ) { setGif(gifname); } CSplashScreen::~CSplashScreen() { } void CSplashScreen::slot_update() { setPixmap(m_move->currentPixmap()); repaint(); } void CSplashScreen::drawContents(QPainter *painter) { painter->setFont(QFont("SimHei", 40)); painter->setPen(QColor(213, 218, 220)); painter->drawText(QPointF(20, 100), "教員系統"); painter->setFont(QFont("SimHei", 18)); painter->setPen(QColor(213, 218, 220)); painter->drawText(QPointF(30, 140), "Version: 1.0.0"); painter->setFont(QFont("Helvetica", 16)); painter->setPen(QColor(Qt::white)); QRect r = rect(); r.setRect(r.x(), r.y(), r.width(), r.height() -12); painter->drawText(r, Qt::AlignBottom | Qt::AlignCenter, "測試"); painter->setFont(QFont("Verdana", 11)); QSplashScreen::drawContents(painter); } void CSplashScreen::setGif( QString filename ) { m_move = new QMovie(filename); m_move->start(); QTimer *timer = new QTimer(this); connect(timer, SIGNAL(timeout()), this, SLOT(slot_update())); timer->start(100); }