Question

我最近尝试为KDE4编写动画壁纸插件。当我在它们之间切换时，动画会混乱。也就是说，先前的动画不会停止，并且先前的帧和当前帧混合在一起。我将帧嵌入到每个程序中作为图像资源。然后我为每个壁纸编写如下代码。任何人都可以告诉我我错过了什么（或者它只是一个KDE错误）？

dancingcoffee.h

#ifndef DANCINGCOFFEE_H
#define DANCINGCOFFEE_H

#include <Plasma/Wallpaper>
#include <QPainter>
#include <QTimer>

class DancingCoffee : public Plasma::Wallpaper
{
    Q_OBJECT
public:
    DancingCoffee(QObject *parent, const QVariantList& args);
    void paint(QPainter *painter, const QRectF &exposedRect);

private slots:
    void updateBackground();

    private:
    const int m_frames;
    const int m_interval;

    int m_frame_number;
    QTimer m_timer;
};

#endif // DANCINGCOFFEE_H

dancingcoffee.cpp

#include "dancingcoffee.h"
#include <QImage>

K_EXPORT_PLASMA_WALLPAPER(coffee, DancingCoffee)

DancingCoffee::DancingCoffee(QObject *parent, const QVariantList &args) :
    Plasma::Wallpaper(parent, args),
    m_frames(2),
    m_interval(1000 / m_frames)
{
    m_frame_number = 0;

    m_timer.setSingleShot(true);
    connect(&m_timer, SIGNAL(timeout()), this, SLOT(updateBackground()));
    m_timer.start(m_interval);
}

void DancingCoffee::paint(QPainter *painter, const QRectF &exposedRect)
{
    QString name = QString(":/images/frame-%1.png").arg(m_frame_number);
    QImage image(name);
    painter->drawImage(exposedRect, image);
}

void DancingCoffee::updateBackground()
{
    ++m_frame_number;
    m_frame_number %= m_frames;
    m_timer.start(m_interval);
    emit update(boundingRect());
}

的CMakeLists.txt

set(CMAKE_INSTALL_PREFIX /usr)

project(plasma-wallpaper-coffee)
cmake_minimum_required(VERSION 2.8)

find_package(KDE4 REQUIRED)
find_package(KDE4Workspace REQUIRED)
include(KDE4Defaults)

add_definitions(${KDE4_DEFINITIONS})
include_directories(${CMAKE_SOURCE_DIR} ${CMAKE_BINARY_DIR} ${KDE4_INCLUDES})

set(TARGET plasma_wallpaper_coffee)
set(SRC_LIST dancingcoffee.cpp)
qt4_add_resources(RCC_LIST dancingcoffee.qrc)

kde4_add_plugin(${TARGET} ${SRC_LIST} ${RCC_LIST})
target_link_libraries(${TARGET} ${KDE4_PLASMA_LIBS})

install(TARGETS ${TARGET} DESTINATION ${PLUGIN_INSTALL_DIR})
install(FILES plasma-wallpaper-coffee.desktop DESTINATION ${SERVICES_INSTALL_DIR})

等离子体壁纸-coffee.desktop

[Desktop Entry]
Name=Coffee
Type=Service
Icon=image-jpeg
ServiceTypes=Plasma/Wallpaper

X-KDE-Library=plasma_wallpaper_coffee
X-KDE-PluginInfo-Author=Chris French
X-KDE-PluginInfo-Email=unclechromedome@gmail.com
X-KDE-PluginInfo-Name=coffee
X-KDE-PluginInfo-Version=0.1
X-KDE-PluginInfo-Website=
X-KDE-PluginInfo-Depends=
X-KDE-PluginInfo-License=GPL
X-KDE-PluginInfo-EnabledByDefault=true

瞧！我桌面上的动画壁纸。但壁纸不能很好地融合在一起。当我切换壁纸时，我必须杀死桌面并重新启动它，有时甚至不起作用。有时我必须重新启动。这对我来说很痛苦，如果我分发壁纸，这是不可接受的。

如何保持自己的动画KDE壁纸一起运行？

0 个答案: