ui修改

toast.cpp

@@ -0,0 +1,91 @@
+#include "toast.h"
+
+#include <QDialog>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QEvent>
+
+class ToastDlg: public QDialog
+{
+private:
+    QLabel* mLabel;
+    QLabel* mCloseBtn;
+protected:
+    bool eventFilter(QObject *obj, QEvent *ev) override
+    {
+        if (obj == mCloseBtn) {
+            if (ev->type() == QEvent::MouseButtonRelease) {
+                accept();
+            }
+        }
+        return QObject::eventFilter(obj, ev);
+    }
+public:
+    ToastDlg()
+    {
+        auto layout = new QHBoxLayout;//水平布局
+        mLabel = new QLabel;
+        mLabel->setStyleSheet("color: white; background:transparent");//red
+        layout->addWidget(mLabel, 1);//stretch = 1
+        mCloseBtn = new QLabel;
+        //mCloseBtn->setPixmap(QPixmap(":/res/img/close.png"));
+        mCloseBtn->installEventFilter(this);
+        mCloseBtn->setStyleSheet("background:transparent");
+        layout->addWidget(mCloseBtn);
+        setLayout(layout);
+        setWindowFlag(Qt::FramelessWindowHint);//生成一个无边界窗口。用户不能通过窗口系统移动或调整无边界窗口的大小。
+        setAttribute(Qt::WA_ShowWithoutActivating, true); //Show the widget without making it active.
+        //setAttribute(Qt::WA_TranslucentBackground, true);   // 背景透明
+    }
+
+    void show(Toast::Level level, const QString& text)
+    {
+        QPalette p = palette();
+        //QColor(int r, int g, int b, int a = 255)
+        //Constructs a color with the RGB value r, g, b, and the alpha-channel (transparency) value of a.
+        p.setColor(QPalette::Window, QColor(0, 0, 0, 200));
+        if (level == Toast::INFO) {
+            p.setColor(QPalette::Window, QColor(0x35, 0x79, 0xd5, 0x88));// 蓝色
+        } else if (level == Toast::WARN) {
+            p.setColor(QPalette::Window, QColor(0xff, 0xff, 0x33, 0x88));
+        } else { //ERROR
+            p.setColor(QPalette::Window, QColor(0xff, 0x0, 0x0, 0x88));
+        }
+        setPalette(p);//set widget's palette
+        mLabel->setText(text);
+        setWindowFlag(Qt::WindowStaysOnTopHint);//通知窗口系统该窗口应保持在所有其他窗口的顶部。
+        QDialog::show();
+    }
+};//~class ToastDlg end
+
+
+Toast::Toast()//构造函数
+{
+    dlg_ = new ToastDlg;
+}
+
+//返回一个实例(instance)
+Toast &Toast::instance()
+{
+    static Toast thiz;//这种实例化方法会自动回收内存
+    return thiz;
+}
+
+void Toast::show(Toast::Level level, const QString &text)
+{
+    dlg_->show(level, text);//ToastDlg.show方法
+    if (timer_id_ != 0) { //int mTimerId
+        //如果之前已经开启了一个定时器，先把他关掉
+        killTimer(timer_id_);
+    }
+    timer_id_ = startTimer(5000);//启动定时器，每2s触发定时器事件，直到调用killTimer
+}
+
+//重写定时器事件回调函数
+void Toast::timerEvent(QTimerEvent *event)
+{
+    killTimer(timer_id_);
+    timer_id_ = 0;
+    dlg_->accept();//隐藏模态对话框
+    //mDlg->hide();
+}