wpf实现仿qq消息提示框

原文:wpf实现仿qq消息提示框

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/huangli321456/article/details/50523144

1、实现步骤

1.1 另起一个窗口作为消息提示的窗口，在主窗体中调用，先处理一下消息框的展示问题， AllowsTransparency="True"  WindowStyle="None" WindowStartupLocation="Manual"，实现允许透明，隐藏自带的工具条（关闭、最大/最小化），自定义窗口位置。

1.2 修改窗体的展示位置为右下角

1.3 通过渐入动画展示窗体，通过定时器自动关闭消息框，关闭时通过渐出动画关闭窗体。

2、关键代码：

渐出动画：

<Window.Resources>

        <Storyboard x:Key="ClosedStoryboard" Storyboard.TargetName="mGrid">

            <DoubleAnimation From="0" To="1" Duration="0:0:0.2" Storyboard.TargetProperty="OpacityMask.(GradientBrush.GradientStops)[1].Offset"/>

            <DoubleAnimation From="0" To="1" Duration="0:0:0" BeginTime="0:0:0.2" Storyboard.TargetProperty="OpacityMask.(GradientBrush.GradientStops)[2].Offset"/>

            <ColorAnimation To="#00000000" Duration="0" Storyboard.TargetProperty="OpacityMask.(GradientBrush.GradientStops)[2].Color"/>

        </Storyboard>

        <LinearGradientBrush x:Key="ClosedBrush" StartPoint="0.5,0" EndPoint="0.5,1">

            <GradientStop Color="#FF000000" Offset="1"/>

            <GradientStop Color="#FF000000" Offset="1"/>

            <GradientStop Color="#FF000000" Offset="0"/>

        </LinearGradientBrush>

    </Window.Resources>

添加遮罩层：

<Grid.OpacityMask>

            <LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">

                <GradientStop Color="#00000000" Offset="0"/>

                <GradientStop Color="#00000000" Offset="1"/>

                <GradientStop Color="#00000000" Offset="1"/>

            </LinearGradientBrush>

        </Grid.OpacityMask>

添加触发器，窗体加载完后启动渐入动画：

<Grid.Triggers>

            <EventTrigger RoutedEvent="Window.Loaded">

                <EventTrigger.Actions>

                    <BeginStoryboard>

                        <Storyboard>

                            <DoubleAnimation From="1" To="0" Duration="0:0:0.2" Storyboard.TargetProperty="OpacityMask.(GradientBrush.GradientStops)[1].Offset"/>

                            <DoubleAnimation From="1" To="0" Duration="0:0:0" BeginTime="0:0:0.2" Storyboard.TargetProperty="OpacityMask.(GradientBrush.GradientStops)[2].Offset"/>

                            <ColorAnimation To="#FF000000" Duration="0" Storyboard.TargetProperty="OpacityMask.(GradientBrush.GradientStops)[2].Color"/>

                        </Storyboard>

                    </BeginStoryboard>

                </EventTrigger.Actions>

            </EventTrigger>

        </Grid.Triggers>

关闭提示框是先启动渐出动画，再关闭窗体：

this.IsEnabled = false;

            mGrid.OpacityMask = this.Resources["ClosedBrush"] as LinearGradientBrush;

            Storyboard std = this.Resources["ClosedStoryboard"] as Storyboard;

            std.Completed += delegate { this.Close(); };

            std.Begin();

源码下载

效果：