WinUI 3 C++ 控制項教學 – 浮動彈窗（Popup 通知視窗）

首先示範 Popup 彈窗元件

在 XAML 裡新增一個按鈕，點擊按鈕喚出 Popup；同時宣告 Popup 容器，預設為隱藏狀態，僅點擊按鈕後才顯示。

    <StackPanel Spacing="24" VerticalAlignment="Top">

        <!-- 原生 Popup 根容器 -->
        <Popup x:Name="MainPopup" Width="320" Height="180">
            <Border Background="White" BorderBrush="Gray" BorderThickness="1" CornerRadius="8" Padding="16">
                <StackPanel Spacing="12">
                    <TextBlock Text="自訂彈窗內容" FontSize="18"/>
                    <TextBlock Text="這是底層原生 Popup 容器"/>
                    <Button Content="關閉彈窗" Click="BtnClosePopup_Click"/>
                </StackPanel>
            </Border>
        </Popup>

        <Button Content="開啟原生 Popup 容器" Click="BtnOpenPopup_Click" HorizontalAlignment="Left"
        ToolTipService.ToolTip="開啟底層彈窗層"/>

    </StackPanel>Code language: HTML, XML (xml)

接著實作按鈕點擊事件 BtnOpenPopup_Click，邏輯為開啟彈窗。<Popup x:Name="MainPopup" Width="320" Height="180"> ...</Popup> 用來建立浮動彈窗，預設關閉；內部放置按鈕 <Button Content="關閉彈窗" Click="BtnClosePopup_Click"/>，點擊該按鈕即可關閉所屬 Popup。

按下 F12，自動產生兩個按鈕點擊事件函式

.H 標頭檔

#pragma once

#include "MainWindow.g.h"

namespace winrt::AppWinui::implementation
{
    struct MainWindow : MainWindowT<MainWindow>
    {
    public:
        MainWindow();

        int32_t MyProperty();
        void MyProperty(int32_t value);

        void BtnOpenPopup_Click(winrt::Windows::Foundation::IInspectable const& sender, winrt::Microsoft::UI::Xaml::RoutedEventArgs const& e);
        void BtnClosePopup_Click(winrt::Windows::Foundation::IInspectable const& sender, winrt::Microsoft::UI::Xaml::RoutedEventArgs const& e);
    };
}

namespace winrt::AppWinui::factory_implementation
{
    struct MainWindow : MainWindowT<MainWindow, implementation::MainWindow>
    {
    };
}
Code language: C++ (cpp)

#include "pch.h"
#include "MainWindow.xaml.h"
#if __has_include("MainWindow.g.cpp")
#include "MainWindow.g.cpp"
#endif

#include <winrt/Windows.Foundation.h>
#include <winrt/Windows.Globalization.h>

#include <winrt/Windows.UI.h> //Windows::UI::Colors


// 全域命名空間別名，解決類別找不到、RoutedEventArgs 未定義錯誤
using namespace winrt;
using namespace Windows::Foundation;
using namespace Windows::Foundation::Collections;
using namespace Microsoft::UI::Xaml;
using namespace Microsoft::UI::Xaml::Controls;
using namespace Microsoft::UI::Xaml::Controls::Primitives;


// To learn more about WinUI, the WinUI project structure,
// and more about our project templates, see: http://aka.ms/winui-project-info.

namespace winrt::AppWinui::implementation
{
    int32_t MainWindow::MyProperty()
    {
        throw hresult_not_implemented();
    }

    void MainWindow::MyProperty(int32_t /* value */)
    {
        throw hresult_not_implemented();
    }

    MainWindow::MainWindow()
    {
        InitializeComponent();
    }
}


void winrt::AppWinui::implementation::MainWindow::BtnOpenPopup_Click(winrt::Windows::Foundation::IInspectable const& sender, winrt::Microsoft::UI::Xaml::RoutedEventArgs const& e)
{
    MainPopup().IsOpen(true);
}

void winrt::AppWinui::implementation::MainWindow::BtnClosePopup_Click(winrt::Windows::Foundation::IInspectable const& sender, winrt::Microsoft::UI::Xaml::RoutedEventArgs const& e)
{
    MainPopup().IsOpen(false);
}
Code language: C++ (cpp)

WinUI 3 C++ 控制項教學 – 浮動彈窗（Popup 通知視窗）