Question

我已经制作了两个简单的类来用于显示带有Awesomium的UI。但是，创建Awesomium WebView并将父窗口设置为Win32窗口会导致程序挂起并且永远不会显示页面。这些类很简单，创建一个窗口很简单，所以我可以想到的可能会出错。也许除了我为展示WebView所做的工作还需要其他东西吗？

澄清一下：创建Win32窗口而不创建WebView工作正常，窗口函数包括拖拽代码等......挂起只发生在调用set_parent_window时。

UI.h

#pragma once
#include <Windows.h>
#include <windowsx.h>
#include <Awesomium/WebCore.h>
#include <Awesomium/STLHelpers.h>

using namespace Awesomium;

LRESULT CALLBACK LoginUICallback(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);

class UI
{
public:
    //Window Variables
    HINSTANCE instance;
    HWND window;
    BOOL drag_window = false;
    SHORT mouse_x, mouse_y, mouse_x_prev, mouse_y_prev;

    //Awesomium Variables
    WebCore* webcore = 0;
    WebView* webview;

    static HWND InitWindow(INT width, INT height, WNDPROC callback)
    {
        HWND hwnd;

        WNDCLASSEX wc;
        wc.cbSize = sizeof(WNDCLASSEX);
        wc.style = 0;
        wc.lpfnWndProc = callback;
        wc.cbClsExtra = 0;
        wc.cbWndExtra = 0;
        wc.hInstance = GetModuleHandle(0);
        wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
        wc.hCursor = LoadCursor(NULL, IDC_ARROW);
        wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
        wc.lpszMenuName = NULL;
        wc.lpszClassName = "MyUI";
        wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

        if (!RegisterClassEx(&wc))
        {
            char msg[100];
            sprintf(msg, "System Error: %i", GetLastError());
            MessageBox(NULL, msg, "ERROR", MB_OK);
            return NULL;
        }

        hwnd = CreateWindow("MyUI",
            "",
            WS_POPUP,
            CW_USEDEFAULT,
            CW_USEDEFAULT,
            width,
            height,
            NULL,
            NULL,
            GetModuleHandle(0),
            NULL);

        if (!hwnd)
        {
            char msg[100];
            sprintf(msg, "System Error: %i", GetLastError());
            MessageBox(NULL, msg, "ERROR", MB_OK);
            return NULL;
        }


        ShowWindow(hwnd, SW_SHOWNORMAL);
        UpdateWindow(hwnd);
        SetTimer(hwnd, 0, 15, NULL);

        return hwnd;
    }
};

class LoginUI : public UI
{
public:
    INT width = 600;
    INT height = 600;

    INT RunUI()
    {
        this->window = UI::InitWindow(this->width, this->height, ::LoginUICallback);

        if (!this->window)
            return 0;

        WebConfig config;
        this->webcore = WebCore::Initialize(config);
        this->webview = this->webcore->instance()->CreateWebView(this->width, this->height, 0, kWebViewType_Window);
        this->webview->set_parent_window(this->window);
        this->webview->LoadURL(WebURL(WSLit("http://www.google.com")));

        MSG msg;
        while(GetMessage(&msg, this->window, 0, 0))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }

        WebCore::Shutdown();

        return 1;
    }
}login_ui;

LRESULT CALLBACK LoginUICallback(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
        case WM_COMMAND:
            return DefWindowProc(hWnd, message, wParam, lParam);
            break;
        case WM_TIMER:
            break;
        case WM_MOUSEMOVE:
        {
            if (login_ui.drag_window && (wParam & MK_LBUTTON))
            {
                // code executed when the dialog window is moved around on the screen
                RECT win_rect;
                GetWindowRect(hWnd, &win_rect);
                int x_coord = GET_X_LPARAM(lParam);
                int y_coord = GET_Y_LPARAM(lParam);
                MoveWindow(hWnd,
                    win_rect.left + x_coord - login_ui.mouse_x_prev,
                    win_rect.top + y_coord - login_ui.mouse_y_prev,
                    win_rect.right - win_rect.left,
                    win_rect.bottom - win_rect.top,
                    false
                    );
            }
            break;
        }
        case WM_LBUTTONDOWN:
        {
            login_ui.mouse_x = GET_X_LPARAM(lParam);
            login_ui.mouse_y = GET_Y_LPARAM(lParam);
            if (login_ui.mouse_y < 41)
            {
                login_ui.mouse_x_prev = login_ui.mouse_x;
                login_ui.mouse_y_prev = login_ui.mouse_y;
                SetCapture(hWnd);
                login_ui.drag_window = true;
            }
            break;
        }
        case WM_LBUTTONUP:
        {
            if (login_ui.drag_window)
            {
                login_ui.drag_window = false;
                ReleaseCapture();
            }
            break;
        }
        case WM_SIZE:
            break;
        case WM_DESTROY:
            PostQuitMessage(0);
            break;
        case WM_QUIT:
            break;
        default:
            return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}

的main.cpp

#include "UI.h"

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE, char*, int nCmdShow)
{
    login_ui.RunUI();
}

Answer 1

没有使用过Awesomium，但是你的GetMessage只为WebCore窗口提供消息。因此，您应该传递NULL，以便您的消息泵为该线程上创建的所有窗口分派消息。

Awesomium WebView不显示页面

1 个答案: