[Win32 & GDI+Flat] 用分層視窗實現簡單仿Aero透明效果
阿新 • • 發佈：2019-02-20
首先說一下GDI+Flat：我有寫過一個GDI+Flat的系列部落格，一共有10篇，都是順著的，這是第一篇：GdiplusFlat（1）GDI+平面API：用GDI的思想進行GDI+程式設計，有興趣的可以看一看。因為本篇中的繪圖函式都是用的GDI+Flat，因此我們需要自己宣告函式，自己定義資料結構，只用Win32和c語言的基本資料型別。
好了，廢話不多說，先上圖：
測試結果：XP、Win7（Areo/Basic）、Win8.1、Win10下都能很好的工作
如果覺得標題欄和邊框不好看，可以改顏色，也可以改成漸變的，還可以用圖片，比如畫個透明玻璃的PNG圖片，如果是帶陰影的玻璃的圖片，就和Win7的Aero差不多了，可惜我不會PS。
原始碼如下：
#include "stdafx.h" //#include <gdiplus.h> //#include <gdiplusflat.h> #pragma comment(lib,"gdiplus.lib")//very important #include <windows.h> #include <windowsx.h> #pragma comment(lib,"user32.lib") #pragma comment(lib,"gdi32.lib") #pragma comment(lib,"Msimg32.lib") #include<OleCtl.h> #pragma comment(lib,"OleAut32.lib") //GDI+Flat #define ARGB(a,r,g,b) ((int)(((BYTE)a)<<24)|(((BYTE)r)<<16)|(((BYTE)g)<<8)|((BYTE)b)) typedef struct _GdiplusStartupInput{ unsigned int GdiplusVersion; unsigned int DebugEventCallback; BOOL SuppressBackgroundThread; BOOL SuppressExternalCodecs; }GdiplusStartupInput; extern "C" int WINAPI GdiplusStartup(int* token, GdiplusStartupInput *input, int *output); extern "C" void WINAPI GdiplusShutdown(int token); extern "C" int WINAPI GdipCreateFromHDC(HDC hdc, int* graphics); extern "C" int WINAPI GdipDeleteGraphics(int graphics); //畫筆 extern "C" int WINAPI GdipCreatePen1(unsigned int argb_color, float width, int unit, int** pen); extern "C" int WINAPI GdipDeletePen(int* pen); //畫矩形 畫直線 extern "C" int WINAPI GdipDrawRectangle(int graphics, int* pen, float x, float y, float width, float height); extern "C" int WINAPI GdipDrawLine(int graphics, int* pen, float x1, float y1, float x2, float y2); //畫刷 typedef struct _PointF{ float x; float y; }PointF; extern "C" int WINAPI GdipCreateSolidFill(unsigned int argb_color, int** brush); extern "C" int WINAPI GdipCreateLineBrush(PointF* point1, PointF* point2, unsigned int argb_color1, unsigned int argb_color2, int wrapMode, int** lineGradient); extern "C" int WINAPI GdipDeleteBrush(int* brush); //畫填充矩形 extern "C" int WINAPI GdipFillRectangle(int graphics, int* brush, float x, float y, float width, float height); //畫圖片 extern "C" int WINAPI GdipLoadImageFromFile(WCHAR* filename, int** image); extern "C" int WINAPI GdipLoadImageFromStream(LPSTREAM stream, int** image); extern "C" int WINAPI GdipGetImageDimension(int* image, float* width, float* height); extern "C" int WINAPI GdipDrawImageRect(int graphics, int* image, float x, float y, float width, float height); extern "C" int WINAPI GdipDisposeImage(int* image); //畫文字 typedef struct _RectF{ float x; float y; float Width; float Height; }RectF; extern "C" int WINAPI GdipSetTextRenderingHint(int graphics, int mode); extern "C" int WINAPI GdipSetSmoothingMode(int graphics, int smoothingMode); extern "C" int WINAPI GdipCreateFontFamilyFromName(WCHAR* name, int* fontCollection, int** fontFamily); extern "C" int WINAPI GdipCreateStringFormat(int formatAttributes, short language, int** format); extern "C" int WINAPI GdipSetStringFormatAlign(int* format, int align); extern "C" int WINAPI GdipSetStringFormatLineAlign(int* format, int align); extern "C" int WINAPI GdipCreateFont(int* fontFamily, float emSize, int style, int unit, int** font); extern "C" int WINAPI GdipDrawString(int graphics, WCHAR* string, int length, int* font, RectF* layoutRect, int* stringFormat, int* brush); extern "C" int WINAPI GdipDeleteFont(int* font); extern "C" int WINAPI GdipDeleteStringFormat(int* format); extern "C" int WINAPI GdipDeleteFontFamily(int* fontFamily); int token; int* pen; int* brush; int* image; void WINAPI MyDrawText(HDC hdc, LPWSTR str, LONG left, LONG top, LONG width, LONG height, BOOL iscenter, COLORREF color = 0){ int graphics; GdipCreateFromHDC(hdc, &graphics);//建立Graphics物件 GdipCreateSolidFill(color, &brush);//建立單色畫刷 GdipSetTextRenderingHint(graphics, 3);//設定Graphics物件的文字渲染模式 int* fontfamily; GdipSetSmoothingMode(graphics, 4);//設定Graphics物件的渲染質量 GdipCreateFontFamilyFromName(L"宋體", NULL, &fontfamily);//建立一個基於指定的字體系列的FontFamily物件 int* format; GdipCreateStringFormat(0, 0, &format);//建立一個基於字串的格式標誌和語言的 StringFormat 物件 int* font; GdipCreateFont(fontfamily, 12, 0, 2, &font);//建立字型 RectF rect; rect = { left, top, width, height }; GdipDrawString(graphics, str, -1, font, &rect, 0, brush);//畫文字 GdipDeleteFont(font);//銷燬指定Font物件，釋放資源 GdipDeleteStringFormat(format);//銷燬指定StringFormat物件，釋放資源 GdipDeleteFontFamily(fontfamily);//銷燬指定FontFamily物件，釋放資源 GdipDeleteBrush(brush);//銷燬畫刷 GdipDeleteGraphics(graphics);//銷燬Graphics物件 }//引數：裝置上下文控制代碼，要繪製的字串，x位置，y位置，寬度，高度，是否繪製在矩形中央，argb顏色 //************************************************************* LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam); WNDCLASS wc; const TCHAR* AppName = TEXT("MyWindowClass1"); HWND hwnd1; HDC mdc, mdc2; int APIENTRY _tWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPTSTR lpCmdLine, _In_ int nCmdShow) { //GDI+開啟 GdiplusStartupInput StartupInput = { 0 }; StartupInput.GdiplusVersion = 1; if (GdiplusStartup(&token, &StartupInput, NULL))MessageBox(0, TEXT("GdiPlus開啟失敗"), TEXT("錯誤"), MB_ICONERROR); //這裡是在構建視窗類結構 wc.style = CS_HREDRAW | CS_VREDRAW; wc.lpfnWndProc = WndProc;//視窗回撥函式指標 wc.cbClsExtra = 0; wc.cbWndExtra = 0; wc.hInstance = hInstance;//例項控制代碼 wc.hIcon = LoadIcon(hInstance, TEXT("ICON_1")); wc.hCursor = LoadCursor(NULL, IDC_ARROW);//預設指標 wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1); wc.lpszMenuName = NULL; wc.lpszClassName = AppName;//視窗類名 //註冊視窗類 if (!RegisterClass(&wc)) { MessageBox(NULL, TEXT("註冊視窗類失敗!"), TEXT("錯誤"), MB_ICONERROR); return 0; } //建立視窗 int style = WS_OVERLAPPEDWINDOW; hwnd1 = CreateWindowEx(WS_EX_LAYERED | WS_EX_TOPMOST, AppName, TEXT("視窗標題"), style, 0, 0, 0, 0, 0, LoadMenu(hInstance, TEXT("MENU1")), hInstance, 0); if (hwnd1 == NULL) { MessageBox(NULL, TEXT("建立視窗失敗!"), TEXT("錯誤"), MB_ICONERROR); return 0; } //無邊框視窗 SetWindowLong(hwnd1, GWL_STYLE, WS_OVERLAPPED | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS); SetWindowPos(hwnd1, HWND_TOP, 50, 50, 500, 500, SWP_SHOWWINDOW); mdc = CreateCompatibleDC(0);//建立記憶體DC BITMAPINFO bitmapinfo; RtlZeroMemory(&bitmapinfo, sizeof(BITMAPINFO)); bitmapinfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER); bitmapinfo.bmiHeader.biWidth = 500; bitmapinfo.bmiHeader.biHeight = 500; bitmapinfo.bmiHeader.biPlanes = 1; bitmapinfo.bmiHeader.biBitCount = 32; HBITMAP b, old; b = CreateDIBSection(0, &bitmapinfo, 0, 0, 0, 0); old = (HBITMAP)SelectObject(mdc, b); if (old != NULL){ DeleteObject(old); } DeleteObject(b); int graphics; GdipCreateFromHDC(mdc, &graphics);//建立Graphics物件 GdipCreateSolidFill(0x80FFFFFF, &brush);//建立畫刷，這是整體的背景，有透明度 GdipFillRectangle(graphics, brush, 0, 0, 500, 500);//畫填充矩形 GdipDeleteBrush(brush);//銷燬畫刷 GdipCreatePen1(ARGB(200, 0, 157, 225), 1, 2, &pen);//建立畫筆 GdipDrawRectangle(graphics, pen, 0, 0, 499, 499);//畫矩形 GdipDeletePen(pen);//銷燬畫筆 MyDrawText(mdc, L"神奇的分層視窗", 25, 8, 0, 0, true, ARGB(254,0,0,0));//畫文字，注意透明度用254 GdipLoadImageFromFile(L"D:\\1.png", &image);//建立Image物件 GdipDrawImageRect(graphics, image, 3, 3, 20, 20);//畫圖片 GdipDisposeImage(image);//銷燬圖片，釋放資源 GdipCreateSolidFill(ARGB(255, 255, 255, 255), &brush); GdipFillRectangle(graphics, brush, 5, 30, 490, 465);//這是畫裡面的背景 GdipDeleteBrush(brush); GdipDeleteGraphics(graphics);//銷燬Graphics物件 POINT point; point.x = 0; point.y = 0;//更新分層視窗 SIZE size; size.cx = 500; size.cy = 500; BLENDFUNCTION blend; blend.BlendOp = AC_SRC_OVER; blend.BlendFlags = 0; blend.AlphaFormat = AC_SRC_ALPHA; blend.SourceConstantAlpha = 255; UpdateLayeredWindow(hwnd1, NULL, NULL, &size, mdc, &point, 0, &blend, ULW_ALPHA);//。。。。。。更新分層視窗 //顯示、更新視窗 ShowWindow(hwnd1, nCmdShow); UpdateWindow(hwnd1); //訊息迴圈 MSG msg; while (GetMessage(&msg, NULL, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); } //GDI+關閉 GdiplusShutdown(token);//可以把這個寫在訊息迴圈後面，程式退出就銷燬，或者在不需要GDI+時呼叫，比如GDI+視窗的WM_DESTROY訊息裡呼叫 return msg.wParam; } LRESULT CALLBACK WndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { switch (uMsg){ case WM_CREATE: return 0; break; case WM_DESTROY://視窗已經銷燬 PostQuitMessage(0);//退出訊息迴圈，結束應用程式 return 0; break; case WM_LBUTTONDOWN: //讓無邊框視窗能夠拖動(在視窗客戶區拖動) PostMessage(hwnd, WM_SYSCOMMAND, 61458, 0); break; default: break; } return DefWindowProc(hwnd, uMsg, wParam, lParam);//其他訊息交給系統處理 }
這裡要說明一下：
1。UpdateLayeredWindow以後就不能在WM_PAINT裡繪圖了，但是WM_PAINT訊息依舊響應。
2。需要作圖時，應該先把圖畫到記憶體DC裡，然後再呼叫UpdateLayeredWindow
3。或者在這個視窗上面再加一個視窗，在WM_MOVING裡面控制另一個視窗移動，要不然分層視窗上是不能放控制元件的，只能自己一個個畫上去