Visual c++ 使用Direct2D绘制圆形进度条
我正在创建一个圆形进度条控件,并使用Direct2D绘制它 我想得到这样的东西: 我很难想出如何画这种梯度。我已经实现了用纯色画笔或使用不同的渐变(线性、径向)绘制进度,但我无法按照图像中的条形绘制渐变 这就是我现在拥有的: 谁能给我一个提示,我要用什么样的刷子才能得到我想要的 提前谢谢 我想要一个圆弧渐变…类似这样的东西:Visual c++ 使用Direct2D绘制圆形进度条,visual-c++,progress-bar,direct2d,Visual C++,Progress Bar,Direct2d,我正在创建一个圆形进度条控件,并使用Direct2D绘制它 我想得到这样的东西: 我很难想出如何画这种梯度。我已经实现了用纯色画笔或使用不同的渐变(线性、径向)绘制进度,但我无法按照图像中的条形绘制渐变 这就是我现在拥有的: 谁能给我一个提示,我要用什么样的刷子才能得到我想要的 提前谢谢 我想要一个圆弧渐变…类似这样的东西: 我只是制定了这个的初始版本,不确定这是否是您想要的,仅供参考 最终效果 编程步骤如下: 创建圆的轮廓(可以通过组合两个椭圆来创建几何图形组) 创建半径渐变笔刷,使用此
我只是制定了这个的初始版本,不确定这是否是您想要的,仅供参考 最终效果 编程步骤如下:
#包括
#如果(P){P->RELEASE();P=NULL;}
常数int几何体_计数=2;
ID2D1Factory*g_pD2DFactory=NULL;//Direct2D工厂
ID2D1HwndRenderTarget*g_pRenderTarget=NULL;//渲染目标
ID2D1SolidColorBrush*g_pBlackBrush=NULL;//轮廓刷
ID2D1RadialGradientBrush*g_pRadialGradientBrush=NULL;//径向梯度刷
//2圈以建立几何图形组。这是进度条的概要
D2D1_椭圆g_椭圆E0=D2D1::椭圆(D2D1::Point2F(300300),150150);
D2D1_椭圆g_椭圆E1=D2D1::椭圆(D2D1::Point2F(300300),200200);
D2D1_椭圆g_椭圆[几何体计数]=
{
g_Ellipse0,
g_Ellipse1,
};
ID2D1Ellipsegometry*g_Pellipsarray[几何体计数]={NULL};
ID2D1GeometryGroup*g_PGGeometryGroup=NULL;
VOID CreateD2DResource(HWND HWND)
{
如果(!g_pRenderTarget)
{
HRESULT-hr;
hr=D2D1CreateFactory(D2D1\u工厂类型\u单螺纹,&g\u pD2DFactory);
如果(失败(小时))
{
MessageBox(hWnd,“创建D2D工厂失败!”,“错误”,0);
返回;
}
//获取绘图区域的大小
RECT-rc;
GetClientRect(hWnd和rc);
//创建Direct2D渲染目标
hr=g_pD2DFactory->CreateHwnRenderTarget(
D2D1::RenderTargetProperties(),
D2D1::HwndRenderTargetProperties(
hWnd,
D2D1::SizeU(右栏-左栏,下栏-上栏)
),
&g_pRenderTarget
) ;
如果(失败(小时))
{
MessageBox(hWnd,“创建渲染目标失败!”,“错误”,0);
返回;
}
//创建轮廓笔刷(黑色)
hr=g_pRenderTarget->CreateSolidColorBrush(
D2D1::ColorF(D2D1::ColorF::黑色),
&g_pBlackBrush
) ;
如果(失败(小时))
{
MessageBox(hWnd,“创建轮廓笔刷(黑色)失败!”,“错误”,0);
返回;
}
//定义渐变停止点
D2D1_梯度_停止梯度停止[2];
gradientStops[0]。color=D2D1::ColorF(D2D1::ColorF::Blue);
渐变停止[0]。位置=0.f;
gradientStops[1]。color=D2D1::ColorF(D2D1::ColorF::White);
渐变停止[1]。位置=1.f;
//创建渐变停止集合
ID2D1GradientStopCollection*pGradientStops=NULL;
hr=g_pRenderTarget->CreateGradientStopCollection(
梯度停止,
2.
D2D1_伽马_2_2,
D2D1_延伸_模式_夹具,
&pGradientStops
) ;
如果(失败(小时))
{
MessageBox(NULL,“创建梯度停止收集失败!”,“错误”,0);
}
//创建线性渐变笔刷以填充椭圆
hr=g_pRenderTarget->CreateAradialGradientBrush(
D2D1::RadialGradientBrushProperties(
D2D1::点2F(170170),
D2D1::点2F(0,0),
150,
150),
pGradientStops,
&g_pRadialGradientBrush
) ;
如果(失败(小时))
{
MessageBox(hWnd,“创建线性渐变笔刷失败!”,“错误”,0);
返回;
}
//创建2个椭圆。
对于(int i=0;iCreateEllipsegometry(g_Ellipse[i],&g_Pellipsarray[i]);
如果(失败(小时))
{
MessageBox(hWnd,“创建椭圆几何体失败!”,“错误”,0);
返回;
}
}
//创建几何图形组,两个圆组成一个组。
hr=g_pD2DFactory->CreateGeometryGroup(
D2D1_填充_模式_备用,
(ID2D1Geometry**)和g_Pellipsarray,
排列(g_Pellipsarray),
&g_pGeometryGroup
);
}
}
无效渲染(HWND HWND)
{
//旋转总角度
静态浮动总角度=0.0f;
//最后一次
静态DWORD lastTime=timeGetTime();
//获取当前时间
DWORD currentTime=timeGetTime();
//计算当前帧中经过的时间。
浮动时间增量=(浮动)(当前时间-上次时间)*0.1;
//按当前帧中经过的时间增加totalAngle。
总角度+=时间增量;
创建数据源(hwnd);
g_pRenderTarget->BeginDraw();
//将背景色清除为白色
g_pRenderTarget->Clear(D2D1::ColorF(D2D1::ColorF::White));
//绘制几何图形组
g_pRenderTarget->DrawGeometry(g_pGeometryGroup,g
#include <D2D1.h>
#define SAFE_RELEASE(P) if(P){P->Release() ; P = NULL ;}
const int GEOMETRY_COUNT = 2;
ID2D1Factory* g_pD2DFactory = NULL; // Direct2D factory
ID2D1HwndRenderTarget* g_pRenderTarget = NULL; // Render target
ID2D1SolidColorBrush* g_pBlackBrush = NULL; // Outline brush
ID2D1RadialGradientBrush* g_pRadialGradientBrush = NULL ; // Radial gradient brush
// 2 circle to build up a geometry group. this is the outline of the progress bar
D2D1_ELLIPSE g_Ellipse0 = D2D1::Ellipse(D2D1::Point2F(300, 300), 150, 150);
D2D1_ELLIPSE g_Ellipse1 = D2D1::Ellipse(D2D1::Point2F(300, 300), 200, 200);
D2D1_ELLIPSE g_Ellipse[GEOMETRY_COUNT] =
{
g_Ellipse0,
g_Ellipse1,
};
ID2D1EllipseGeometry* g_pEllipseArray[GEOMETRY_COUNT] = { NULL };
ID2D1GeometryGroup* g_pGeometryGroup = NULL;
VOID CreateD2DResource(HWND hWnd)
{
if (!g_pRenderTarget)
{
HRESULT hr ;
hr = D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED, &g_pD2DFactory) ;
if (FAILED(hr))
{
MessageBox(hWnd, "Create D2D factory failed!", "Error", 0) ;
return ;
}
// Obtain the size of the drawing area
RECT rc ;
GetClientRect(hWnd, &rc) ;
// Create a Direct2D render target
hr = g_pD2DFactory->CreateHwndRenderTarget(
D2D1::RenderTargetProperties(),
D2D1::HwndRenderTargetProperties(
hWnd,
D2D1::SizeU(rc.right - rc.left,rc.bottom - rc.top)
),
&g_pRenderTarget
) ;
if (FAILED(hr))
{
MessageBox(hWnd, "Create render target failed!", "Error", 0) ;
return ;
}
// Create the outline brush(black)
hr = g_pRenderTarget->CreateSolidColorBrush(
D2D1::ColorF(D2D1::ColorF::Black),
&g_pBlackBrush
) ;
if (FAILED(hr))
{
MessageBox(hWnd, "Create outline brush(black) failed!", "Error", 0) ;
return ;
}
// Define gradient stops
D2D1_GRADIENT_STOP gradientStops[2] ;
gradientStops[0].color = D2D1::ColorF(D2D1::ColorF::Blue) ;
gradientStops[0].position = 0.f ;
gradientStops[1].color = D2D1::ColorF(D2D1::ColorF::White) ;
gradientStops[1].position = 1.f ;
// Create gradient stops collection
ID2D1GradientStopCollection* pGradientStops = NULL ;
hr = g_pRenderTarget->CreateGradientStopCollection(
gradientStops,
2,
D2D1_GAMMA_2_2,
D2D1_EXTEND_MODE_CLAMP,
&pGradientStops
) ;
if (FAILED(hr))
{
MessageBox(NULL, "Create gradient stops collection failed!", "Error", 0);
}
// Create a linear gradient brush to fill in the ellipse
hr = g_pRenderTarget->CreateRadialGradientBrush(
D2D1::RadialGradientBrushProperties(
D2D1::Point2F(170, 170),
D2D1::Point2F(0, 0),
150,
150),
pGradientStops,
&g_pRadialGradientBrush
) ;
if (FAILED(hr))
{
MessageBox(hWnd, "Create linear gradient brush failed!", "Error", 0) ;
return ;
}
// Create the 2 ellipse.
for (int i = 0; i < GEOMETRY_COUNT; ++i)
{
hr = g_pD2DFactory->CreateEllipseGeometry(g_Ellipse[i], &g_pEllipseArray[i]);
if (FAILED(hr))
{
MessageBox(hWnd, "Create Ellipse Geometry failed!", "Error", 0);
return;
}
}
// Create the geometry group, the 2 circles make up a group.
hr = g_pD2DFactory->CreateGeometryGroup(
D2D1_FILL_MODE_ALTERNATE,
(ID2D1Geometry**)&g_pEllipseArray,
ARRAYSIZE(g_pEllipseArray),
&g_pGeometryGroup
);
}
}
VOID Render(HWND hwnd)
{
// total angle to rotate
static float totalAngle = 0.0f;
// Get last time
static DWORD lastTime = timeGetTime();
// Get current time
DWORD currentTime = timeGetTime();
// Calculate time elapsed in current frame.
float timeDelta = (float)(currentTime - lastTime) * 0.1;
// Increase the totalAngle by the time elapsed in current frame.
totalAngle += timeDelta;
CreateD2DResource(hwnd) ;
g_pRenderTarget->BeginDraw() ;
// Clear background color to White
g_pRenderTarget->Clear(D2D1::ColorF(D2D1::ColorF::White));
// Draw geometry group
g_pRenderTarget->DrawGeometry(g_pGeometryGroup, g_pBlackBrush);
// Roatate the gradient brush based on the total elapsed time
D2D1_MATRIX_3X2_F rotMatrix = D2D1::Matrix3x2F::Rotation(totalAngle, D2D1::Point2F(300, 300));
g_pRadialGradientBrush->SetTransform(rotMatrix);
// Fill geometry group with the transformed brush
g_pRenderTarget->FillGeometry(g_pGeometryGroup, g_pRadialGradientBrush);
HRESULT hr = g_pRenderTarget->EndDraw() ;
if (FAILED(hr))
{
MessageBox(NULL, "Draw failed!", "Error", 0) ;
return ;
}
// Update last time to current time for next loop
lastTime = currentTime;
}
VOID Cleanup()
{
SAFE_RELEASE(g_pRenderTarget) ;
SAFE_RELEASE(g_pBlackBrush) ;
SAFE_RELEASE(g_pGeometryGroup);
SAFE_RELEASE(g_pRadialGradientBrush);
for (int i = 0; i < GEOMETRY_COUNT; ++i)
{
SAFE_RELEASE(g_pEllipseArray[i]);
g_pEllipseArray[i] = NULL;
}
SAFE_RELEASE(g_pD2DFactory) ;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_PAINT:
Render(hwnd) ;
return 0 ;
case WM_KEYDOWN:
{
switch( wParam )
{
case VK_ESCAPE:
SendMessage( hwnd, WM_CLOSE, 0, 0 );
break ;
default:
break ;
}
}
break ;
case WM_DESTROY:
Cleanup();
PostQuitMessage( 0 );
return 0;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow )
{
WNDCLASSEX winClass ;
winClass.lpszClassName = "Direct2D";
winClass.cbSize = sizeof(WNDCLASSEX);
winClass.style = CS_HREDRAW | CS_VREDRAW;
winClass.lpfnWndProc = WndProc;
winClass.hInstance = hInstance;
winClass.hIcon = NULL ;
winClass.hIconSm = NULL ;
winClass.hCursor = LoadCursor(NULL, IDC_ARROW);
winClass.hbrBackground = NULL ;
winClass.lpszMenuName = NULL;
winClass.cbClsExtra = 0;
winClass.cbWndExtra = 0;
if (!RegisterClassEx (&winClass))
{
MessageBox ( NULL, TEXT( "This program requires Windows NT!" ), "error", MB_ICONERROR) ;
return 0 ;
}
HWND hwnd = CreateWindowEx(NULL,
"Direct2D", // window class name
"Circular Progressbar", // window caption
WS_OVERLAPPEDWINDOW, // window style
CW_USEDEFAULT, // initial x position
CW_USEDEFAULT, // initial y position
600, // initial x size
600, // initial y size
NULL, // parent window handle
NULL, // window menu handle
hInstance, // program instance handle
NULL) ; // creation parameters
ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;
MSG msg ;
ZeroMemory(&msg, sizeof(msg)) ;
while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}