Win32 自绘控件按钮类

今天学了控件的自绘,初步偿试了下,蹂躏的不行不行的,查了好多的资料,头都弄大了,

有好多还是没弄明白,只是初步实现一个按钮的基本功能,好难呀,

先看下效果:

按下状态

弹起状态

按钮2按下状态

按钮2弹起状态

因好多不明白,先把WM_PAIN消息中绘图代码先发上来,以后弄好了再说

子类实现了WM_PAIN,WM_LBUTTONDOWN,WM_LBUTTONUP,现在就实现了这三个消息

还有一个修改文本颜色SetTxtColor,和修改背景色SetBkColor,

LRESULT ChildButton::OnPaint(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    PAINTSTRUCT ps;
    HDC hdc = BeginPaint(hWnd, &ps);
    //创建新画笔
    HPEN hNewPen = CreatePen(PS_SOLID, 2, RGB(0, 0, 0));
    //将新画笔选入DC中
    HPEN hOldPen = (HPEN)SelectObject(hdc, hNewPen);
    //设置文字背景为透明模式
    SetBkMode(hdc, TRANSPARENT);
    //设置文本前景色(即文本颜色),m_TxtColr为成员变量,由外界传入
    SetTextColor(hdc, m_TxtColor); //按钮上的文字颜色


    //获得按钮窗口大小
    RECT rect;
    GetClientRect(hWnd, &rect);
    //获得按钮窗口上的文本
    TCHAR tchar[128] = { 0 };
    GetWindowText(hWnd, tchar, 128);

    //按钮的两种样式,按下与弹起
    if (m_IsBtDown == FALSE)//弹起样式
    {
        //获取按钮背景颜色,
        COLORREF color = m_BkColor;
        HBRUSH hBrush1 = CreateSolidBrush(color);
        HBRUSH hOldBrush = (HBRUSH)SelectObject(hdc, hBrush1);
        
        //画按钮边框,弹起样式为下边和左边的边框能看见,另两边就移到窗口外了

        //判断是否是圆角按钮,
        if (m_IsRng)
        {
            //是就画圆角矩形
            RoundRect(hdc, -2, -2, rect.right - rect.left - 2,
                rect.bottom - rect.top - 2, 20, 20);
        }
        else
        {
            //不是就画矩形
            Rectangle(hdc, -2, -2, rect.right - rect.left,
                rect.bottom - rect.top);
        }
        int n = DrawText(hdc, tchar, _tcslen(tchar), &rect,
            DT_CENTER | DT_VCENTER | DT_SINGLELINE | DT_END_ELLIPSIS);

        SelectObject(hdc, hOldBrush);
        DeleteObject(hBrush1);
    }
    else   //按下状态样式
    {
        //创建以背景色+5的画刷
        COLORREF color = m_BkColor + 5;
        HBRUSH hBrush1 = CreateSolidBrush(color);
        HBRUSH hOldBrush = (HBRUSH)SelectObject(hdc, hBrush1);


        //绘制边框,按下样式为上边和右边为看得见的边框,另两边一样也移动窗口外
        //判断是否是圆角形状
        if (m_IsRng)//是圆角
        {
            //画圆角矩形
            RoundRect(hdc, 1, 1, rect.right - rect.left + 2,
                rect.bottom - rect.top + 2, 20, 20);
        }
        else
        {
            //不是就画直角矩形
            Rectangle(hdc, 1, 1, rect.right - rect.left + 2,
                rect.bottom - rect.top + 2);
        }
        //文字矩形区域偏移,(这是向下偏移2个单位)
        OffsetRect(&rect, 0, 2);
        //绘制文本
        DrawText(hdc, tchar, _tcslen(tchar), &rect,
            DT_CENTER | DT_VCENTER | DT_SINGLELINE | DT_END_ELLIPSIS);

        //释放画笔,画刷等资源        
        SelectObject(hdc, hOldBrush);
        DeleteObject(hBrush1);
        
    }
　

//释放画笔,画刷等资源　

SelectObject(hdc, hOldPen);

DeleteObject(hNewPen);

EndPaint(hWnd, &ps); return LRESULT(); }

基类的声明:

class MyButton
{
public:
    MyButton();
public:
    BOOL CreateEx(const LPCTSTR lpClssName, LPRECT lpRect, HWND hParent, UINT uID);
    static LRESULT CALLBACK lpButtonProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam);
    LRESULT ButtonProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
    void SetIsDown(BOOL bol);
    LRESULT DefaulMsg(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

    virtual void SetRectRgn(int nWidth,int nHeight);　　//设置是否为圆角按钮
    virtual void SetBkColor(COLORREF cor);　　　　　　　　//设置按钮背景色
    virtual void SetTxtColor(COLORREF cor);　　　　　　　　//设置文本颜色

public:
    BOOL m_IsBtDown;
    BOOL m_IsRng;
    HWND m_hWnd;
    WNDPROC m_lpfnOldWndproc;
    RECT m_Rect;
    UINT m_ID;
    COLORREF m_BkColor;
    COLORREF m_TxtColor;
public:
    //virtual LRESULT OnCreate(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
    virtual LRESULT OnPaint(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
    virtual LRESULT OnLButtonUp(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
    virtual LRESULT OnLButtonDown(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
    
};

在父窗口中调用,我创建的是对话框为主窗口,所以创建子窗口在WM_INITDIALOG消息中,如是自己创建的窗口类,

就应放在WM_CREATE消息中创建子窗口

INT_PTR OnInitDialog(HWND hWnd, WPARAM wParam, LPARAM lParam)
{
　　//我弄了好久,只能在创建前设置颜色,创建完了怎么也设置不了,
　　//不知道哪没弄对,

    btn = new ChildButton();
    btn->SetBkColor(RGB(0, 255, 0));
    btn->SetTxtColor(RGB(255, 0, 0));
    RECT rect = { 10,10,120,35 };
    btn->CreateEx(TEXT("Button1"), &rect, hWnd, 10001);
    //btn->SetRectRgn(20,20);
    

    pBtn2 = new ChildButton();
    RECT rect2 = { 10,50,120,75 };
    pBtn2->CreateEx(TEXT("Button2"), &rect2, hWnd, 10002);    
    pBtn2->SetRectRgn(20,20);

    return FALSE;
}