将滚动条添加到MFC中的activeX控件 [英] Adding scrollbar to an activeX control in MFC

问题描述

我正在尝试使用Microsoft基础类库创建一个activeX控件.

I'm trying to create an activeX control using Microsoft Foundation Class Library.

我已经创建了控件.这是一个图形控件.我也在控件上放置了一些按钮.

I have created the control. It's a graph control. I have placed some buttons on the control as well.

我正在尝试使用CScrollBar类将滚动条添加到控件中.

I am trying to add a scrollbar to my control using CScrollBar class.

我使用CScrollBar::Create方法创建控件.在应用程序中使用我的activeX控件时，我可以看到该控件.

I create the control using CScrollBar::Create method. I can see the control when use my activeX control in an application.

我已经将OnHScroll方法添加到我的控件类中.这是从COleControl类派生的.

I have added the OnHScroll method to my control class. This derives from COleControl class .

滚动时，我使用CScrollBar::GetScrollPos来获取始终返回零的滚动位置.

When I scroll I use CScrollBar::GetScrollPos to get the scroll position which I always returns zero.

这是在activeX控件中创建滚动条的代码.

Here is the code for creating the scrollbar in activeX control.

MainClass.h文件中的控制代码:

Code for Control in MainClass.h file:

private:
CScrollBar m_HScrollBar;

protected:
afx_msg void OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar); 
DECLARE_MESSAGE_MAP()

用于创建滚动条的OnCreate()方法中MainClass.cpp中的控制代码:

Code for Control in MainClass.cpp in OnCreate() method for creating the scrollbar:

m_HScrollBar.Create(SBS_HORZ | WS_CHILD| WS_VISIBLE , CRect(rcBottomStrip.left  ,
rcBottomStrip.bottom  ,
rcBottomStrip.right ,
rcBottomStrip.bottom  + (tHeight*3)/125),this, 315);

m_HScrollBar.SetScrollRange(0, 2048);

SCROLLINFO ScrollInfo;
ScrollInfo.cbSize = sizeof(ScrollInfo);
ScrollInfo.fMask = SIF_RANGE;        
ScrollInfo.nMin = 0;                
ScrollInfo.nMax = 1128;              
ScrollInfo.nPage = 100;              
ScrollInfo.nPos = 0;                
ScrollInfo.nTrackPos = 0;          
m_HScrollBar.SetScrollInfo(&ScrollInfo);
m_HScrollBar.ShowScrollBar(TRUE);
m_HScrollBar.EnableWindow();
m_HScrollBar.EnableAutomation();

在OnHScroll方法中返回滚动位置并移动滚动条:

In OnHScroll method to return the scroll position and moving the scrollbar:

int CurPos = m_HScrollBar.GetScrollPos();
m_HScrollBar.SetScrollPos(CurPos);

推荐答案

我替换了CScrollBar并改用了HWND. 所以我的代码就这样改变了:

I replaced the CScrollBar and used HWND instead. So my code changed like this:

//MainClass.h

//MainClass.h

HWND m_wndHScrollBar;

//MainClass.cpp

//MainClass.cpp

m_wndHScrollBar = (CreateWindowEx( 
                    0,                      // no extended styles 
                    SCROLLBAR,           // scroll bar control class 
                    (PTSTR) NULL,           // no window text 
                    WS_CHILD | WS_VISIBLE   // window styles  
                        | SBS_HORZ,         // horizontal scroll bar style 
                    left,              // horizontal position 
                    bottom, // vertical position 
                    right,             // width of the scroll bar 
                    height,               // height of the scroll bar
                    m_hWnd,             // handle to main window 
                    (HMENU) ID_HSCROLLBAR,           // no menu 
                    GetModuleHandle(NULL),                // instance owning this window 
                    (PVOID) NULL            // pointer not needed 
                )); 

这篇关于将滚动条添加到MFC中的activeX控件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！