具有报表样式的CListCtrl中的多行文本 [英] Multiline text in CListCtrl with Report Style

问题描述

我有CListCtrl类型的报告.
我需要在其中输入多行文字.

I have CListCtrl type report.
I need to write into it''s items multiline text.

How can i achieve this?

推荐答案

您必须实现自己的CListCtrl
派生形式.
覆盖其对WM_MEASUREITEM和WM_DRAWITEM的反应:)

You have to implement an own derivation of CListCtrl

to overwrite its reactions for WM_MEASUREITEM and WM_DRAWITEM :)

class CYourCtrl : public CListCtrl
{
public:
  CYourCtrl();
  virtual ~CYourCtrl();
protected: 
  //{{AFX_MSG(CYourCtrl) 
  virtual void DrawItem       (LPDRAWITEMSTRUCT);
  afx_msg void MeasureItem    (LPMEASUREITEMSTRUCT);    
  //}}AFX_MSG
  DECLARE_MESSAGE_MAP()
};

...
BEGIN_MESSAGE_MAP(CYourCtrl, CListCtrl)
    ON_WM_MEASUREITEM_REFLECT()    
END_MESSAGE_MAP()

//
void CYourCtrl::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
  if (lpMeasureItemStruct) {
    lpMeasureItemStruct->itemHeight = ...; // set your hight here
  }
}

请记住设置LVS_OWNERDRAWFIXED
在创建控件或在.rc文件中时:)

Please remember to set the LVS_OWNERDRAWFIXED
at creating of your control or in your .rc file :)

默认情况下，CListCtrl不会在多行模式下绘制其文本.
这就是为什么您也需要以下功能的原因:):

By default CListCtrl does not draw its textes in the multiline mode.
That is why you need the following function too :) :

void CYourCtrl::DrawItem(LPDRAWITEMSTRUCT pDIS)
{
  if (pDIS) {
    // the first step
    if (ODA_DRAWENTIRE == pDIS->itemAction) {
      // Draw your content here
    }
    // there are other cases too :)
  }
}

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