OwnerDraw Listbox

// OwnerDrawListBox.cpp : implementation file // #include "stdafx.h" #include "OwnerDrawListBox.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // COwnerDrawListBox COwnerDrawListBox::COwnerDrawListBox() { } COwnerDrawListBox::~COwnerDrawListBox() { } BEGIN_MESSAGE_MAP(COwnerDrawListBox, CListBox) //{{AFX_MSG_MAP(COwnerDrawListBox) ON_WM_DROPFILES() //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // COwnerDrawListBox message handlers // Delete the Pointer which holds the List Box Data Items void COwnerDrawListBox::Destroy() { int ItemCount; ItemCount = GetCount(); if (ItemCount != 0) for (int i = 0; i < ItemCount; i++) { m_pListBoxDataItems = (DataItems*) GetItemDataPtr(i); delete m_pListBoxDataItems; } } // This is where is handle the Drag and Drop Event void COwnerDrawListBox::OnDropFiles(HDROP hDropInfo) { char strFileName[MAX_PATH], strDrive[MAX_PATH], strDir[MAX_PATH], strExt[MAX_PATH]; char szFilePath[MAX_PATH]; ::DragQueryFile (hDropInfo, 0, szFilePath, sizeof (szFilePath)); HICON h = ::ExtractIcon(NULL,szFilePath,0); // This function splits the whole path into Drive, Dir, File Name and Extension ::_splitpath(szFilePath, strDrive, strDir, strFileName, strExt); if (h) { // After getting the the Icon handle and the Icon file name, // Add them to the list box Add(strFileName,h); } SetCurSel(this->GetCount()-1); ::DragFinish(hDropInfo); } void COwnerDrawListBox::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct) { // Changes the Width and the Height of item in the list box lpMeasureItemStruct->itemHeight = 40; lpMeasureItemStruct->itemWidth = 100; } void COwnerDrawListBox::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) { CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC); CRect *rectIcon, *rectText; COLORREF crOldTextColor = pDC->GetTextColor(); COLORREF crOldBkColor = pDC->GetBkColor(); m_rectListBoxItem = lpDrawItemStruct->rcItem; // Returns the required struct which holds the Data (Text ,Icon) to be drawn DataItems *pListDataItem = (DataItems *)GetItemDataPtr(lpDrawItemStruct->itemID); // Setting the Text and icon Position in the List Box // Checking if the User choose to set the text position as he supposed to do so, // then see whether if the user has set the icon to the right position or not // If yes the text and the icon rects are set to different position // if no the text and the icon rects are set to the same position // Checking if the User choose to set the Icon position as he supposed to do so, // then see whether if the user has set the text to the right position or not // If yes the text and the icon rects are set to different position // if no the text and the icon rects are set to the same position if (m_TextPos == ITEM_RIGHT ) { if (m_IconPos == ITEM_LEFT) { // Set the Text on the right and the Icon on the left, if the user chooses so rectIcon = new CRect(m_rectListBoxItem.left,m_rectListBoxItem.top,m_rectListBoxItem.left+40,m_rectListBoxItem.top+40); rectText = new CRect(rectIcon->right-40,m_rectListBoxItem.top,m_rectListBoxItem.right-20,m_rectListBoxItem.bottom); }else { // If the user set the icon position on the right as he set the text, // draw the text and the icon on the same side rectIcon = new CRect(m_rectListBoxItem.left+100,m_rectListBoxItem.top,m_rectListBoxItem.right,m_rectListBoxItem.bottom); rectText = new CRect(m_rectListBoxItem.left+40,m_rectListBoxItem.top,m_rectListBoxItem.right-20,m_rectListBoxItem.bottom); } }else if (m_TextPos == ITEM_LEFT ) { if (m_IconPos == ITEM_RIGHT) { // Set the Text on the left and the Icon on the right, if the user chooses so rectText = new CRect(m_rectListBoxItem.left+10,m_rectListBoxItem.top,m_rectListBoxItem.left+100,m_rectListBoxItem.bottom); rectIcon = new CRect(rectText->right,m_rectListBoxItem.top,m_rectListBoxItem.right,m_rectListBoxItem.bottom); }else { // If the user set the icon position on the left as he set the text, // draw the text and the icon on the same side rectText = new CRect(m_rectListBoxItem.left+10,m_rectListBoxItem.top,m_rectListBoxItem.left+100,m_rectListBoxItem.bottom); rectIcon = new CRect(m_rectListBoxItem.left+10,m_rectListBoxItem.top,m_rectListBoxItem.left+100,m_rectListBoxItem.bottom); } }else if ( m_IconPos == ITEM_RIGHT) { if ( m_TextPos == ITEM_LEFT) { // Set the Text on the left and the Icon on the right, if the user chooses so rectText = new CRect(m_rectListBoxItem.left+10,m_rectListBoxItem.top,m_rectListBoxItem.left+100,m_rectListBoxItem.bottom); rectIcon = new CRect(rectText->right,m_rectListBoxItem.top,m_rectListBoxItem.right,m_rectListBoxItem.bottom); } else { // If the user set the icon position on the left as he set the text, // draw the text and the icon on the same side rectIcon = new CRect(m_rectListBoxItem.left+100,m_rectListBoxItem.top,m_rectListBoxItem.right,m_rectListBoxItem.bottom); rectText = new CRect(m_rectListBoxItem.left+40,m_rectListBoxItem.top,m_rectListBoxItem.right-20,m_rectListBoxItem.bottom); } } else if ( m_IconPos == ITEM_LEFT) { if ( m_TextPos == ITEM_RIGHT) { // Set the text on the right and the icon on the left, if the user chooses so rectIcon = new CRect(m_rectListBoxItem.left,m_rectListBoxItem.top,m_rectListBoxItem.left+40,m_rectListBoxItem.top+40); rectText = new CRect(rectIcon->right-40,m_rectListBoxItem.top,m_rectListBoxItem.right-20,m_rectListBoxItem.bottom); } else { // If the user set the icon position on the right as he set the text, // draw the text and the icon on the same side rectText = new CRect(m_rectListBoxItem.left+10,m_rectListBoxItem.top,m_rectListBoxItem.left+100,m_rectListBoxItem.bottom); rectIcon = new CRect(m_rectListBoxItem.left+10,m_rectListBoxItem.top,m_rectListBoxItem.left+100,m_rectListBoxItem.bottom); } } else { // If the user didnt set the Icon or the Text positions, draw them to the default positions // The text default position is on the right and the Icon default position is on the left rectIcon = new CRect(m_rectListBoxItem.left,m_rectListBoxItem.top,m_rectListBoxItem.left+40,m_rectListBoxItem.bottom); rectText = new CRect(rectIcon->right-40,m_rectListBoxItem.top,m_rectListBoxItem.right-20,m_rectListBoxItem.bottom); } // If the List box has the focus, // draw around the first item the focus rect, which is a black dotted rectangle if((lpDrawItemStruct->itemAction | ODA_FOCUS) && (lpDrawItemStruct->itemState & ODS_FOCUS)) { CRect rect(m_rectListBoxItem); pDC->DrawFocusRect(m_rectListBoxItem); } // If the user has selected an item from the list box, or the selection has been changed // draw the item of the list box and fill it with the color of selected item else if ((lpDrawItemStruct->itemAction | ODA_SELECT) && (lpDrawItemStruct->itemState & ODS_SELECTED)) { CRect rect(m_rectListBoxItem); // Fill the item rect with the highlight blue color pDC->FillSolidRect(&lpDrawItemStruct->rcItem,::GetSysColor(COLOR_HIGHLIGHT)); // Set the color of the background of the text rect pDC->SetBkColor(::GetSysColor(COLOR_HIGHLIGHT)); // Set the color of the text pDC->SetTextColor(::GetSysColor(COLOR_HIGHLIGHTTEXT)); // If the user has chosen to set the text and the icon position, draw both // If the user has chosen to set the text position only, draw the text only // If the user has chosen to set the icon position only, draw the icon only if ( m_TextPos == ITEM_LEFT ) {