254 lines
12 KiB
C++
254 lines
12 KiB
C++
#ifndef __CHYPERLINK_INCLUDED__
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#define __CHYPERLINK_INCLUDED__
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//
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// スタティックコントロールをSubclass化してハイパーリンクをサポート
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//
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// Usage: CHyperLink hyperlink;
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// hyperlink.Attach( GetDlgItem( hWnd, IDC_URL ) );
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//
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class CHyperLink
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{
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public:
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CHyperLink() : m_hWnd(NULL), m_lpLabel(NULL),
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m_hCursor(NULL), m_hFont(NULL),
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m_lpHyperLink(NULL), m_lpfnOldWndProc(NULL)
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{
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}
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~CHyperLink()
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{
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Detach();
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}
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// コントロールにアタッチする
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BOOL Attach( HWND hWnd, LPCSTR lpLabel = NULL, LPCSTR lpHyperLink = NULL )
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{
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if( m_hWnd )
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return FALSE; // 既にAttach済み
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m_hWnd = hWnd;
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// 文字列をコピー
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if( lpLabel ) {
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m_lpLabel = new CHAR[::lstrlen(lpLabel)+1];
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::lstrcpy( m_lpLabel, lpLabel );
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::SendMessage( m_hWnd, WM_SETTEXT, 0, (LPARAM)m_lpLabel );
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}
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// 表示とハイパーリンクが同じ場合はハイパーリンクはラベルと同じに
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if( lpLabel && !lpHyperLink ) {
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m_lpHyperLink = new CHAR[::lstrlen(lpLabel)+1];
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::lstrcpy( m_lpHyperLink, lpLabel );
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}
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// ハイパーリンクが別の場合
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if( lpHyperLink ) {
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m_lpHyperLink = new CHAR[::lstrlen(lpHyperLink)+1];
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::lstrcpy( m_lpHyperLink, lpHyperLink );
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}
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// ポイントカーソル(無ければデフォルト)
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#ifndef IDC_HAND
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#define IDC_HAND MAKEINTRESOURCE(32649)
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#endif
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m_hCursor = ::LoadCursor( NULL, IDC_HAND );
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// アンダーラインフォントの作成
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HFONT m_hOldFont = (HFONT)::SendMessage( hWnd, WM_GETFONT, 0, 0 );
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LOGFONT lFont;
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::GetObject( m_hOldFont, sizeof(LOGFONT), &lFont );
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lFont.lfUnderline = TRUE;
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m_hFont = ::CreateFontIndirect( &lFont );
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// ラベルの表示領域を計算
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CalcLabelRectangle();
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// スタイルの変更(通知をイネーブルにする)
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DWORD dwStyle = ::GetWindowLong( hWnd, GWL_STYLE );
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dwStyle |= SS_NOTIFY;
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::SetWindowLong( hWnd, GWL_STYLE, (LONG)dwStyle );
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// コントロールのサブクラス化
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m_lpfnOldWndProc = (WNDPROC)::SetWindowLong( hWnd, GWL_WNDPROC, (LONG)HyperLinkProc );
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// Thisを埋め込む
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::SetWindowLong( hWnd, GWL_USERDATA, (LONG)this );
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return TRUE;
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}
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BOOL Detach()
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{
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if( m_hWnd ) {
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// サブクラス化を解除
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if( m_lpfnOldWndProc ) {
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::SetWindowLong( m_hWnd, GWL_WNDPROC, (LONG)m_lpfnOldWndProc );
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m_lpfnOldWndProc = NULL;
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}
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// フォントを削除
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if( m_hFont ) {
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::DeleteObject( (HGDIOBJ)m_hFont );
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m_hFont = NULL;
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}
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// 文字列を削除
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if( m_lpLabel ) {
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delete[] m_lpLabel;
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m_lpLabel = NULL;
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}
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if( m_lpHyperLink ) {
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delete[] m_lpHyperLink;
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m_lpHyperLink = NULL;
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}
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}
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m_hWnd = NULL;
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return TRUE;
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}
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BOOL SetLabel( LPCSTR lpLabel )
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{
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if( m_lpLabel ) {
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delete[] m_lpLabel;
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}
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m_lpLabel = new CHAR[::lstrlen(lpLabel)+1];
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::lstrcpy( m_lpLabel, lpLabel );
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// コントロールに文字列を設定
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::SendMessage( m_hWnd, WM_SETTEXT, 0, (LPARAM)m_lpLabel );
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// ラベルの表示領域を計算
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CalcLabelRectangle();
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}
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BOOL SetHyperLink( LPCSTR lpHyperLink )
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{
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if( m_lpHyperLink ) {
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delete[] m_lpHyperLink;
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}
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m_lpHyperLink = new CHAR[::lstrlen(lpHyperLink)+1];
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::lstrcpy( m_lpHyperLink, lpHyperLink );
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}
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protected:
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BOOL CalcLabelRectangle()
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{
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if( !::IsWindow(m_hWnd) )
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return FALSE;
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if( !m_lpLabel )
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return FALSE;
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RECT rcClient;
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::GetClientRect( m_hWnd, &rcClient );
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m_rcLabel = rcClient;
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HDC hDC = ::GetDC( m_hWnd );
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HFONT hOldFont = (HFONT)::SelectObject( hDC, m_hFont );
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// スタイル
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DWORD dwStyle = ::GetWindowLong( m_hWnd, GWL_STYLE );
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INT nDrawStyle = DT_LEFT;
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if( dwStyle && SS_CENTER ) {
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nDrawStyle = DT_CENTER;
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} else if( dwStyle && SS_RIGHT ) {
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nDrawStyle = DT_RIGHT;
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}
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// 文字列表示と描画領域の計算
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::DrawText( hDC, m_lpLabel, -1, &m_rcLabel, nDrawStyle | DT_WORDBREAK | DT_CALCRECT );
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::SelectObject( hDC, hOldFont );
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// スタイルによってオフセットを計算
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if( dwStyle & SS_CENTER ) {
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::OffsetRect( &m_rcLabel, (rcClient.right - m_rcLabel.right) / 2, 0 );
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} else if (dwStyle & SS_RIGHT) {
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::OffsetRect( &m_rcLabel, rcClient.right - m_rcLabel.right, 0 );
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}
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return true;
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}
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static LRESULT CALLBACK HyperLinkProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
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{
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CHyperLink* pHyperLink = reinterpret_cast<CHyperLink*>(::GetWindowLong( hWnd, GWL_USERDATA));
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switch( msg ) {
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case WM_DESTROY:
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{
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// 2003/10/11 リリース後にfix...
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WNDPROC pWndProcOld = pHyperLink->m_lpfnOldWndProc;
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pHyperLink->Detach();
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return CallWindowProc( pWndProcOld, hWnd, msg, wParam, lParam );
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}
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break;
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case WM_LBUTTONDOWN: {
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POINT pt = { LOWORD(lParam), HIWORD(lParam) };
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if( pHyperLink->m_lpLabel && pHyperLink->m_lpHyperLink ) {
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if( ::PtInRect( &pHyperLink->m_rcLabel, pt ) ) {
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::ShellExecute( hWnd, NULL, pHyperLink->m_lpHyperLink, NULL, NULL, SW_SHOWNORMAL );
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return TRUE;
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}
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}
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}
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break;
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case WM_MOUSEMOVE: {
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POINT pt = { LOWORD(lParam), HIWORD(lParam) };
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if( pHyperLink->m_lpLabel && pHyperLink->m_lpHyperLink ) {
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if( pHyperLink->m_hCursor && ::PtInRect( &pHyperLink->m_rcLabel, pt ) ) {
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::SetCursor( pHyperLink->m_hCursor );
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return TRUE;
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}
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}
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}
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break;
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case WM_PAINT: {
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PAINTSTRUCT ps;
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HDC hDC = ::BeginPaint( hWnd, &ps );
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DWORD dwStyle = ::GetWindowLong( hWnd, GWL_STYLE );
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INT nDrawStyle = DT_LEFT;
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if( dwStyle && SS_CENTER ) {
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nDrawStyle = DT_CENTER;
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} else if( dwStyle && SS_RIGHT ) {
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nDrawStyle = DT_RIGHT;
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}
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// アトリビュート
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::SetBkMode( hDC, TRANSPARENT );
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::SetTextColor( hDC, 0x00FF0000 );
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// 文字列表示
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if( pHyperLink->m_lpLabel ) {
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HFONT hOldFont = (HFONT)::SelectObject( hDC, pHyperLink->m_hFont );
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::DrawText( hDC, pHyperLink->m_lpLabel, -1, &pHyperLink->m_rcLabel, nDrawStyle | DT_WORDBREAK );
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::SelectObject( hDC, hOldFont );
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}
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::EndPaint( hWnd, &ps );
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}
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return TRUE;
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default:
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break;
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}
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return CallWindowProc( pHyperLink->m_lpfnOldWndProc, hWnd, msg, wParam, lParam );
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}
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HWND m_hWnd;
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HFONT m_hFont;
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HFONT m_hOldFont;
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HCURSOR m_hCursor;
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WNDPROC m_lpfnOldWndProc;
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RECT m_rcLabel;
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LPSTR m_lpLabel;
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LPSTR m_lpHyperLink;
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private:
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};
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#endif // !__CHYPERLINK_INCLUDED__
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