src/Utils/MiscUI/ScrollTool.cpp

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2003-2006,2009-2010, 2012 - TortoiseSVN
   4
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License
   7 // as published by the Free Software Foundation; either version 2
   8 // of the License, or (at your option) any later version.
   9
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software Foundation,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19 #include "stdafx.h"
  20 #include "ScrollTool.h"
  21
  22
  23 CScrollTool::CScrollTool()
  24         : m_bInitCalled(false)
  25         , m_bRightAligned(false)
  26 {
  27         SecureZeroMemory(&ti, sizeof(ti));
  28 }
  29
  30 CScrollTool::~CScrollTool()
  31 {
  32 }
  33
  34
  35 BEGIN_MESSAGE_MAP(CScrollTool, CWnd)
  36 END_MESSAGE_MAP()
  37
  38
  39 bool CScrollTool::Init(LPPOINT pos, bool bRightAligned /* = false */)
  40 {
  41         if (!m_bInitCalled)
  42         {
  43                 // create the tooltip window
  44                 if (!CreateEx(WS_EX_TOPMOST,
  45                                          TOOLTIPS_CLASS,
  46                                          NULL,
  47                                          TTS_NOPREFIX | TTS_ALWAYSTIP,
  48                                          CW_USEDEFAULT,
  49                                          CW_USEDEFAULT,
  50                                          CW_USEDEFAULT,
  51                                          CW_USEDEFAULT,
  52                                          NULL,
  53                                          NULL,
  54                                          NULL))
  55                 {
  56                         return false;
  57                 }
  58
  59                 ti.cbSize = sizeof(TOOLINFO);
  60                 ti.uFlags = TTF_TRACK;
  61                 ti.hwnd = NULL;
  62                 ti.hinst = NULL;
  63                 ti.uId = 0;
  64                 ti.lpszText = _T(" ");
  65
  66                 // ToolTip control will cover the whole window
  67                 ti.rect.left = 0;
  68                 ti.rect.top = 0;
  69                 ti.rect.right = 0;
  70                 ti.rect.bottom = 0;
  71
  72                 CPoint point;
  73                 ::GetCursorPos(&point);
  74
  75                 SendMessage(TTM_ADDTOOL, 0, (LPARAM) (LPTOOLINFO) &ti);
  76
  77                 SendMessage(TTM_TRACKPOSITION, 0, (LPARAM)(DWORD) MAKELONG(point.x, point.y));
  78                 SendMessage(TTM_TRACKACTIVATE, true, (LPARAM)(LPTOOLINFO) &ti);
  79                 SendMessage(TTM_TRACKPOSITION, 0, MAKELONG(pos->x, pos->y));
  80                 m_bRightAligned = bRightAligned;
  81                 m_bInitCalled = true;
  82         }
  83         return true;
  84 }
  85
  86 void CScrollTool::SetText(LPPOINT pos, const TCHAR * fmt, ...)
  87 {
  88         CString s;
  89         va_list marker;
  90
  91         va_start( marker, fmt );
  92         s.FormatV(fmt, marker);
  93         va_end( marker );
  94
  95         CSize textsize(0);
  96         if (m_bRightAligned)
  97         {
  98                 CDC *pDC = GetDC();
  99                 textsize = pDC->GetTextExtent(s);
 100                 ReleaseDC(pDC);
 101         }
 102
 103         ti.lpszText = s.GetBuffer();
 104         SendMessage(TTM_UPDATETIPTEXT, 0, (LPARAM)(LPTOOLINFO) &ti);
 105         SendMessage(TTM_TRACKPOSITION, 0, MAKELONG(pos->x-textsize.cx, pos->y));
 106         s.ReleaseBuffer();
 107 }
 108
 109 void CScrollTool::Clear()
 110 {
 111         if (m_bInitCalled)
 112         {
 113                 SendMessage(TTM_DELTOOL, 0, (LPARAM)(LPTOOLINFO) &ti);
 114                 DestroyWindow();
 115         }
 116         m_bInitCalled = false;
 117 }
 118
 119 LONG CScrollTool::GetTextWidth(LPCTSTR szText)
 120 {
 121         CDC *pDC = GetDC();
 122         CSize textsize = pDC->GetTextExtent(szText, (int)_tcslen(szText));
 123         ReleaseDC(pDC);
 124         return textsize.cx;
 125 }