src/generic/hyperlink.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/hyperlink.cpp
   3 // Purpose:     Hyperlink control
   4 // Author:      David Norris <danorris@gmail.com>, Otto Wyss
   5 // Modified by: Ryan Norton, Francesco Montorsi
   6 // Created:     04/02/2005
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2005 David Norris
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 //---------------------------------------------------------------------------
  17 // Pre-compiled header stuff
  18 //---------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_HYPERLINKCTRL
  28
  29 //---------------------------------------------------------------------------
  30 // Includes
  31 //---------------------------------------------------------------------------
  32
  33 #include "wx/hyperlink.h"
  34
  35 #ifndef WX_PRECOMP
  36     #include "wx/utils.h" // for wxLaunchDefaultBrowser
  37     #include "wx/dcclient.h"
  38     #include "wx/menu.h"
  39     #include "wx/log.h"
  40     #include "wx/dataobj.h"
  41 #endif
  42
  43 #include "wx/clipbrd.h"
  44
  45 // ============================================================================
  46 // implementation
  47 // ============================================================================
  48
  49 IMPLEMENT_DYNAMIC_CLASS(wxHyperlinkCtrl, wxControl)
  50 IMPLEMENT_DYNAMIC_CLASS(wxHyperlinkEvent, wxCommandEvent)
  51 DEFINE_EVENT_TYPE(wxEVT_COMMAND_HYPERLINK)
  52
  53 // reserved for internal use only
  54 #define wxHYPERLINKCTRL_POPUP_COPY_ID           16384
  55
  56 const wxChar wxHyperlinkCtrlNameStr[] = wxT("hyperlink");
  57
  58 // ----------------------------------------------------------------------------
  59 // wxHyperlinkCtrl
  60 // ----------------------------------------------------------------------------
  61
  62 BEGIN_EVENT_TABLE(wxHyperlinkCtrl, wxControl)
  63     EVT_PAINT(wxHyperlinkCtrl::OnPaint)
  64     EVT_LEFT_DOWN(wxHyperlinkCtrl::OnLeftDown)
  65     EVT_LEFT_UP(wxHyperlinkCtrl::OnLeftUp)
  66     EVT_RIGHT_UP(wxHyperlinkCtrl::OnRightUp)
  67     EVT_MOTION(wxHyperlinkCtrl::OnMotion)
  68     EVT_LEAVE_WINDOW(wxHyperlinkCtrl::OnLeaveWindow)
  69     EVT_SIZE(wxHyperlinkCtrl::OnSize)
  70
  71     // for the context menu
  72     EVT_MENU(wxHYPERLINKCTRL_POPUP_COPY_ID, wxHyperlinkCtrl::OnPopUpCopy)
  73 END_EVENT_TABLE()
  74
  75 bool wxHyperlinkCtrl::Create(wxWindow *parent, wxWindowID id,
  76     const wxString& label, const wxString& url, const wxPoint& pos,
  77     const wxSize& size, long style, const wxString& name)
  78 {
  79     wxASSERT_MSG(!url.empty() || !label.empty(),
  80                  wxT("Both URL and label are empty ?"));
  81
  82 #ifdef __WXDEBUG__
  83     int alignment = (int)((style & wxHL_ALIGN_LEFT) != 0) +
  84                     (int)((style & wxHL_ALIGN_CENTRE) != 0) +
  85                     (int)((style & wxHL_ALIGN_RIGHT) != 0);
  86     wxASSERT_MSG(alignment == 1,
  87         wxT("Specify exactly one align flag!"));
  88 #endif
  89
  90     if (!wxControl::Create(parent, id, pos, size, style, wxDefaultValidator, name))
  91         return false;
  92
  93     // set to non empty strings both the url and the label
  94     if(url.empty())
  95         SetURL(label);
  96     else
  97         SetURL(url);
  98
  99     if(label.empty())
 100         SetLabel(url);
 101     else
 102         SetLabel(label);
 103
 104     m_rollover = false;
 105     m_clicking = false;
 106     m_visited = false;
 107
 108     // colours
 109     m_normalColour = *wxBLUE;
 110     m_hoverColour = *wxRED;
 111     SetForegroundColour(m_normalColour);
 112
 113     // by default the font of an hyperlink control is underlined
 114     wxFont f = GetFont();
 115     f.SetUnderlined(true);
 116     SetFont(f);
 117
 118     SetBestFittingSize(size);
 119
 120     return true;
 121 }
 122
 123 wxSize wxHyperlinkCtrl::DoGetBestSize() const
 124 {
 125     int w, h;
 126
 127     wxClientDC dc((wxWindow *)this);
 128     dc.SetFont(GetFont());
 129     dc.GetTextExtent(GetLabel(), &w, &h);
 130
 131     wxSize best(w, h);
 132     CacheBestSize(best);
 133     return best;
 134 }
 135
 136
 137 void wxHyperlinkCtrl::SetNormalColour(const wxColour &colour)
 138 {
 139     m_normalColour = colour;
 140     if (!m_visited)
 141     {
 142         SetForegroundColour(m_normalColour);
 143         Refresh();
 144     }
 145 }
 146
 147 void wxHyperlinkCtrl::SetVisitedColour(const wxColour &colour)
 148 {
 149     m_visitedColour = colour;
 150     if (m_visited)
 151     {
 152         SetForegroundColour(m_visitedColour);
 153         Refresh();
 154     }
 155 }
 156
 157 void wxHyperlinkCtrl::DoContextMenu(const wxPoint &pos)
 158 {
 159     wxMenu *menuPopUp = new wxMenu(wxEmptyString, wxMENU_TEAROFF);
 160     menuPopUp->Append(wxHYPERLINKCTRL_POPUP_COPY_ID, wxT("Copy URL"));
 161     PopupMenu( menuPopUp, pos );
 162     delete menuPopUp;
 163 }
 164
 165 wxRect wxHyperlinkCtrl::GetLabelRect() const
 166 {
 167     // our best size is always the size of the label without borders
 168     wxSize c(GetClientSize()), b(GetBestSize());
 169     wxPoint offset;
 170
 171     // the label is always centered vertically
 172     offset.y = (c.GetHeight()-b.GetHeight())/2;
 173
 174     if (HasFlag(wxHL_ALIGN_CENTRE))
 175         offset.x = (c.GetWidth()-b.GetWidth())/2;
 176     else if (HasFlag(wxHL_ALIGN_RIGHT))
 177         offset.x = c.GetWidth()-b.GetWidth();
 178     else if (HasFlag(wxHL_ALIGN_LEFT))
 179         offset.x = 0;
 180     return wxRect(offset, b);
 181 }
 182
 183
 184
 185 // ----------------------------------------------------------------------------
 186 // wxHyperlinkCtrl - event handlers
 187 // ----------------------------------------------------------------------------
 188
 189 void wxHyperlinkCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
 190 {
 191     wxPaintDC dc(this);
 192     dc.SetFont(GetFont());
 193     dc.SetTextForeground(GetForegroundColour());
 194     dc.SetTextBackground(GetBackgroundColour());
 195
 196     dc.DrawText(GetLabel(), GetLabelRect().GetTopLeft());
 197 }
 198
 199 void wxHyperlinkCtrl::OnLeftDown(wxMouseEvent& event)
 200 {
 201     // the left click must start from the hyperlink rect
 202     m_clicking = GetLabelRect().Contains(event.GetPosition());
 203 }
 204
 205 void wxHyperlinkCtrl::OnLeftUp(wxMouseEvent& event)
 206 {
 207     // the click must be started and ended in the hyperlink rect
 208     if (!m_clicking || !GetLabelRect().Contains(event.GetPosition()))
 209         return;
 210
 211     SetForegroundColour(m_visitedColour);
 212     m_visited = true;
 213     m_clicking = false;
 214
 215     // send the event
 216     wxHyperlinkEvent linkEvent(this, GetId(), m_url);
 217     if (!GetEventHandler()->ProcessEvent(linkEvent))     // was the event skipped ?
 218         if (!wxLaunchDefaultBrowser(m_url))
 219             wxLogWarning(wxT("Could not launch the default browser with url '%s' !"), m_url.c_str());
 220 }
 221
 222 void wxHyperlinkCtrl::OnRightUp(wxMouseEvent& event)
 223 {
 224     if( GetWindowStyle() & wxHL_CONTEXTMENU )
 225         if ( GetLabelRect().Contains(event.GetPosition()) )
 226             DoContextMenu(wxPoint(event.m_x, event.m_y));
 227 }
 228
 229 void wxHyperlinkCtrl::OnMotion(wxMouseEvent& event)
 230 {
 231     wxRect textrc = GetLabelRect();
 232
 233     if (textrc.Contains(event.GetPosition()))
 234     {
 235         SetCursor(wxCursor(wxCURSOR_HAND));
 236         SetForegroundColour(m_hoverColour);
 237         m_rollover = true;
 238         Refresh();
 239     }
 240     else if (m_rollover)
 241     {
 242         SetCursor(*wxSTANDARD_CURSOR);
 243         SetForegroundColour(!m_visited ? m_normalColour : m_visitedColour);
 244         m_rollover = false;
 245         Refresh();
 246     }
 247 }
 248
 249 void wxHyperlinkCtrl::OnLeaveWindow(wxMouseEvent& WXUNUSED(event) )
 250 {
 251     // NB: when the label rect and the client size rect have the same
 252     //     height this function is indispensable to remove the "rollover"
 253     //     effect as the OnMotion() event handler could not be called
 254     //     in that case moving the mouse out of the label vertically...
 255
 256     if (m_rollover)
 257     {
 258         SetCursor(*wxSTANDARD_CURSOR);
 259         SetForegroundColour(!m_visited ? m_normalColour : m_visitedColour);
 260         m_rollover = false;
 261         Refresh();
 262     }
 263 }
 264
 265 void wxHyperlinkCtrl::OnPopUpCopy( wxCommandEvent& WXUNUSED(event) )
 266 {
 267 #if wxUSE_CLIPBOARD
 268     if (!wxTheClipboard->Open())
 269         return;
 270
 271     wxTextDataObject *data = new wxTextDataObject( m_url );
 272     wxTheClipboard->SetData( data );
 273     wxTheClipboard->Close();
 274 #endif // wxUSE_CLIPBOARD
 275 }
 276
 277 void wxHyperlinkCtrl::OnSize(wxSizeEvent& WXUNUSED(event))
 278 {
 279     // update the position of the label in the screen respecting
 280     // the selected align flag
 281     Refresh();
 282 }
 283
 284 #endif // wxUSE_HYPERLINKCTRL