include/wx/hyperlink.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/hyperlink.h
   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 #ifndef _WX_HYPERLINK_H__
  13 #define _WX_HYPERLINK_H__
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_HYPERLINKCTRL
  18
  19 #include "wx/control.h"
  20
  21 // ----------------------------------------------------------------------------
  22 // constants
  23 // ----------------------------------------------------------------------------
  24
  25 #define wxHL_CONTEXTMENU        0x0001
  26 #define wxHL_DEFAULT_STYLE      wxHL_CONTEXTMENU|wxNO_BORDER
  27
  28 extern WXDLLEXPORT_DATA(const wxChar) wxHyperlinkCtrlNameStr[];
  29
  30
  31 // ----------------------------------------------------------------------------
  32 // wxHyperlinkCtrl
  33 // ----------------------------------------------------------------------------
  34
  35 // A static text control that emulates a hyperlink. The link is displayed
  36 // in an appropriate text style, derived from the control's normal font.
  37 // When the mouse rolls over the link, the cursor changes to a hand and the
  38 // link's color changes to the active color.
  39 //
  40 // Clicking on the link does not launch a web browser; instead, a
  41 // HyperlinkEvent is fired. The event propagates upward until it is caught,
  42 // just like a wxCommandEvent.
  43 //
  44 // Use the EVT_HYPERLINK() to catch link events.
  45 class WXDLLIMPEXP_CORE wxHyperlinkCtrl : public wxControl
  46 {
  47 public:
  48     // Default constructor (for two-step construction).
  49     wxHyperlinkCtrl() { }
  50
  51     // Constructor.
  52     wxHyperlinkCtrl(wxWindow *parent,
  53                     wxWindowID id,
  54                     const wxString& label, const wxString& url,
  55                     const wxPoint& pos = wxDefaultPosition,
  56                     const wxSize& size = wxDefaultSize,
  57                     long style = wxHL_DEFAULT_STYLE,
  58                     const wxString& name = wxHyperlinkCtrlNameStr)
  59     {
  60         (void)Create(parent, id, label, url, pos, size, style, name);
  61     }
  62
  63     // Creation function (for two-step construction).
  64     bool Create(wxWindow *parent,
  65                 wxWindowID id,
  66                 const wxString& label, const wxString& url,
  67                 const wxPoint& pos = wxDefaultPosition,
  68                 const wxSize& size = wxDefaultSize,
  69                 long style = wxHL_DEFAULT_STYLE,
  70                 const wxString& name = wxHyperlinkCtrlNameStr);
  71
  72
  73     // get/set
  74     wxColour GetHoverColour() const { return m_hoverColour; }
  75     void SetHoverColour(const wxColour &colour) { m_hoverColour = colour; }
  76
  77     wxColour GetNormalColour() const { return m_normalColour; }
  78     void SetNormalColour(const wxColour &colour);
  79
  80     wxColour GetVisitedColour() const { return m_visitedColour; }
  81     void SetVisitedColour(const wxColour &colour);
  82
  83     wxString GetURL() const { return m_url; }
  84     void SetURL (const wxString &url) { m_url=url; }
  85
  86     void SetVisited(bool visited = true) { m_visited=visited; }
  87     bool GetVisited() const { return m_visited; }
  88
  89     // NOTE: also wxWindow::Set/GetLabel, wxWindow::Set/GetBackgroundColour,
  90     //       wxWindow::Get/SetFont, wxWindow::Get/SetCursor are important !
  91
  92
  93 protected:
  94     // event handlers
  95
  96     // Renders the hyperlink.
  97     void OnPaint(wxPaintEvent& event);
  98
  99     // If the click originates inside the bounding box of the label,
 100     // a flag is set so that an event will be fired when the left
 101     // button is released.
 102     void OnLeftDown(wxMouseEvent& event);
 103
 104     // If the click both originated and finished inside the bounding box
 105     // of the label, a HyperlinkEvent is fired.
 106     void OnLeftUp(wxMouseEvent& event);
 107     void OnRightUp(wxMouseEvent& event);
 108
 109     // Changes the cursor to a hand, if the mouse is inside the label's
 110     // bounding box.
 111     void OnEnterWindow(wxMouseEvent& event);
 112
 113     // Changes the cursor back to the default, if necessary.
 114     void OnLeaveWindow(wxMouseEvent& event);
 115
 116     // handles "Copy URL" menuitem
 117     void OnPopUpCopy(wxCommandEvent& event);
 118
 119
 120     // overridden base class virtuals
 121
 122     // Returns the best size for the window, which is the size needed
 123     // to display the text label.
 124     virtual void DoGetSize(int *width, int *height) const;
 125     virtual wxSize DoGetBestSize() const;
 126
 127     // creates a context menu with "Copy URL" menuitem
 128     virtual void DoContextMenu(const wxPoint &);
 129
 130 private:
 131     // URL associated with the link. This is transmitted inside
 132     // the HyperlinkEvent fired when the user clicks on the label.
 133     wxString m_url;
 134
 135     // Foreground colours for various link types.
 136     // NOTE: wxWindow::m_backgroundColour is used for background,
 137     //       wxWindow::m_foregroundColour is used to render non-visited links
 138     wxColour m_hoverColour;
 139     wxColour m_normalColour;
 140     wxColour m_visitedColour;
 141
 142     // True if the mouse cursor is inside the label's bounding box.
 143     bool m_rollover;
 144
 145     // True if the link has been clicked before.
 146     bool m_visited;
 147
 148     // True if a click is in progress (left button down) and the click
 149     // originated inside the label's bounding box.
 150     bool m_clicking;
 151
 152 private:
 153     DECLARE_DYNAMIC_CLASS(wxHyperlinkCtrl)
 154     DECLARE_EVENT_TABLE()
 155 };
 156
 157
 158 // ----------------------------------------------------------------------------
 159 // wxHyperlinkEvent
 160 // ----------------------------------------------------------------------------
 161
 162 // Declare an event identifier.
 163 BEGIN_DECLARE_EVENT_TYPES()
 164     DECLARE_EXPORTED_EVENT_TYPE(WXDLLIMPEXP_CORE, wxEVT_COMMAND_HYPERLINK, 3700)
 165 END_DECLARE_EVENT_TYPES()
 166
 167 //
 168 // An event fired when the user clicks on the label in a hyperlink control.
 169 // See HyperlinkControl for details.
 170 //
 171 class WXDLLIMPEXP_CORE wxHyperlinkEvent : public wxCommandEvent
 172 {
 173 public:
 174
 175     wxHyperlinkEvent() {}
 176     wxHyperlinkEvent(wxObject *generator, wxWindowID id, const wxString& url)
 177      : wxCommandEvent(wxEVT_COMMAND_HYPERLINK, id), m_url(url)
 178         { SetEventObject(generator); }
 179
 180     // Returns the URL associated with the hyperlink control
 181     // that the user clicked on.
 182     wxString GetURL() const { return m_url; }
 183     void SetURL(const wxString &url) { m_url=url; }
 184
 185 private:
 186
 187     // URL associated with the hyperlink control that the used clicked on.
 188     wxString m_url;
 189 };
 190
 191 // Define a typedef for event handler functions.
 192 typedef void (wxEvtHandler::*wxHyperlinkEventFunction)(wxHyperlinkEvent&);
 193
 194 // Define an event table macro.
 195 #define EVT_HYPERLINK(id, fn) DECLARE_EVENT_TABLE_ENTRY(wxEVT_COMMAND_HYPERLINK, \
 196     id, id, (wxObjectEventFunction) (wxEventFunction) \
 197     wxStaticCastEvent(wxHyperlinkEventFunction, &fn), (wxObject *) NULL),
 198
 199 // Newer event macro
 200 #define wxHyperlinkEventHandler(func) \
 201     (wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent(wxHyperlinkEventFunction, &func)
 202
 203 #endif // wxUSE_HYPERLINKCTRL
 204
 205 #endif // _WX_HYPERLINK_H__