src/generic/infobar.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/infobar.cpp
   3 // Purpose:     generic wxInfoBar implementation
   4 // Author:      Vadim Zeitlin
   5 // Created:     2009-07-28
   6 // RCS-ID:      $Id: wxhead.cpp,v 1.10 2009-06-29 10:23:04 zeitlin Exp $
   7 // Copyright:   (c) 2009 Vadim Zeitlin <vadim@wxwidgets.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 // for compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #if wxUSE_INFOBAR
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/artprov.h"
  30     #include "wx/bmpbuttn.h"
  31     #include "wx/button.h"
  32     #include "wx/settings.h"
  33     #include "wx/statbmp.h"
  34     #include "wx/stattext.h"
  35 #endif // WX_PRECOMP
  36
  37 #include "wx/infobar.h"
  38
  39 #include "wx/scopeguard.h"
  40 #include "wx/sizer.h"
  41
  42 // ============================================================================
  43 // implementation
  44 // ============================================================================
  45
  46 void wxInfoBar::Init()
  47 {
  48     m_icon = NULL;
  49     m_text = NULL;
  50     m_button = NULL;
  51
  52     m_showEffect = wxSHOW_EFFECT_SLIDE_TO_BOTTOM;
  53     m_hideEffect = wxSHOW_EFFECT_SLIDE_TO_TOP;
  54
  55     // use default effect duration
  56     m_effectDuration = 0;
  57 }
  58
  59 bool wxInfoBar::Create(wxWindow *parent, wxWindowID winid)
  60 {
  61     // calling Hide() before Create() ensures that we're created initially
  62     // hidden
  63     Hide();
  64     if ( !wxWindow::Create(parent, winid) )
  65         return false;
  66
  67     // use special, easy to notice, colours
  68     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_INFOBK));
  69     SetOwnForegroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_INFOTEXT));
  70
  71     // create the controls: icon, text and the button to dismiss the
  72     // message.
  73
  74     // the icon is not shown unless it's assigned a valid bitmap
  75     m_icon = new wxStaticBitmap(this, wxID_ANY, wxNullBitmap);
  76
  77     // by default, the text uses a larger, more noticeable, font
  78     m_text = new wxStaticText(this, wxID_ANY, "");
  79     m_text->SetFont(m_text->GetFont().Bold().Larger());
  80
  81     m_button = new wxBitmapButton
  82                    (
  83                     this,
  84                     wxID_ANY,
  85                     wxArtProvider::GetBitmap(wxART_CROSS_MARK),
  86                     wxDefaultPosition,
  87                     wxDefaultSize,
  88                     wxBORDER_NONE
  89                    );
  90     m_button->SetToolTip(_("Hide this notification message."));
  91
  92     Connect
  93     (
  94         wxEVT_COMMAND_BUTTON_CLICKED,
  95         wxCommandEventHandler(wxInfoBar::OnButton),
  96         NULL,
  97         this
  98     );
  99
 100     // center the text inside the sizer with an icon to the left of it and a
 101     // button at the very right
 102     //
 103     // NB: AddButton() relies on the button being the last control in the sizer
 104     //     and being preceded by a spacer
 105     wxSizer * const sizer = new wxBoxSizer(wxHORIZONTAL);
 106     sizer->AddStretchSpacer();
 107     sizer->Add(m_icon, wxSizerFlags().Centre().DoubleBorder());
 108     sizer->Add(m_text, wxSizerFlags().Centre().DoubleBorder());
 109     sizer->AddStretchSpacer();
 110     sizer->Add(m_button, wxSizerFlags().Centre().DoubleBorder());
 111     SetSizer(sizer);
 112
 113     return true;
 114 }
 115
 116 bool wxInfoBar::SetFont(const wxFont& font)
 117 {
 118     if ( !wxInfoBarBase::SetFont(font) )
 119         return false;
 120
 121     // check that we're not called before Create()
 122     if ( m_text )
 123         m_text->SetFont(font);
 124
 125     return true;
 126 }
 127
 128 void wxInfoBar::UpdateParent()
 129 {
 130     wxWindow * const parent = wxGetTopLevelParent(GetParent());
 131     parent->Layout();
 132 }
 133
 134 void wxInfoBar::ChangeParentBackground()
 135 {
 136     wxWindow * const parent = GetParent();
 137     m_origParentBgCol = parent->GetBackgroundColour();
 138
 139     wxSizer * const sizer = GetContainingSizer();
 140     if ( !sizer )
 141         return;
 142
 143     wxWindow *sibling = NULL;
 144     for ( wxSizerItemList::compatibility_iterator
 145             node = sizer->GetChildren().GetFirst();
 146             node;
 147             node = node->GetNext() )
 148     {
 149         if ( node->GetData()->GetWindow() == this )
 150         {
 151             // find the next window following us
 152             for ( node = node->GetNext();
 153                   node;
 154                   node = node->GetNext() )
 155             {
 156                 wxSizerItem * const item = node->GetData();
 157                 if ( item->IsWindow() )
 158                 {
 159                     sibling = item->GetWindow();
 160                     break;
 161                 }
 162             }
 163
 164             break;
 165         }
 166     }
 167
 168     if ( sibling )
 169         parent->SetOwnBackgroundColour(sibling->GetBackgroundColour());
 170 }
 171
 172 void wxInfoBar::RestoreParentBackground()
 173 {
 174     GetParent()->SetOwnBackgroundColour(m_origParentBgCol);
 175 }
 176
 177 void wxInfoBar::DoHide()
 178 {
 179     ChangeParentBackground();
 180     wxON_BLOCK_EXIT_THIS0( wxInfoBar::RestoreParentBackground );
 181
 182     HideWithEffect(m_hideEffect, m_effectDuration);
 183     UpdateParent();
 184 }
 185
 186 void wxInfoBar::DoShow()
 187 {
 188     // re-layout the parent first so that the window expands into an already
 189     // unoccupied by the other controls area: for this we need to change our
 190     // internal visibility flag to force Layout() to take us into account (an
 191     // alternative solution to this hack would be to temporarily set
 192     // wxRESERVE_SPACE_EVEN_IF_HIDDEN flag but it's not really batter)
 193
 194     // just change the internal flag indicating that the window is visible,
 195     // without really showing it
 196     wxWindowBase::Show();
 197
 198     // an extra hack: we want the temporarily uncovered area in which we're
 199     // going to expand to look like part of this sibling for a better effect so
 200     // temporarily change the background of our parent to the same colour
 201     ChangeParentBackground();
 202     wxON_BLOCK_EXIT_THIS0( wxInfoBar::RestoreParentBackground );
 203
 204     // adjust the parent layout to account for us
 205     UpdateParent();
 206
 207     // reset the flag back before really showing the window or it wouldn't be
 208     // shown at all because it would believe itself already visible
 209     wxWindowBase::Show(false);
 210
 211
 212     // finally do really show the window.
 213     ShowWithEffect(m_showEffect, m_effectDuration);
 214 }
 215
 216 void wxInfoBar::ShowMessage(const wxString& msg, int flags)
 217 {
 218     // first update the controls
 219     const int icon = flags & wxICON_MASK;
 220     if ( !icon || (icon == wxICON_NONE) )
 221     {
 222         m_icon->Hide();
 223     }
 224     else // do show an icon
 225     {
 226         m_icon->SetBitmap(wxArtProvider::GetMessageBoxIcon(icon));
 227         m_icon->Show();
 228     }
 229
 230     // notice the use of EscapeMnemonics() to ensure that "&" come through
 231     // correctly
 232     m_text->SetLabel(wxControl::EscapeMnemonics(msg));
 233
 234
 235     // then show this entire window if not done yet
 236     if ( !IsShown() )
 237     {
 238         DoShow();
 239     }
 240     else // we're already shown
 241     {
 242         // just update the layout to correspond to the new message
 243         Layout();
 244     }
 245 }
 246
 247 void wxInfoBar::AddButton(wxWindowID btnid, const wxString& label)
 248 {
 249     wxSizer * const sizer = GetSizer();
 250     wxCHECK_RET( sizer, "must be created first" );
 251
 252     sizer->Insert(sizer->GetItemCount() - 2,
 253                   new wxButton(this, btnid, label),
 254                   wxSizerFlags().Centre().DoubleBorder());
 255 }
 256
 257 void wxInfoBar::OnButton(wxCommandEvent& WXUNUSED(event))
 258 {
 259     DoHide();
 260 }
 261
 262 #endif // wxUSE_INFOBAR