| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/gtk/scrolbar.cpp |
| 3 | // Purpose: |
| 4 | // Author: Robert Roebling |
| 5 | // Id: $Id$ |
| 6 | // Copyright: (c) 1998 Robert Roebling |
| 7 | // Licence: wxWindows licence |
| 8 | ///////////////////////////////////////////////////////////////////////////// |
| 9 | |
| 10 | // For compilers that support precompilation, includes "wx.h". |
| 11 | #include "wx/wxprec.h" |
| 12 | |
| 13 | #if wxUSE_SCROLLBAR |
| 14 | |
| 15 | #include "wx/scrolbar.h" |
| 16 | |
| 17 | #ifndef WX_PRECOMP |
| 18 | #include "wx/utils.h" |
| 19 | #endif |
| 20 | |
| 21 | #include "wx/gtk/private.h" |
| 22 | |
| 23 | //----------------------------------------------------------------------------- |
| 24 | // "value_changed" from scrollbar |
| 25 | //----------------------------------------------------------------------------- |
| 26 | |
| 27 | extern "C" { |
| 28 | static void |
| 29 | gtk_value_changed(GtkRange* range, wxScrollBar* win) |
| 30 | { |
| 31 | wxEventType eventType = win->GetScrollEventType(range); |
| 32 | if (eventType != wxEVT_NULL) |
| 33 | { |
| 34 | const int orient = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL; |
| 35 | const int value = win->GetThumbPosition(); |
| 36 | const int id = win->GetId(); |
| 37 | |
| 38 | // first send the specific event for the user action |
| 39 | wxScrollEvent evtSpec(eventType, id, value, orient); |
| 40 | evtSpec.SetEventObject(win); |
| 41 | win->HandleWindowEvent(evtSpec); |
| 42 | |
| 43 | if (!win->m_isScrolling) |
| 44 | { |
| 45 | // and if it's over also send a general "changed" event |
| 46 | wxScrollEvent evtChanged(wxEVT_SCROLL_CHANGED, id, value, orient); |
| 47 | evtChanged.SetEventObject(win); |
| 48 | win->HandleWindowEvent(evtChanged); |
| 49 | } |
| 50 | } |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | //----------------------------------------------------------------------------- |
| 55 | // "button_press_event" from scrollbar |
| 56 | //----------------------------------------------------------------------------- |
| 57 | |
| 58 | extern "C" { |
| 59 | static gboolean |
| 60 | gtk_button_press_event(GtkRange*, GdkEventButton*, wxScrollBar* win) |
| 61 | { |
| 62 | win->m_mouseButtonDown = true; |
| 63 | return false; |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | //----------------------------------------------------------------------------- |
| 68 | // "event_after" from scrollbar |
| 69 | //----------------------------------------------------------------------------- |
| 70 | |
| 71 | extern "C" { |
| 72 | static void |
| 73 | gtk_event_after(GtkRange* range, GdkEvent* event, wxScrollBar* win) |
| 74 | { |
| 75 | if (event->type == GDK_BUTTON_RELEASE) |
| 76 | { |
| 77 | g_signal_handlers_block_by_func(range, (void*)gtk_event_after, win); |
| 78 | |
| 79 | const int value = win->GetThumbPosition(); |
| 80 | const int orient = win->HasFlag(wxSB_VERTICAL) ? wxVERTICAL : wxHORIZONTAL; |
| 81 | const int id = win->GetId(); |
| 82 | |
| 83 | wxScrollEvent evtRel(wxEVT_SCROLL_THUMBRELEASE, id, value, orient); |
| 84 | evtRel.SetEventObject(win); |
| 85 | win->HandleWindowEvent(evtRel); |
| 86 | |
| 87 | wxScrollEvent evtChanged(wxEVT_SCROLL_CHANGED, id, value, orient); |
| 88 | evtChanged.SetEventObject(win); |
| 89 | win->HandleWindowEvent(evtChanged); |
| 90 | } |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | //----------------------------------------------------------------------------- |
| 95 | // "button_release_event" from scrollbar |
| 96 | //----------------------------------------------------------------------------- |
| 97 | |
| 98 | extern "C" { |
| 99 | static gboolean |
| 100 | gtk_button_release_event(GtkRange* range, GdkEventButton*, wxScrollBar* win) |
| 101 | { |
| 102 | win->m_mouseButtonDown = false; |
| 103 | // If thumb tracking |
| 104 | if (win->m_isScrolling) |
| 105 | { |
| 106 | win->m_isScrolling = false; |
| 107 | // Hook up handler to send thumb release event after this emission is finished. |
| 108 | // To allow setting scroll position from event handler, sending event must |
| 109 | // be deferred until after the GtkRange handler for this signal has run |
| 110 | g_signal_handlers_unblock_by_func(range, (void*)gtk_event_after, win); |
| 111 | } |
| 112 | |
| 113 | return false; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | //----------------------------------------------------------------------------- |
| 118 | // wxScrollBar |
| 119 | //----------------------------------------------------------------------------- |
| 120 | |
| 121 | IMPLEMENT_DYNAMIC_CLASS(wxScrollBar,wxControl) |
| 122 | |
| 123 | wxScrollBar::wxScrollBar() |
| 124 | { |
| 125 | } |
| 126 | |
| 127 | wxScrollBar::~wxScrollBar() |
| 128 | { |
| 129 | } |
| 130 | |
| 131 | bool wxScrollBar::Create(wxWindow *parent, wxWindowID id, |
| 132 | const wxPoint& pos, const wxSize& size, |
| 133 | long style, const wxValidator& validator, const wxString& name ) |
| 134 | { |
| 135 | if (!PreCreation( parent, pos, size ) || |
| 136 | !CreateBase( parent, id, pos, size, style, validator, name )) |
| 137 | { |
| 138 | wxFAIL_MSG( wxT("wxScrollBar creation failed") ); |
| 139 | return false; |
| 140 | } |
| 141 | |
| 142 | const bool isVertical = (style & wxSB_VERTICAL) != 0; |
| 143 | if (isVertical) |
| 144 | m_widget = gtk_vscrollbar_new( (GtkAdjustment *) NULL ); |
| 145 | else |
| 146 | m_widget = gtk_hscrollbar_new( (GtkAdjustment *) NULL ); |
| 147 | |
| 148 | m_scrollBar[0] = (GtkRange*)m_widget; |
| 149 | |
| 150 | g_signal_connect_after(m_widget, "value_changed", |
| 151 | G_CALLBACK(gtk_value_changed), this); |
| 152 | g_signal_connect(m_widget, "button_press_event", |
| 153 | G_CALLBACK(gtk_button_press_event), this); |
| 154 | g_signal_connect(m_widget, "button_release_event", |
| 155 | G_CALLBACK(gtk_button_release_event), this); |
| 156 | |
| 157 | gulong handler_id; |
| 158 | handler_id = g_signal_connect( |
| 159 | m_widget, "event_after", G_CALLBACK(gtk_event_after), this); |
| 160 | g_signal_handler_block(m_widget, handler_id); |
| 161 | |
| 162 | m_parent->DoAddChild( this ); |
| 163 | |
| 164 | PostCreation(size); |
| 165 | |
| 166 | return true; |
| 167 | } |
| 168 | |
| 169 | int wxScrollBar::GetThumbPosition() const |
| 170 | { |
| 171 | GtkAdjustment* adj = ((GtkRange*)m_widget)->adjustment; |
| 172 | return int(adj->value + 0.5); |
| 173 | } |
| 174 | |
| 175 | int wxScrollBar::GetThumbSize() const |
| 176 | { |
| 177 | GtkAdjustment* adj = ((GtkRange*)m_widget)->adjustment; |
| 178 | return int(adj->page_size); |
| 179 | } |
| 180 | |
| 181 | int wxScrollBar::GetPageSize() const |
| 182 | { |
| 183 | GtkAdjustment* adj = ((GtkRange*)m_widget)->adjustment; |
| 184 | return int(adj->page_increment); |
| 185 | } |
| 186 | |
| 187 | int wxScrollBar::GetRange() const |
| 188 | { |
| 189 | GtkAdjustment* adj = ((GtkRange*)m_widget)->adjustment; |
| 190 | return int(adj->upper); |
| 191 | } |
| 192 | |
| 193 | void wxScrollBar::SetThumbPosition( int viewStart ) |
| 194 | { |
| 195 | if (GetThumbPosition() != viewStart) |
| 196 | { |
| 197 | g_signal_handlers_block_by_func(m_widget, |
| 198 | (gpointer)gtk_value_changed, this); |
| 199 | |
| 200 | gtk_range_set_value((GtkRange*)m_widget, viewStart); |
| 201 | m_scrollPos[0] = gtk_range_get_value((GtkRange*)m_widget); |
| 202 | |
| 203 | g_signal_handlers_unblock_by_func(m_widget, |
| 204 | (gpointer)gtk_value_changed, this); |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | void wxScrollBar::SetScrollbar(int position, int thumbSize, int range, int pageSize, bool) |
| 209 | { |
| 210 | if (range == 0) |
| 211 | { |
| 212 | // GtkRange requires upper > lower |
| 213 | range = |
| 214 | thumbSize = 1; |
| 215 | } |
| 216 | GtkAdjustment* adj = ((GtkRange*)m_widget)->adjustment; |
| 217 | adj->step_increment = 1; |
| 218 | adj->page_increment = pageSize; |
| 219 | adj->page_size = thumbSize; |
| 220 | adj->value = position; |
| 221 | g_signal_handlers_block_by_func(m_widget, (void*)gtk_value_changed, this); |
| 222 | gtk_range_set_range((GtkRange*)m_widget, 0, range); |
| 223 | m_scrollPos[0] = adj->value; |
| 224 | g_signal_handlers_unblock_by_func(m_widget, (void*)gtk_value_changed, this); |
| 225 | } |
| 226 | |
| 227 | void wxScrollBar::SetPageSize( int pageLength ) |
| 228 | { |
| 229 | SetScrollbar(GetThumbPosition(), GetThumbSize(), GetRange(), pageLength); |
| 230 | } |
| 231 | |
| 232 | void wxScrollBar::SetRange(int range) |
| 233 | { |
| 234 | SetScrollbar(GetThumbPosition(), GetThumbSize(), range, GetPageSize()); |
| 235 | } |
| 236 | |
| 237 | GdkWindow *wxScrollBar::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const |
| 238 | { |
| 239 | return m_widget->window; |
| 240 | } |
| 241 | |
| 242 | // static |
| 243 | wxVisualAttributes |
| 244 | wxScrollBar::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant)) |
| 245 | { |
| 246 | return GetDefaultAttributesFromGTKWidget(gtk_vscrollbar_new); |
| 247 | } |
| 248 | |
| 249 | #endif // wxUSE_SCROLLBAR |