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add support for GDK_SCROLL_SMOOTH mouse wheel event, introduced in GTK+ 3.4

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74806 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Paul Cornett
2013-09-14 18:15:42 +00:00
parent 53f1a5b1bd
commit 8a1554ed3c
1 changed files with 74 additions and 9 deletions
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83
src/gtk/window.cpp
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@@ -1618,14 +1618,14 @@ gtk_window_motion_notify_callback( GtkWidget * WXUNUSED(widget),
// _gtk_range_get_wheel_delta()
static inline int GetWheelScrollActionDelta(GtkRange* range)
{
int d = 3;
int delta = 3;
if (range)
{
GtkAdjustment* adj = gtk_range_get_adjustment(range);
const double page_size = gtk_adjustment_get_page_size(adj);
d = wxRound(pow(page_size, 2.0 / 3.0));
delta = wxRound(pow(page_size, 2.0 / 3.0));
}
return d;
return delta;
}
static gboolean
@@ -1636,6 +1636,32 @@ window_scroll_event(GtkWidget*, GdkEventScroll* gdk_event, wxWindow* win)
event.m_wheelDelta = 120;
#if GTK_CHECK_VERSION(3,4,0)
if (gdk_event->direction == GDK_SCROLL_SMOOTH)
{
bool processed_x = false;
if (gdk_event->delta_x)
{
event.m_wheelAxis = wxMOUSE_WHEEL_HORIZONTAL;
event.m_wheelRotation = int(event.m_wheelDelta * gdk_event->delta_x);
GtkRange* range = win->m_scrollBar[wxWindow::ScrollDir_Horz];
event.m_linesPerAction = GetWheelScrollActionDelta(range);
event.m_columnsPerAction = event.m_linesPerAction;
processed_x = win->GTKProcessEvent(event);
}
bool processed_y = false;
if (gdk_event->delta_y)
{
event.m_wheelAxis = wxMOUSE_WHEEL_VERTICAL;
event.m_wheelRotation = int(event.m_wheelDelta * gdk_event->delta_y);
GtkRange* range = win->m_scrollBar[wxWindow::ScrollDir_Vert];
event.m_linesPerAction = GetWheelScrollActionDelta(range);
event.m_columnsPerAction = event.m_linesPerAction;
processed_y = win->GTKProcessEvent(event);
}
return processed_x || processed_y;
}
#endif // GTK_CHECK_VERSION(3,4,0)
GtkRange *range;
switch (gdk_event->direction)
{
@@ -1665,6 +1691,36 @@ window_scroll_event(GtkWidget*, GdkEventScroll* gdk_event, wxWindow* win)
return win->GTKProcessEvent(event);
}
#if GTK_CHECK_VERSION(3,4,0)
static gboolean
hscrollbar_scroll_event(GtkWidget* widget, GdkEventScroll* gdk_event, wxWindow* win)
{
GdkEventScroll event2;
if (gdk_event->direction == GDK_SCROLL_SMOOTH && gdk_event->delta_x == 0)
{
memcpy(&event2, gdk_event, sizeof(event2));
event2.delta_x = event2.delta_y;
event2.delta_y = 0;
gdk_event = &event2;
}
return window_scroll_event(widget, gdk_event, win);
}
static gboolean
vscrollbar_scroll_event(GtkWidget* widget, GdkEventScroll* gdk_event, wxWindow* win)
{
GdkEventScroll event2;
if (gdk_event->direction == GDK_SCROLL_SMOOTH && gdk_event->delta_y == 0)
{
memcpy(&event2, gdk_event, sizeof(event2));
event2.delta_y = event2.delta_x;
event2.delta_x = 0;
gdk_event = &event2;
}
return window_scroll_event(widget, gdk_event, win);
}
#endif // GTK_CHECK_VERSION(3,4,0)
//-----------------------------------------------------------------------------
// "popup-menu"
//-----------------------------------------------------------------------------
@@ -2593,12 +2649,21 @@ void wxWindowGTK::ConnectWidget( GtkWidget *widget )
g_signal_connect (widget, "scroll_event",
G_CALLBACK (window_scroll_event), this);
if (m_scrollBar[ScrollDir_Horz])
g_signal_connect (m_scrollBar[ScrollDir_Horz], "scroll_event",
G_CALLBACK (window_scroll_event), this);
if (m_scrollBar[ScrollDir_Vert])
g_signal_connect (m_scrollBar[ScrollDir_Vert], "scroll_event",
G_CALLBACK (window_scroll_event), this);
for (int i = 0; i < 2; i++)
{
GtkRange* range = m_scrollBar[i];
if (range)
{
#if GTK_CHECK_VERSION(3,4,0)
GCallback cb = GCallback(i == ScrollDir_Horz
? hscrollbar_scroll_event
: vscrollbar_scroll_event);
#else
GCallback cb = GCallback(window_scroll_event);
#endif
g_signal_connect(range, "scroll_event", cb, this);
}
}
g_signal_connect (widget, "popup_menu",
G_CALLBACK (wxgtk_window_popup_menu_callback), this);