80 lines
3.2 KiB
C++
80 lines
3.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/gtk/private/event.h
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// Purpose: Helper functions for working with GDK and wx events
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// Author: Vaclav Slavik
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// Created: 2011-10-14
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// Copyright: (c) 2011 Vaclav Slavik
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _GTK_PRIVATE_EVENT_H_
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#define _GTK_PRIVATE_EVENT_H_
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#if !GTK_CHECK_VERSION(2,10,0)
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// GTK+ can reliably detect Meta key state only since 2.10 when
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// GDK_META_MASK was introduced -- there wasn't any way to detect it
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// in older versions. wxGTK used GDK_MOD2_MASK for this purpose, but
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// GDK_MOD2_MASK is documented as:
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//
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// the fifth modifier key (it depends on the modifier mapping of the X
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// server which key is interpreted as this modifier)
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//
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// In other words, it isn't guaranteed to map to Meta. This is a real
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// problem: it is common to map NumLock to it (in fact, it's an exception
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// if the X server _doesn't_ use it for NumLock). So the old code caused
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// wxKeyEvent::MetaDown() to always return true as long as NumLock was on
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// on many systems, which broke all applications using
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// wxKeyEvent::GetModifiers() to check modifiers state (see e.g. here:
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// http://tinyurl.com/56lsk2).
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//
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// Because of this, it's better to not detect Meta key state at all than
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// to detect it incorrectly. Hence the following #define, which causes
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// m_metaDown to be always set to false.
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#define GDK_META_MASK 0
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#endif
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namespace wxGTKImpl
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{
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// init wxMouseEvent with the info from GdkEventXXX struct
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template<typename T> void InitMouseEvent(wxWindowGTK *win,
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wxMouseEvent& event,
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T *gdk_event)
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{
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event.m_shiftDown = (gdk_event->state & GDK_SHIFT_MASK) != 0;
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event.m_controlDown = (gdk_event->state & GDK_CONTROL_MASK) != 0;
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event.m_altDown = (gdk_event->state & GDK_MOD1_MASK) != 0;
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event.m_metaDown = (gdk_event->state & GDK_META_MASK) != 0;
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event.m_leftDown = (gdk_event->state & GDK_BUTTON1_MASK) != 0;
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event.m_middleDown = (gdk_event->state & GDK_BUTTON2_MASK) != 0;
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event.m_rightDown = (gdk_event->state & GDK_BUTTON3_MASK) != 0;
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// In gdk/win32 VK_XBUTTON1 is translated to GDK_BUTTON4_MASK
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// and VK_XBUTTON2 to GDK_BUTTON5_MASK. In x11/gdk buttons 4/5
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// are wheel rotation and buttons 8/9 don't change the state.
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event.m_aux1Down = (gdk_event->state & GDK_BUTTON4_MASK) != 0;
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event.m_aux2Down = (gdk_event->state & GDK_BUTTON5_MASK) != 0;
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wxPoint pt = win->GetClientAreaOrigin();
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event.m_x = (wxCoord)gdk_event->x - pt.x;
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event.m_y = (wxCoord)gdk_event->y - pt.y;
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if ((win->m_wxwindow) && (win->GetLayoutDirection() == wxLayout_RightToLeft))
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{
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// origin in the upper right corner
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GtkAllocation a;
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gtk_widget_get_allocation(win->m_wxwindow, &a);
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int window_width = a.width;
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event.m_x = window_width - event.m_x;
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}
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event.SetEventObject( win );
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event.SetId( win->GetId() );
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event.SetTimestamp( gdk_event->time );
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}
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} // namespace wxGTKImpl
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#endif // _GTK_PRIVATE_EVENT_H_
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