gdouble
ev_document_misc_get_screen_dpi (GdkScreen *screen, GdkMonitor *monitor)
{
gdouble dp, di;
int mmX, mmY;
GdkRectangle monitorRect;
/*diagonal in pixels*/
gdk_monitor_get_geometry(monitor, &monitorRect);
/*diagonal in inches*/
mmX = gdk_monitor_get_width_mm(monitor);
mmY = gdk_monitor_get_height_mm(monitor);
/* Fallback in cases where devices report their aspect ratio */
if ((mmX == 160 && (mmY == 90 || mmY == 100)) ||
(mmX == 16 && (mmY == 9 || mmY == 10)) ||
mmX == 0 || mmY == 0 ||
monitorRect.width == 0 || monitorRect.height == 0) {
return 96.0;
}
dp = hypot (monitorRect.width, monitorRect.height);
di = hypot (mmX, mmY) / 25.4;
di /= gdk_monitor_get_scale_factor(monitor);
return (dp / di);
}
gboolean
_gdk_win32_display_init_monitors (GdkWin32Display *win32_display)
{
GdkDisplay *display = GDK_DISPLAY (win32_display);
GPtrArray *new_monitors;
gint i;
gboolean changed = FALSE;
GdkWin32Monitor *primary_to_move = NULL;
for (i = 0; i < win32_display->monitors->len; i++)
GDK_WIN32_MONITOR (g_ptr_array_index (win32_display->monitors, i))->remove = TRUE;
new_monitors = _gdk_win32_display_get_monitor_list (win32_display);
for (i = 0; i < new_monitors->len; i++)
{
GdkWin32Monitor *w32_m;
GdkMonitor *m;
GdkWin32Monitor *w32_ex_monitor;
GdkMonitor *ex_monitor;
GdkRectangle geometry, ex_geometry;
GdkRectangle workarea, ex_workarea;
w32_m = GDK_WIN32_MONITOR (g_ptr_array_index (new_monitors, i));
m = GDK_MONITOR (w32_m);
ex_monitor = _gdk_win32_display_find_matching_monitor (win32_display, m);
w32_ex_monitor = GDK_WIN32_MONITOR (ex_monitor);
if (ex_monitor == NULL)
{
w32_m->add = TRUE;
changed = TRUE;
continue;
}
w32_ex_monitor->remove = FALSE;
if (i == 0)
primary_to_move = w32_ex_monitor;
gdk_monitor_get_geometry (m, &geometry);
gdk_monitor_get_geometry (ex_monitor, &ex_geometry);
gdk_monitor_get_workarea (m, &workarea);
gdk_monitor_get_workarea (ex_monitor, &ex_workarea);
if (memcmp (&workarea, &ex_workarea, sizeof (GdkRectangle)) != 0)
{
w32_ex_monitor->work_rect = workarea;
changed = TRUE;
}
if (memcmp (&geometry, &ex_geometry, sizeof (GdkRectangle)) != 0)
{
gdk_monitor_set_size (ex_monitor, geometry.width, geometry.height);
gdk_monitor_set_position (ex_monitor, geometry.x, geometry.y);
changed = TRUE;
}
if (gdk_monitor_get_width_mm (m) != gdk_monitor_get_width_mm (ex_monitor) ||
gdk_monitor_get_height_mm (m) != gdk_monitor_get_height_mm (ex_monitor))
{
gdk_monitor_set_physical_size (ex_monitor,
gdk_monitor_get_width_mm (m),
gdk_monitor_get_height_mm (m));
changed = TRUE;
}
if (g_strcmp0 (gdk_monitor_get_model (m), gdk_monitor_get_model (ex_monitor)) != 0)
{
gdk_monitor_set_model (ex_monitor,
gdk_monitor_get_model (m));
changed = TRUE;
}
if (g_strcmp0 (gdk_monitor_get_manufacturer (m), gdk_monitor_get_manufacturer (ex_monitor)) != 0)
{
gdk_monitor_set_manufacturer (ex_monitor,
gdk_monitor_get_manufacturer (m));
changed = TRUE;
}
if (gdk_monitor_get_refresh_rate (m) != gdk_monitor_get_refresh_rate (ex_monitor))
{
gdk_monitor_set_refresh_rate (ex_monitor, gdk_monitor_get_refresh_rate (m));
changed = TRUE;
}
if (gdk_monitor_get_scale_factor (m) != gdk_monitor_get_scale_factor (ex_monitor))
{
gdk_monitor_set_scale_factor (ex_monitor, gdk_monitor_get_scale_factor (m));
changed = TRUE;
}
if (gdk_monitor_get_subpixel_layout (m) != gdk_monitor_get_subpixel_layout (ex_monitor))
{
gdk_monitor_set_subpixel_layout (ex_monitor, gdk_monitor_get_subpixel_layout (m));
changed = TRUE;
}
}
for (i = win32_display->monitors->len - 1; i >= 0; i--)
{
GdkWin32Monitor *w32_ex_monitor;
GdkMonitor *ex_monitor;
w32_ex_monitor = GDK_WIN32_MONITOR (g_ptr_array_index (win32_display->monitors, i));
ex_monitor = GDK_MONITOR (w32_ex_monitor);
if (!w32_ex_monitor->remove)
continue;
changed = TRUE;
gdk_display_monitor_removed (display, ex_monitor);
g_ptr_array_remove_index (win32_display->monitors, i);
}
for (i = 0; i < new_monitors->len; i++)
{
GdkWin32Monitor *w32_m;
GdkMonitor *m;
w32_m = GDK_WIN32_MONITOR (g_ptr_array_index (new_monitors, i));
m = GDK_MONITOR (w32_m);
if (!w32_m->add)
continue;
gdk_display_monitor_added (display, m);
if (i == 0)
g_ptr_array_insert (win32_display->monitors, 0, g_object_ref (w32_m));
else
g_ptr_array_add (win32_display->monitors, g_object_ref (w32_m));
}
g_ptr_array_free (new_monitors, TRUE);
if (primary_to_move)
{
g_ptr_array_remove (win32_display->monitors, g_object_ref (primary_to_move));
g_ptr_array_insert (win32_display->monitors, 0, primary_to_move);
changed = TRUE;
}
return changed;
}