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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/** \file
* \ingroup edscr
*
* Helper functions for area/region API.
*/
#include "DNA_userdef_types.h"
#include "BLI_blenlib.h"
#include "BLI_utildefines.h"
#include "RNA_access.h"
#include "RNA_types.h"
#include "WM_message.h"
#include "ED_screen.h"
#include "UI_interface.h"
/* -------------------------------------------------------------------- */
/** \name Generic Tool System Region Callbacks
* \{ */
/**
* Callback for #ARegionType.message_subscribe
*/
void ED_region_generic_tools_region_message_subscribe(const struct bContext *UNUSED(C),
struct WorkSpace *UNUSED(workspace),
struct Scene *UNUSED(scene),
struct bScreen *UNUSED(screen),
struct ScrArea *UNUSED(sa),
struct ARegion *ar,
struct wmMsgBus *mbus)
{
wmMsgSubscribeValue msg_sub_value_region_tag_redraw = {
.owner = ar,
.user_data = ar,
.notify = ED_region_do_msg_notify_tag_redraw,
};
WM_msg_subscribe_rna_anon_prop(mbus, WorkSpace, tools, &msg_sub_value_region_tag_redraw);
}
/**
* Callback for #ARegionType.snap_size
*/
int ED_region_generic_tools_region_snap_size(const ARegion *ar, int size, int axis)
{
if (axis == 0) {
/* Note, this depends on the icon size: see #ICON_DEFAULT_HEIGHT_TOOLBAR. */
const float snap_units[] = {2 + 0.8f, 4 + 0.8f};
const float aspect = BLI_rctf_size_x(&ar->v2d.cur) / (BLI_rcti_size_x(&ar->v2d.mask) + 1);
int best_diff = INT_MAX;
int best_size = size;
for (uint i = 0; i < ARRAY_SIZE(snap_units); i += 1) {
const int test_size = (snap_units[i] * U.widget_unit) / (UI_DPI_FAC * aspect);
const int test_diff = ABS(test_size - size);
if (test_diff < best_diff) {
best_size = test_size;
best_diff = test_diff;
}
}
return best_size;
}
return size;
}
/** \} */
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