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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 "BKE_screen.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_icons.h"
/* -------------------------------------------------------------------- */
/** \name Generic Tool System Region Callbacks
* \{ */
/**
* Callback for #ARegionType.message_subscribe
*/
void ED_region_generic_tools_region_message_subscribe(const wmRegionMessageSubscribeParams *params)
{
struct wmMsgBus *mbus = params->message_bus;
ARegion *region = params->region;
wmMsgSubscribeValue msg_sub_value_region_tag_redraw = {
.owner = region,
.user_data = region,
.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 *region, int size, int axis)
{
if (axis == 0) {
/* Using Y axis avoids slight feedback loop when adjusting X. */
const float aspect = BLI_rctf_size_y(®ion->v2d.cur) /
(BLI_rcti_size_y(®ion->v2d.mask) + 1);
const float icon_size = ICON_DEFAULT_HEIGHT_TOOLBAR / aspect;
const float column = 1.25f * icon_size;
const float margin = 0.5f * icon_size;
const float snap_units[] = {
column + margin,
(2.0f * column) + margin,
(2.7f * column) + margin,
};
int best_diff = INT_MAX;
int best_size = size;
/* Only snap if less than last snap unit. */
if (size <= snap_units[ARRAY_SIZE(snap_units) - 1]) {
for (uint i = 0; i < ARRAY_SIZE(snap_units); i += 1) {
const int test_size = snap_units[i];
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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