Julian Eisel
4ee2d9df42
Adds an easy way to add drop support for tree-view rows. Most of the work is handled by the tree-view UI code. The tree items can simply override a few functions (`can_drop()`, `on_drop()`, `drop_tooltip()`) to implement their custom drop behavior. While dragging over a tree-view item that can be dropped into/onto, the item can show a custom and dynamic tooltip explaining what's gonna happen on drop. This isn't used yet, but will soon be for asset catalogs. See documentation here: https://wiki.blender.org/wiki/Source/Interface/Views#Further_Customizations
67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/** \file
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* \ingroup edinterface
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*/
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#include "BKE_context.h"
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#include "DNA_space_types.h"
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#include "WM_api.h"
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#include "UI_interface.h"
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static bool ui_tree_view_drop_poll(bContext *C, wmDrag *drag, const wmEvent *event)
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{
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const ARegion *region = CTX_wm_region(C);
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const uiTreeViewItemHandle *hovered_tree_item = UI_block_tree_view_find_item_at(
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region, event->x, event->y);
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if (!hovered_tree_item) {
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return false;
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}
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return UI_tree_view_item_can_drop(hovered_tree_item, drag);
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}
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static char *ui_tree_view_drop_tooltip(bContext *C,
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wmDrag *drag,
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const wmEvent *event,
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wmDropBox *UNUSED(drop))
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{
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const ARegion *region = CTX_wm_region(C);
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const uiTreeViewItemHandle *hovered_tree_item = UI_block_tree_view_find_item_at(
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region, event->x, event->y);
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if (!hovered_tree_item) {
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return nullptr;
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}
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return UI_tree_view_item_drop_tooltip(hovered_tree_item, C, drag, event);
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}
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void ED_dropboxes_ui()
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{
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ListBase *lb = WM_dropboxmap_find("User Interface", SPACE_EMPTY, 0);
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WM_dropbox_add(lb,
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"UI_OT_tree_view_drop",
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ui_tree_view_drop_poll,
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nullptr,
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nullptr,
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ui_tree_view_drop_tooltip);
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}
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