1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup edinterface
*
* This part of the UI-View API is mostly needed to support persistent state of items within the
* view. Views are stored in #uiBlock's, and kept alive with it until after the next redraw. So we
* can compare the old view items with the new view items and keep state persistent for matching
* ones.
*/
#include <memory>
#include <type_traits>
#include <variant>
#include "DNA_screen_types.h"
#include "BKE_screen.h"
#include "BLI_listbase.h"
#include "ED_screen.h"
#include "interface_intern.h"
#include "UI_interface.hh"
#include "UI_abstract_view.hh"
#include "UI_grid_view.hh"
#include "UI_tree_view.hh"
using namespace blender;
using namespace blender::ui;
/**
* Wrapper to store views in a #ListBase. There's no `uiView` base class, we just store views as a
* #std::variant.
*/
struct ViewLink : public Link {
std::string idname;
std::unique_ptr<AbstractView> view;
};
template<class T>
static T *ui_block_add_view_impl(uiBlock &block,
StringRef idname,
std::unique_ptr<AbstractView> view)
{
ViewLink *view_link = MEM_new<ViewLink>(__func__);
BLI_addtail(&block.views, view_link);
view_link->view = std::move(view);
view_link->idname = idname;
return dynamic_cast<T *>(view_link->view.get());
}
AbstractGridView *UI_block_add_view(uiBlock &block,
StringRef idname,
std::unique_ptr<AbstractGridView> grid_view)
{
return ui_block_add_view_impl<AbstractGridView>(block, idname, std::move(grid_view));
}
AbstractTreeView *UI_block_add_view(uiBlock &block,
StringRef idname,
std::unique_ptr<AbstractTreeView> tree_view)
{
return ui_block_add_view_impl<AbstractTreeView>(block, idname, std::move(tree_view));
}
void ui_block_free_views(uiBlock *block)
{
LISTBASE_FOREACH_MUTABLE (ViewLink *, link, &block->views) {
MEM_delete(link);
}
}
void UI_block_views_listen(const uiBlock *block, const wmRegionListenerParams *listener_params)
{
ARegion *region = listener_params->region;
LISTBASE_FOREACH (ViewLink *, view_link, &block->views) {
if (view_link->view->listen(*listener_params->notifier)) {
ED_region_tag_redraw(region);
}
}
}
uiTreeViewItemHandle *UI_block_tree_view_find_item_at(const ARegion *region, const int xy[2])
{
uiButTreeRow *tree_row_but = (uiButTreeRow *)ui_tree_row_find_mouse_over(region, xy);
if (!tree_row_but) {
return nullptr;
}
return tree_row_but->tree_item;
}
uiTreeViewItemHandle *UI_block_tree_view_find_active_item(const ARegion *region)
{
uiButTreeRow *tree_row_but = (uiButTreeRow *)ui_tree_row_find_active(region);
if (!tree_row_but) {
return nullptr;
}
return tree_row_but->tree_item;
}
static StringRef ui_block_view_find_idname(const uiBlock &block, const AbstractView &view)
{
/* First get the idname the of the view we're looking for. */
LISTBASE_FOREACH (ViewLink *, view_link, &block.views) {
if (view_link->view.get() == &view) {
return view_link->idname;
}
}
return {};
}
template<class T>
static T *ui_block_view_find_matching_in_old_block_impl(const uiBlock &new_block,
const T &new_view)
{
uiBlock *old_block = new_block.oldblock;
if (!old_block) {
return nullptr;
}
StringRef idname = ui_block_view_find_idname(new_block, new_view);
if (idname.is_empty()) {
return nullptr;
}
LISTBASE_FOREACH (ViewLink *, old_view_link, &old_block->views) {
if (old_view_link->idname == idname) {
return dynamic_cast<T *>(old_view_link->view.get());
}
}
return nullptr;
}
uiViewHandle *ui_block_view_find_matching_in_old_block(const uiBlock *new_block,
const uiViewHandle *new_view_handle)
{
BLI_assert(new_block && new_view_handle);
const AbstractView &new_view = reinterpret_cast<const AbstractView &>(*new_view_handle);
AbstractView *old_view = ui_block_view_find_matching_in_old_block_impl(*new_block, new_view);
return reinterpret_cast<uiViewHandle *>(old_view);
}
uiButTreeRow *ui_block_view_find_treerow_in_old_block(const uiBlock *new_block,
const uiTreeViewItemHandle *new_item_handle)
{
uiBlock *old_block = new_block->oldblock;
if (!old_block) {
return nullptr;
}
const AbstractTreeViewItem &new_item = *reinterpret_cast<const AbstractTreeViewItem *>(
new_item_handle);
const AbstractView *old_view = ui_block_view_find_matching_in_old_block_impl(
*new_block, new_item.get_tree_view());
if (!old_view) {
return nullptr;
}
LISTBASE_FOREACH (uiBut *, old_but, &old_block->buttons) {
if (old_but->type != UI_BTYPE_TREEROW) {
continue;
}
uiButTreeRow *old_treerow_but = (uiButTreeRow *)old_but;
if (!old_treerow_but->tree_item) {
continue;
}
AbstractTreeViewItem &old_item = *reinterpret_cast<AbstractTreeViewItem *>(
old_treerow_but->tree_item);
/* Check if the row is from the expected tree-view. */
if (&old_item.get_tree_view() != old_view) {
continue;
}
if (UI_tree_view_item_matches(new_item_handle, old_treerow_but->tree_item)) {
return old_treerow_but;
}
}
return nullptr;
}
|