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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
#include <LibDraw/Palette.h>
#include <LibDraw/StylePainter.h>
#include <LibGUI/GBoxLayout.h>
#include <LibGUI/GPainter.h>
#include <LibGUI/GTabWidget.h>
GTabWidget::GTabWidget(GWidget* parent)
: GWidget(parent)
{
}
GTabWidget::~GTabWidget()
{
}
void GTabWidget::add_widget(const StringView& title, GWidget* widget)
{
m_tabs.append({ title, widget });
add_child(*widget);
}
void GTabWidget::set_active_widget(GWidget* widget)
{
if (widget == m_active_widget)
return;
if (m_active_widget)
m_active_widget->set_visible(false);
m_active_widget = widget;
if (m_active_widget) {
m_active_widget->set_relative_rect(child_rect_for_size(size()));
m_active_widget->set_visible(true);
}
update_bar();
}
void GTabWidget::resize_event(GResizeEvent& event)
{
if (!m_active_widget)
return;
m_active_widget->set_relative_rect(child_rect_for_size(event.size()));
}
Rect GTabWidget::child_rect_for_size(const Size& size) const
{
Rect rect;
switch (m_tab_position) {
case TabPosition::Top:
rect = { { container_padding(), bar_height() + container_padding() }, { size.width() - container_padding() * 2, size.height() - bar_height() - container_padding() * 2 } };
break;
case TabPosition::Bottom:
rect = { { container_padding(), container_padding() }, { size.width() - container_padding() * 2, size.height() - bar_height() - container_padding() * 2 } };
break;
}
if (rect.is_empty())
return {};
return rect;
}
void GTabWidget::child_event(CChildEvent& event)
{
if (!event.child() || !is<GWidget>(*event.child()))
return GWidget::child_event(event);
auto& child = to<GWidget>(*event.child());
if (event.type() == GEvent::ChildAdded) {
if (!m_active_widget)
set_active_widget(&child);
else if (m_active_widget != &child)
child.set_visible(false);
} else if (event.type() == GEvent::ChildRemoved) {
if (m_active_widget == &child) {
GWidget* new_active_widget = nullptr;
for_each_child_widget([&](auto& new_child) {
new_active_widget = &new_child;
return IterationDecision::Break;
});
set_active_widget(new_active_widget);
}
}
GWidget::child_event(event);
}
Rect GTabWidget::bar_rect() const
{
switch (m_tab_position) {
case TabPosition::Top:
return { 0, 0, width(), bar_height() };
case TabPosition::Bottom:
return { 0, height() - bar_height(), width(), bar_height() };
}
ASSERT_NOT_REACHED();
}
Rect GTabWidget::container_rect() const
{
switch (m_tab_position) {
case TabPosition::Top:
return { 0, bar_height(), width(), height() - bar_height() };
case TabPosition::Bottom:
return { 0, 0, width(), height() - bar_height() };
}
ASSERT_NOT_REACHED();
}
void GTabWidget::paint_event(GPaintEvent& event)
{
GPainter painter(*this);
painter.add_clip_rect(event.rect());
auto container_rect = this->container_rect();
auto padding_rect = container_rect;
for (int i = 0; i < container_padding(); ++i) {
painter.draw_rect(padding_rect, palette().button());
padding_rect.shrink(2, 2);
}
StylePainter::paint_frame(painter, container_rect, palette(), FrameShape::Container, FrameShadow::Raised, 2);
for (int i = 0; i < m_tabs.size(); ++i) {
if (m_tabs[i].widget == m_active_widget)
continue;
bool hovered = i == m_hovered_tab_index;
auto button_rect = this->button_rect(i);
StylePainter::paint_tab_button(painter, button_rect, palette(), false, hovered, m_tabs[i].widget->is_enabled());
painter.draw_text(button_rect.translated(0, 1), m_tabs[i].title, TextAlignment::Center, palette().button_text());
}
for (int i = 0; i < m_tabs.size(); ++i) {
if (m_tabs[i].widget != m_active_widget)
continue;
bool hovered = i == m_hovered_tab_index;
auto button_rect = this->button_rect(i);
StylePainter::paint_tab_button(painter, button_rect, palette(), true, hovered, m_tabs[i].widget->is_enabled());
painter.draw_text(button_rect.translated(0, 1), m_tabs[i].title, TextAlignment::Center, palette().button_text());
painter.draw_line(button_rect.bottom_left().translated(1, 1), button_rect.bottom_right().translated(-1, 1), palette().button());
break;
}
}
Rect GTabWidget::button_rect(int index) const
{
int x_offset = 2;
for (int i = 0; i < index; ++i)
x_offset += m_tabs[i].width(font());
Rect rect { x_offset, 0, m_tabs[index].width(font()), bar_height() };
if (m_tabs[index].widget != m_active_widget) {
rect.move_by(0, 2);
rect.set_height(rect.height() - 2);
} else {
rect.move_by(-2, 0);
rect.set_width(rect.width() + 4);
}
rect.move_by(bar_rect().location());
return rect;
}
int GTabWidget::TabData::width(const Font& font) const
{
return 16 + font.width(title);
}
void GTabWidget::mousedown_event(GMouseEvent& event)
{
for (int i = 0; i < m_tabs.size(); ++i) {
auto button_rect = this->button_rect(i);
if (!button_rect.contains(event.position()))
continue;
set_active_widget(m_tabs[i].widget);
return;
}
}
void GTabWidget::mousemove_event(GMouseEvent& event)
{
int hovered_tab = -1;
for (int i = 0; i < m_tabs.size(); ++i) {
auto button_rect = this->button_rect(i);
if (!button_rect.contains(event.position()))
continue;
hovered_tab = i;
if (m_tabs[i].widget == m_active_widget)
break;
}
if (hovered_tab == m_hovered_tab_index)
return;
m_hovered_tab_index = hovered_tab;
update_bar();
}
void GTabWidget::leave_event(CEvent&)
{
if (m_hovered_tab_index != -1) {
m_hovered_tab_index = -1;
update_bar();
}
}
void GTabWidget::update_bar()
{
auto invalidation_rect = bar_rect();
invalidation_rect.set_height(invalidation_rect.height() + 1);
update(invalidation_rect);
}
void GTabWidget::set_tab_position(TabPosition tab_position)
{
if (m_tab_position == tab_position)
return;
m_tab_position = tab_position;
if (m_active_widget)
m_active_widget->set_relative_rect(child_rect_for_size(size()));
update();
}
int GTabWidget::active_tab_index() const
{
for (int i = 0; i < m_tabs.size(); i++) {
if (m_tabs.at(i).widget == m_active_widget)
return i;
}
return -1;
}
|
