╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ Header.zig ───────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
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266 .text_box => |*x| x, 267 .auth_tab => |*at| blk: { 268 // the label tracks login state per frame, so the width must too 269 child.min_size = .{ .width = at.minWidth(), .height = null }; 270 break :blk &at.text_box; 271 }, 272 else => null, 273 }; 274 if (tb) |t| ui.widget.markSelected(t, selected_tab == id); 275 tabs_width += if (child.min_size) |min_size| min_size.width orelse 0 else 0; 276 } 277 278 // the outer box's hidden border occupies two columns. keep the title 279 // and tabs together if they fit; otherwise tab strip on its own row. 280 const viewport_width = constraint.max_size.width orelse constraint.min_size.width; 281 const content_width = if (viewport_width) |width| width -| 2 else null; 282 const back_width: usize = if (back_visible) ui.widget.back_button_width else 0; 283 const wrap = if (content_width) |width| self.first_group_width + back_width + tabs_width > width else false; 284 box.options.direction = if (wrap) .vert else .horiz; 285 tabs_child.min_size = if (wrap) .{ .width = content_width, .height = null } else null; 286 (box.children.getPtr(self.gap_id) orelse unreachable).hidden = !wrap; 287 288 var scroll_constraint = constraint; 289 scroll_constraint.min_size.width = viewport_width; 290 try self.scroll.build(allocator, scroll_constraint, root_focus); 291 } 292 293 pub fn input(self: *View, allocator: std.mem.Allocator, key: Key, root_focus: *Focus) !void { 294 _ = allocator; 295 const current_tab = self.currentTabIndex() orelse return; 296 if (inp.moveTab(key, current_tab, self.tab_ids.count())) |new_tab| { 297 const tab_id = self.tab_ids.keys()[new_tab]; 298 root_focus.setFocus(tab_id); 299 const tabs_child = self.tabsChild(); 300 const tabs_rect = tabs_child.rect orelse return; 301 const tab = tabs_child.widget.box.children.get(tab_id) orelse return; 302 var rect = tab.rect orelse return; 303 rect.x += tabs_rect.x; 304 rect.y += tabs_rect.y; 305 self.scroll.scrollToRect(rect); 306 } 307 } 308 309 pub fn clearGrid(self: *View) void { 310 self.scroll.clearGrid(); 311 } 312 313 pub fn getGrid(self: View) ?Grid { 314 return self.scroll.getGrid(); 315 } 316 317 pub fn getFocus(self: *View) *Focus { 318 return self.scroll.getFocus(); 319 } 320 321 pub fn getSelectedIndex(self: View) ?usize { 322 return self.currentTabIndex(); 323 } 324 325 fn currentTabIndex(self: View) ?usize { 326 if (self.scroll.child.box.focus.child_id != self.tabs_id) return null; 327 const child_id = self.tabsChild().widget.box.focus.child_id orelse return null; 328 return self.tab_ids.getIndex(child_id); 329 } 330 331 fn tabsChild(self: *const View) *wgt.Box(ui.Widget).Child { 332 return self.scroll.child.box.children.getPtr(self.tabs_id) orelse unreachable; 333 } 334 }; 335