1 /* 2 * Copyright 2010, Haiku, Inc. 3 * Copyright 2006, Ingo Weinhold <bonefish@cs.tu-berlin.de>. 4 * All rights reserved. Distributed under the terms of the MIT License. 5 */ 6 7 8 #include "ViewLayoutItem.h" 9 10 #include <new> 11 12 #include <Layout.h> 13 #include <View.h> 14 #include <ViewPrivate.h> 15 16 17 namespace { 18 const char* const kViewField = "BViewLayoutItem:view"; 19 } 20 21 22 BViewLayoutItem::BViewLayoutItem(BView* view) 23 : 24 fView(view), 25 fAncestorsVisible(true) 26 { 27 } 28 29 30 BViewLayoutItem::BViewLayoutItem(BMessage* from) 31 : 32 BLayoutItem(BUnarchiver::PrepareArchive(from)), 33 fView(NULL), 34 fAncestorsVisible(true) 35 { 36 BUnarchiver unarchiver(from); 37 unarchiver.Finish(unarchiver.FindObject<BView>(kViewField, 0, 38 BUnarchiver::B_DONT_ASSUME_OWNERSHIP, fView)); 39 } 40 41 42 BViewLayoutItem::~BViewLayoutItem() 43 { 44 } 45 46 47 BSize 48 BViewLayoutItem::MinSize() 49 { 50 return fView->MinSize(); 51 } 52 53 54 BSize 55 BViewLayoutItem::MaxSize() 56 { 57 return fView->MaxSize(); 58 } 59 60 61 BSize 62 BViewLayoutItem::PreferredSize() 63 { 64 return fView->PreferredSize(); 65 } 66 67 68 BAlignment 69 BViewLayoutItem::Alignment() 70 { 71 return fView->LayoutAlignment(); 72 } 73 74 75 void 76 BViewLayoutItem::SetExplicitMinSize(BSize size) 77 { 78 fView->SetExplicitMinSize(size); 79 } 80 81 82 void 83 BViewLayoutItem::SetExplicitMaxSize(BSize size) 84 { 85 fView->SetExplicitMaxSize(size); 86 } 87 88 89 void 90 BViewLayoutItem::SetExplicitPreferredSize(BSize size) 91 { 92 fView->SetExplicitPreferredSize(size); 93 } 94 95 96 void 97 BViewLayoutItem::SetExplicitAlignment(BAlignment alignment) 98 { 99 fView->SetExplicitAlignment(alignment); 100 } 101 102 103 bool 104 BViewLayoutItem::IsVisible() 105 { 106 int16 showLevel = BView::Private(fView).ShowLevel(); 107 return showLevel - (fAncestorsVisible ? 0 : 1) <= 0; 108 } 109 110 111 void 112 BViewLayoutItem::SetVisible(bool visible) 113 { 114 if (visible != IsVisible()) { 115 if (visible) 116 fView->Show(); 117 else 118 fView->Hide(); 119 } 120 } 121 122 123 BRect 124 BViewLayoutItem::Frame() 125 { 126 return fView->Frame(); 127 } 128 129 130 void 131 BViewLayoutItem::SetFrame(BRect frame) 132 { 133 fView->MoveTo(frame.LeftTop()); 134 fView->ResizeTo(frame.Width(), frame.Height()); 135 } 136 137 138 bool 139 BViewLayoutItem::HasHeightForWidth() 140 { 141 return fView->HasHeightForWidth(); 142 } 143 144 145 void 146 BViewLayoutItem::GetHeightForWidth(float width, float* min, float* max, 147 float* preferred) 148 { 149 fView->GetHeightForWidth(width, min, max, preferred); 150 } 151 152 153 BView* 154 BViewLayoutItem::View() 155 { 156 return fView; 157 } 158 159 160 void 161 BViewLayoutItem::InvalidateLayout(bool children) 162 { 163 fView->InvalidateLayout(children); 164 } 165 166 167 void 168 BViewLayoutItem::Relayout(bool immediate) 169 { 170 if (immediate) 171 fView->Layout(false); 172 else 173 fView->Relayout(); 174 } 175 176 177 status_t 178 BViewLayoutItem::Archive(BMessage* into, bool deep) const 179 { 180 BArchiver archiver(into); 181 status_t err = BLayoutItem::Archive(into, deep); 182 183 return archiver.Finish(err); 184 } 185 186 187 status_t 188 BViewLayoutItem::AllArchived(BMessage* into) const 189 { 190 BArchiver archiver(into); 191 status_t err = BLayoutItem::AllArchived(into); 192 193 if (err == B_OK) { 194 if (archiver.IsArchived(fView)) 195 err = archiver.AddArchivable(kViewField, fView); 196 else 197 err = B_NAME_NOT_FOUND; 198 } 199 200 return err; 201 } 202 203 204 status_t 205 BViewLayoutItem::AllUnarchived(const BMessage* from) 206 { 207 if (!fView) 208 return B_ERROR; 209 210 return BLayoutItem::AllUnarchived(from); 211 } 212 213 214 BArchivable* 215 BViewLayoutItem::Instantiate(BMessage* from) 216 { 217 if (validate_instantiation(from, "BViewLayoutItem")) 218 return new(std::nothrow) BViewLayoutItem(from); 219 return NULL; 220 } 221 222 223 void 224 BViewLayoutItem::AncestorVisibilityChanged(bool shown) 225 { 226 if (fAncestorsVisible == shown) 227 return; 228 229 fAncestorsVisible = shown; 230 if (shown) 231 fView->Show(); 232 if (!shown) 233 fView->Hide(); 234 } 235 236