src/kits/interface/StringItem.cpp

   1 /*
   2  * Copyright 2001-2009, Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Ulrich Wimboeck
   7  *              Marc Flerackers (mflerackers@androme.be)
   8  *              Rene Gollent
   9  */
  10
  11
  12 #include <StringItem.h>
  13
  14 #include <stdlib.h>
  15 #include <string.h>
  16
  17 #include <ControlLook.h>
  18 #include <Message.h>
  19 #include <View.h>
  20
  21
  22 BStringItem::BStringItem(const char* text, uint32 level, bool expanded)
  23         :
  24         BListItem(level, expanded),
  25         fText(NULL),
  26         fBaselineOffset(0)
  27 {
  28         SetText(text);
  29 }
  30
  31
  32 BStringItem::BStringItem(BMessage* archive)
  33         :
  34         BListItem(archive),
  35         fText(NULL),
  36         fBaselineOffset(0)
  37 {
  38         const char* string;
  39         if (archive->FindString("_label", &string) == B_OK)
  40                 SetText(string);
  41 }
  42
  43
  44 BStringItem::~BStringItem()
  45 {
  46         free(fText);
  47 }
  48
  49
  50 BArchivable*
  51 BStringItem::Instantiate(BMessage* archive)
  52 {
  53         if (validate_instantiation(archive, "BStringItem"))
  54                 return new BStringItem(archive);
  55
  56         return NULL;
  57 }
  58
  59
  60 status_t
  61 BStringItem::Archive(BMessage* archive, bool deep) const
  62 {
  63         status_t status = BListItem::Archive(archive);
  64
  65         if (status == B_OK && fText != NULL)
  66                 status = archive->AddString("_label", fText);
  67
  68         return status;
  69 }
  70
  71
  72 void
  73 BStringItem::DrawItem(BView* owner, BRect frame, bool complete)
  74 {
  75         if (fText == NULL)
  76                 return;
  77
  78         rgb_color lowColor = owner->LowColor();
  79
  80         if (IsSelected() || complete) {
  81                 rgb_color color;
  82                 if (IsSelected())
  83                         color = ui_color(B_LIST_SELECTED_BACKGROUND_COLOR);
  84                 else
  85                         color = owner->ViewColor();
  86
  87                 owner->SetLowColor(color);
  88                 owner->FillRect(frame, B_SOLID_LOW);
  89         } else
  90                 owner->SetLowColor(owner->ViewColor());
  91
  92         owner->MovePenTo(frame.left + be_control_look->DefaultLabelSpacing(),
  93                 frame.top + fBaselineOffset);
  94
  95         owner->DrawString(fText);
  96
  97         owner->SetLowColor(lowColor);
  98 }
  99
 100
 101 void
 102 BStringItem::SetText(const char* text)
 103 {
 104         free(fText);
 105         fText = NULL;
 106
 107         if (text)
 108                 fText = strdup(text);
 109 }
 110
 111
 112 const char*
 113 BStringItem::Text() const
 114 {
 115         return fText;
 116 }
 117
 118
 119 void
 120 BStringItem::Update(BView* owner, const BFont* font)
 121 {
 122         if (fText != NULL) {
 123                 SetWidth(font->StringWidth(fText)
 124                         + be_control_look->DefaultLabelSpacing());
 125         }
 126
 127         font_height fheight;
 128         font->GetHeight(&fheight);
 129
 130         fBaselineOffset = 2 + ceilf(fheight.ascent + fheight.leading / 2);
 131
 132         SetHeight(ceilf(fheight.ascent) + ceilf(fheight.descent)
 133                 + ceilf(fheight.leading) + 4);
 134 }
 135
 136
 137 status_t
 138 BStringItem::Perform(perform_code d, void* arg)
 139 {
 140         return BListItem::Perform(d, arg);
 141 }
 142
 143
 144 float
 145 BStringItem::BaselineOffset() const
 146 {
 147         return fBaselineOffset;
 148 }
 149
 150
 151 void BStringItem::_ReservedStringItem1() {}
 152 void BStringItem::_ReservedStringItem2() {}
 153
 154
 155 BStringItem::BStringItem(const BStringItem &)
 156 {
 157 }
 158
 159
 160 BStringItem     &
 161 BStringItem::operator=(const BStringItem &)
 162 {
 163         return *this;
 164 }