src/apps/charactermap/UnicodeBlockView.cpp

   1 /*
   2  * Copyright 2009, Axel Dörfler, axeld@pinc-software.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6
   7 #include "UnicodeBlockView.h"
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11
  12 #include "UnicodeBlocks.h"
  13
  14
  15 BlockListItem::BlockListItem(const char* label, uint32 blockIndex)
  16         : BStringItem(label),
  17         fBlockIndex(blockIndex)
  18 {
  19 }
  20
  21
  22 //      #pragma mark -
  23
  24
  25 UnicodeBlockView::UnicodeBlockView(const char* name)
  26         : BListView(name),
  27         fBlocks(kNumUnicodeBlocks, true),
  28         fShowPrivateBlocks(false),
  29         fShowContainedBlocksOnly(false)
  30 {
  31         _CreateBlocks();
  32 }
  33
  34
  35 UnicodeBlockView::~UnicodeBlockView()
  36 {
  37 }
  38
  39
  40 void
  41 UnicodeBlockView::SetFilter(const char* filter)
  42 {
  43         fFilter = filter;
  44         _UpdateBlocks();
  45 }
  46
  47
  48 void
  49 UnicodeBlockView::ShowPrivateBlocks(bool show)
  50 {
  51         if (fShowPrivateBlocks == show)
  52                 return;
  53
  54         fShowPrivateBlocks = show;
  55         _UpdateBlocks();
  56 }
  57
  58
  59 void
  60 UnicodeBlockView::ShowContainedBlocksOnly(bool show)
  61 {
  62         if (fShowContainedBlocksOnly == show)
  63                 return;
  64
  65         fShowContainedBlocksOnly = show;
  66         _UpdateBlocks();
  67 }
  68
  69
  70 bool
  71 UnicodeBlockView::IsShowingBlock(int32 blockIndex) const
  72 {
  73         if (blockIndex < 0 || blockIndex >= (int32)kNumUnicodeBlocks)
  74                 return false;
  75
  76         if (!fShowPrivateBlocks && kUnicodeBlocks[blockIndex].private_block)
  77                 return false;
  78
  79         return true;
  80 }
  81
  82
  83 void
  84 UnicodeBlockView::_UpdateBlocks()
  85 {
  86         MakeEmpty();
  87
  88         for (int32 i = 0; i < fBlocks.CountItems(); i++) {
  89                 if (fFilter.Length() != 0) {
  90                         if (strcasestr(kUnicodeBlocks[i].name, fFilter.String()) == NULL)
  91                                 continue;
  92                 }
  93
  94                 if (!IsShowingBlock(i))
  95                         continue;
  96
  97                 AddItem(fBlocks.ItemAt(i));
  98         }
  99 }
 100
 101
 102 void
 103 UnicodeBlockView::_CreateBlocks()
 104 {
 105         float minWidth = 0;
 106         for (uint32 i = 0; i < kNumUnicodeBlocks; i++) {
 107                 BlockListItem* item = new BlockListItem(kUnicodeBlocks[i].name, i);
 108                 fBlocks.AddItem(item);
 109
 110                 float width = StringWidth(item->Text());
 111                 if (minWidth < width)
 112                         minWidth = width;
 113         }
 114
 115         SetExplicitMinSize(BSize(minWidth / 2, 32));
 116         SetExplicitMaxSize(BSize(minWidth, B_SIZE_UNSET));
 117
 118         _UpdateBlocks();
 119 }
 120
 121
 122 void
 123 UnicodeBlockView::SelectBlockForCharacter(uint32 character)
 124 {
 125         // find block containing the character
 126         int32 blockNumber = BlockForCharacter(character);
 127
 128         if (blockNumber > 0) {
 129                 BlockListItem* block = fBlocks.ItemAt(blockNumber);
 130
 131                 int32 blockIndex = IndexOf(block);
 132
 133                 if (blockIndex >= 0) {
 134                         Select(blockIndex);
 135                         ScrollToSelection();
 136                 }
 137         }
 138 }