src/apps/cortex/DiagramView/DiagramItem.cpp

   1 /*
   2  * Copyright (c) 1999-2000, Eric Moon.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions, and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions, and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * 3. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  27  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31
  32 // DiagramItem.cpp
  33
  34 #include "DiagramItem.h"
  35 #include "DiagramView.h"
  36
  37 __USE_CORTEX_NAMESPACE
  38
  39 #include <Debug.h>
  40 #define D_METHOD(x) //PRINT(x)
  41
  42 // -------------------------------------------------------- //
  43 // *** static member initialization
  44 // -------------------------------------------------------- //
  45
  46 bigtime_t DiagramItem::m_lastSelectionTime      = 0;
  47 int32 DiagramItem::m_countSelected                      = 0;
  48
  49 // -------------------------------------------------------- //
  50 // *** ctor/dtor (public)
  51 // -------------------------------------------------------- //
  52
  53 DiagramItem::DiagramItem(
  54         uint32 itemType)
  55         : m_type(itemType),
  56           m_view(0),
  57           m_group(0),
  58           m_draggable(false),
  59           m_selectable(true),
  60           m_selected(false),
  61           m_selectionTime(system_time())
  62 {
  63         D_METHOD(("DiagramItem::DiagramItem()\n"));
  64 }
  65
  66 DiagramItem::~DiagramItem()
  67 {
  68         D_METHOD(("DiagramItem::~DiagramItem()\n"));
  69 }
  70
  71 // -------------------------------------------------------- //
  72 // *** operations (public)
  73 // -------------------------------------------------------- //
  74
  75 void DiagramItem::select()
  76 {
  77         D_METHOD(("DiagramItem::select()\n"));
  78         if (!m_selected)
  79         {
  80                 m_selected = true;
  81                 m_lastSelectionTime = m_selectionTime = system_time();
  82                 m_countSelected = 1;
  83                 selected();
  84                 view()->Invalidate(Frame());
  85         }
  86 }
  87
  88 void DiagramItem::selectAdding()
  89 {
  90         D_METHOD(("DiagramItem::selectAdding()\n"));
  91         if (!m_selected)
  92         {
  93                 m_selected = true;
  94                 m_selectionTime = m_lastSelectionTime - m_countSelected++;
  95                 selected();
  96                 view()->Invalidate(Frame());
  97         }
  98 }
  99
 100 void DiagramItem::deselect()
 101 {
 102         D_METHOD(("DiagramItem::deselect()\n"));
 103         if (m_selected)
 104         {
 105                 m_selected = false;
 106                 deselected();
 107                 view()->Invalidate(Frame());
 108         }
 109 }
 110
 111 // -------------------------------------------------------- //
 112 // *** hook functions (public)
 113 // -------------------------------------------------------- //
 114
 115 float DiagramItem::howCloseTo(
 116         BPoint point) const
 117 {
 118         D_METHOD(("DiagramItem::howCloseTo()\n"));
 119         if (Frame().Contains(point))
 120         {
 121                 return 1.0;
 122         }
 123         return 0.0;
 124 }
 125
 126 // -------------------------------------------------------- //
 127 // *** compare functions (friend)
 128 // -------------------------------------------------------- //
 129
 130 int __CORTEX_NAMESPACE__ compareSelectionTime(
 131         const void *lValue,
 132         const void *rValue)
 133 {
 134         D_METHOD(("compareSelectionTime()\n"));
 135         int returnValue = 0;
 136         const DiagramItem *lItem = *(reinterpret_cast<const DiagramItem* const*>(reinterpret_cast<const void* const*>(lValue)));
 137         const DiagramItem *rItem = *(reinterpret_cast<const DiagramItem* const*>(reinterpret_cast<const void* const*>(rValue)));
 138         if (lItem->m_selectionTime < rItem->m_selectionTime)
 139         {
 140                 returnValue = 1;
 141         }
 142         else if (lItem->m_selectionTime > rItem->m_selectionTime)
 143         {
 144                 returnValue = -1;
 145         }
 146         return returnValue;
 147 }
 148
 149 // END -- DiagramItem.cpp --