source/gui/CGUIScrollBarVertical.cpp

   1 /* Copyright (C) 2016 Wildfire Games.
   2  * This file is part of 0 A.D.
   3  *
   4  * 0 A.D. is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * 0 A.D. is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "precompiled.h"
  19
  20 #include "CGUIScrollBarVertical.h"
  21
  22 #include "GUI.h"
  23
  24 #include "ps/CLogger.h"
  25
  26
  27 CGUIScrollBarVertical::CGUIScrollBarVertical()
  28 {
  29 }
  30
  31 CGUIScrollBarVertical::~CGUIScrollBarVertical()
  32 {
  33 }
  34
  35 void CGUIScrollBarVertical::SetPosFromMousePos(const CPos& mouse)
  36 {
  37         if (!GetStyle())
  38                 return;
  39
  40         /**
  41          * Calculate the position for the top of the item being scrolled
  42          */
  43         float emptyBackground = m_Length - m_BarSize;
  44
  45         if (GetStyle()->m_UseEdgeButtons)
  46                 emptyBackground -= GetStyle()->m_Width * 2;
  47
  48         m_Pos = m_PosWhenPressed + GetMaxPos() * (mouse.y - m_BarPressedAtPos.y) / emptyBackground;
  49 }
  50
  51 void CGUIScrollBarVertical::Draw()
  52 {
  53         if (!GetStyle())
  54         {
  55                 LOGWARNING("Attempt to draw scrollbar without a style.");
  56                 return;
  57         }
  58
  59         if (GetGUI() && IsVisible())
  60         {
  61                 CRect outline = GetOuterRect();
  62
  63                 GetGUI()->DrawSprite(
  64                         GetStyle()->m_SpriteBackVertical,
  65                         0,
  66                         m_Z+0.1f,
  67                         CRect(
  68                                 outline.left,
  69                                 outline.top + (GetStyle()->m_UseEdgeButtons ? GetStyle()->m_Width : 0),
  70                                 outline.right,
  71                                 outline.bottom - (GetStyle()->m_UseEdgeButtons ? GetStyle()->m_Width : 0)
  72                         )
  73                 );
  74
  75                 if (GetStyle()->m_UseEdgeButtons)
  76                 {
  77                         const CGUISpriteInstance* button_top;
  78                         const CGUISpriteInstance* button_bottom;
  79
  80                         if (m_ButtonMinusHovered)
  81                         {
  82                                 if (m_ButtonMinusPressed)
  83                                         button_top = &GUI<>::FallBackSprite(GetStyle()->m_SpriteButtonTopPressed, GetStyle()->m_SpriteButtonTop);
  84                                 else
  85                                         button_top = &GUI<>::FallBackSprite(GetStyle()->m_SpriteButtonTopOver, GetStyle()->m_SpriteButtonTop);
  86                         }
  87                         else
  88                                 button_top = &GetStyle()->m_SpriteButtonTop;
  89
  90                         if (m_ButtonPlusHovered)
  91                         {
  92                                 if (m_ButtonPlusPressed)
  93                                         button_bottom = &GUI<>::FallBackSprite(GetStyle()->m_SpriteButtonBottomPressed, GetStyle()->m_SpriteButtonBottom);
  94                                 else
  95                                         button_bottom = &GUI<>::FallBackSprite(GetStyle()->m_SpriteButtonBottomOver, GetStyle()->m_SpriteButtonBottom);
  96                         }
  97                         else
  98                                 button_bottom = &GetStyle()->m_SpriteButtonBottom;
  99
 100                         GetGUI()->DrawSprite(
 101                                 *button_top,
 102                                 0,
 103                                 m_Z+0.2f,
 104                                 CRect(
 105                                         outline.left,
 106                                         outline.top,
 107                                         outline.right,
 108                                         outline.top+GetStyle()->m_Width
 109                                 )
 110                         );
 111
 112                         GetGUI()->DrawSprite(
 113                                 *button_bottom,
 114                                 0,
 115                                 m_Z+0.2f,
 116                                 CRect(
 117                                         outline.left,
 118                                         outline.bottom-GetStyle()->m_Width,
 119                                         outline.right,
 120                                         outline.bottom
 121                                 )
 122                         );
 123                 }
 124
 125                 GetGUI()->DrawSprite(
 126                         GetStyle()->m_SpriteBarVertical,
 127                         0,
 128                         m_Z + 0.2f,
 129                         GetBarRect()
 130                 );
 131         }
 132 }
 133
 134 void CGUIScrollBarVertical::HandleMessage(SGUIMessage& Message)
 135 {
 136         IGUIScrollBar::HandleMessage(Message);
 137 }
 138
 139 CRect CGUIScrollBarVertical::GetBarRect() const
 140 {
 141         CRect ret;
 142         if (!GetStyle())
 143                 return ret;
 144
 145         // Get from where the scroll area begins to where it ends
 146         float from = m_Y;
 147         float to = m_Y + m_Length - m_BarSize;
 148
 149         if (GetStyle()->m_UseEdgeButtons)
 150         {
 151                 from += GetStyle()->m_Width;
 152                 to -= GetStyle()->m_Width;
 153         }
 154
 155         ret.top = from + (to - from) * m_Pos / GetMaxPos();
 156         ret.bottom = ret.top + m_BarSize;
 157         ret.right = m_X + (m_RightAligned ? 0 : GetStyle()->m_Width);
 158         ret.left = ret.right - GetStyle()->m_Width;
 159
 160         return ret;
 161 }
 162
 163 CRect CGUIScrollBarVertical::GetOuterRect() const
 164 {
 165         CRect ret;
 166         if (!GetStyle())
 167                 return ret;
 168
 169         ret.top = m_Y;
 170         ret.bottom = m_Y+m_Length;
 171         ret.right = m_X + (m_RightAligned ? 0 : GetStyle()->m_Width);
 172         ret.left = ret.right - GetStyle()->m_Width;
 173
 174         return ret;
 175 }
 176
 177 bool CGUIScrollBarVertical::HoveringButtonMinus(const CPos& mouse)
 178 {
 179         if (!GetStyle())
 180                 return false;
 181
 182         float StartX = m_RightAligned ? m_X-GetStyle()->m_Width : m_X;
 183
 184         return mouse.x >= StartX &&
 185                mouse.x <= StartX + GetStyle()->m_Width &&
 186                mouse.y >= m_Y &&
 187                mouse.y <= m_Y + GetStyle()->m_Width;
 188 }
 189
 190 bool CGUIScrollBarVertical::HoveringButtonPlus(const CPos& mouse)
 191 {
 192         if (!GetStyle())
 193                 return false;
 194
 195         float StartX = m_RightAligned ? m_X-GetStyle()->m_Width : m_X;
 196
 197         return mouse.x > StartX &&
 198                mouse.x < StartX + GetStyle()->m_Width &&
 199                mouse.y > m_Y + m_Length - GetStyle()->m_Width &&
 200                mouse.y < m_Y + m_Length;
 201 }