cppconsui/Panel.cpp

   1 // Copyright (C) 2007 Mark Pustjens <pustjens@dds.nl>
   2 // Copyright (C) 2010-2015 Petr Pavlu <setup@dagobah.cz>
   3 //
   4 // This file is part of CenterIM.
   5 //
   6 // CenterIM is free software; you can redistribute it and/or modify
   7 // it under the terms of the GNU General Public License as published by
   8 // the Free Software Foundation; either version 2 of the License, or
   9 // (at your option) any later version.
  10 //
  11 // CenterIM is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License
  17 // along with CenterIM.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 /// @file
  20 /// Panel class implementation.
  21 ///
  22 /// @ingroup cppconsui
  23
  24 #include "Panel.h"
  25
  26 #include "ColorScheme.h"
  27
  28 #include <algorithm>
  29 #include <cstring>
  30
  31 namespace CppConsUI {
  32
  33 Panel::Panel(int w, int h, const char *text)
  34   : Widget(w, h), title_(nullptr), title_width_(0)
  35 {
  36   setTitle(text);
  37 }
  38
  39 Panel::~Panel()
  40 {
  41   delete[] title_;
  42 }
  43
  44 int Panel::draw(Curses::ViewPort area, Error &error)
  45 {
  46   int attrs, i;
  47
  48   // Calculate title width.
  49   int draw_title_width = 0;
  50   if (real_width_ > 4)
  51     draw_title_width = real_width_ - 4;
  52   draw_title_width = std::min(draw_title_width, title_width_);
  53
  54   // Calculate horizontal line length (one segment width).
  55   int hline_len = 0;
  56   int extra = draw_title_width ? 4 : 2;
  57   if (real_width_ > draw_title_width + extra)
  58     hline_len = (real_width_ - draw_title_width - extra) / 2;
  59
  60   if (draw_title_width) {
  61     // Draw title.
  62     DRAW(getAttributes(ColorScheme::PROPERTY_PANEL_TITLE, &attrs, error));
  63     DRAW(area.attrOn(attrs, error));
  64     DRAW(area.addString(2 + hline_len, 0, draw_title_width, title_, error));
  65     DRAW(area.attrOff(attrs, error));
  66   }
  67
  68   // Draw lines.
  69   DRAW(getAttributes(ColorScheme::PROPERTY_PANEL_LINE, &attrs, error));
  70   DRAW(area.attrOn(attrs, error));
  71
  72   // Draw top horizontal line.
  73   for (i = 1; i < 1 + hline_len; ++i)
  74     DRAW(area.addLineChar(i, 0, Curses::LINE_HLINE, error));
  75   for (i = 1 + hline_len + extra - 2 + draw_title_width; i < real_width_ - 1;
  76        ++i)
  77     DRAW(area.addLineChar(i, 0, Curses::LINE_HLINE, error));
  78
  79   // Draw bottom horizontal line.
  80   for (i = 1; i < real_width_ - 1; ++i)
  81     DRAW(area.addLineChar(i, real_height_ - 1, Curses::LINE_HLINE, error));
  82
  83   // Draw left and right vertical line.
  84   for (i = 1; i < real_height_ - 1; ++i)
  85     DRAW(area.addLineChar(0, i, Curses::LINE_VLINE, error));
  86   for (i = 1; i < real_height_ - 1; ++i)
  87     DRAW(area.addLineChar(real_width_ - 1, i, Curses::LINE_VLINE, error));
  88
  89   // Draw corners.
  90   DRAW(area.addLineChar(0, 0, Curses::LINE_ULCORNER, error));
  91   DRAW(area.addLineChar(real_width_ - 1, 0, Curses::LINE_URCORNER, error));
  92   DRAW(area.addLineChar(0, real_height_ - 1, Curses::LINE_LLCORNER, error));
  93   DRAW(area.addLineChar(
  94     real_width_ - 1, real_height_ - 1, Curses::LINE_LRCORNER, error));
  95
  96   DRAW(area.attrOff(attrs, error));
  97
  98   return 0;
  99 }
 100
 101 void Panel::setTitle(const char *new_title)
 102 {
 103   std::size_t size = 1;
 104   if (new_title != nullptr)
 105     size += std::strlen(new_title);
 106   auto new_storage = new char[size];
 107   if (new_title != nullptr)
 108     std::strcpy(new_storage, new_title);
 109   else
 110     new_storage[0] = '\0';
 111
 112   delete[] title_;
 113   title_ = new_storage;
 114
 115   title_width_ = Curses::onScreenWidth(title_);
 116   redraw();
 117 }
 118
 119 } // namespace CppConsUI
 120
 121 // vim: set tabstop=2 shiftwidth=2 textwidth=80 expandtab: