gui/message.cpp

   1 /* ScummVM - Graphic Adventure Engine
   2  *
   3  * ScummVM is the legal property of its developers, whose names
   4  * are too numerous to list here. Please refer to the COPYRIGHT
   5  * file distributed with this source distribution.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  *
  21  * $URL$
  22  * $Id$
  23  */
  24
  25 #include "common/events.h"
  26 #include "common/str.h"
  27 #include "common/system.h"
  28 #include "gui/message.h"
  29 #include "gui/GuiManager.h"
  30 #include "gui/ThemeEval.h"
  31 #include "gui/widget.h"
  32
  33 namespace GUI {
  34
  35 enum {
  36         kOkCmd = 'OK  ',
  37         kCancelCmd = 'CNCL'
  38 };
  39
  40
  41 // TODO: The default button should be visibly distinct from the alternate button
  42
  43 MessageDialog::MessageDialog(const Common::String &message, const char *defaultButton, const char *altButton)
  44         : Dialog(30, 20, 260, 124) {
  45
  46         const int screenW = g_system->getOverlayWidth();
  47         const int screenH = g_system->getOverlayHeight();
  48
  49         int buttonWidth = g_gui.xmlEval()->getVar("Globals.Button.Width", 0);
  50         int buttonHeight = g_gui.xmlEval()->getVar("Globals.Button.Height", 0);
  51
  52         // First, determine the size the dialog needs. For this we have to break
  53         // down the string into lines, and taking the maximum of their widths.
  54         // Using this, and accounting for the space the button(s) need, we can set
  55         // the real size of the dialog
  56         Common::StringList lines;
  57         int lineCount, okButtonPos, cancelButtonPos;
  58         int maxlineWidth = g_gui.getFont().wordWrapText(message, screenW - 2 * 20, lines);
  59
  60         // Calculate the desired dialog size (maxing out at 300*180 for now)
  61         _w = maxlineWidth + 20;
  62         lineCount = lines.size();
  63
  64         _h = 16;
  65         if (defaultButton || altButton)
  66                 _h += buttonHeight + 8;
  67
  68         // Limit the number of lines so that the dialog still fits on the screen.
  69         if (lineCount > (screenH - 20 - _h) / kLineHeight) {
  70                 lineCount = (screenH - 20 - _h) / kLineHeight;
  71         }
  72         _h += lineCount * kLineHeight;
  73
  74         // Center the dialog
  75         _x = (screenW - _w) / 2;
  76         _y = (screenH - _h) / 2;
  77
  78         // Each line is represented by one static text item.
  79         for (int i = 0; i < lineCount; i++) {
  80                 new StaticTextWidget(this, 10, 10 + i * kLineHeight, maxlineWidth, kLineHeight,
  81                                                                 lines[i], Graphics::kTextAlignCenter);
  82         }
  83
  84         if (defaultButton && altButton) {
  85                 okButtonPos = (_w - (buttonWidth * 2)) / 2;
  86                 cancelButtonPos = ((_w - (buttonWidth * 2)) / 2) + buttonWidth + 10;
  87         } else {
  88                 okButtonPos = cancelButtonPos = (_w - buttonWidth) / 2;
  89         }
  90
  91         if (defaultButton)
  92                 new ButtonWidget(this, okButtonPos, _h - buttonHeight - 8, buttonWidth, buttonHeight, defaultButton, kOkCmd, Common::ASCII_RETURN);     // Confirm dialog
  93
  94         if (altButton)
  95                 new ButtonWidget(this, cancelButtonPos, _h - buttonHeight - 8, buttonWidth, buttonHeight, altButton, kCancelCmd, Common::ASCII_ESCAPE); // Cancel dialog
  96 }
  97
  98 void MessageDialog::handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {
  99         // FIXME: It's a really bad thing that we use two arbitrary constants
 100         if (cmd == kOkCmd) {
 101                 setResult(kMessageOK);
 102                 close();
 103         } else if (cmd == kCancelCmd) {
 104                 setResult(kMessageCancel);
 105                 close();
 106         } else {
 107                 Dialog::handleCommand(sender, cmd, data);
 108         }
 109 }
 110
 111 TimedMessageDialog::TimedMessageDialog(const Common::String &message, uint32 duration)
 112         : MessageDialog(message, 0, 0) {
 113         _timer = getMillis() + duration;
 114 }
 115
 116 void TimedMessageDialog::handleTickle() {
 117         MessageDialog::handleTickle();
 118         if (getMillis() > _timer)
 119                 close();
 120 }
 121
 122 } // End of namespace GUI