ControlAdjuster.h

   1 /*
   2  * Copyright (c) 2003, Frank Richter <frichter@gmx.li>
   3  * Copyrught (c) 2003, Robert Collins <rbtcollins@hotmail.com>
   4  *
   5  *     This program is free software; you can redistribute it and/or modify
   6  *     it under the terms of the GNU General Public License as published by
   7  *     the Free Software Foundation; either version 2 of the License, or
   8  *     (at your option) any later version.
   9  *
  10  *     A copy of the GNU General Public License can be found at
  11  *     http://www.gnu.org/
  12  *
  13  * Written by Frank Richter.
  14  *
  15  */
  16
  17 #ifndef SETUP_CONTROLADJUSTER_H
  18 #define SETUP_CONTROLADJUSTER_H
  19
  20 #include <vector>
  21
  22 #include "win32.h"
  23 #include "RECTWrapper.h"
  24
  25 /*
  26   This is a helper class to move/resize controls of a dialog when it's size
  27   is changed. It's no fancy layouting stuff, but rather just moving them
  28   around - to, for example, keep controls at the bottom really at the bottom
  29   when the size changes.
  30  */
  31
  32 enum ControlPosition {
  33   CP_LEFT = 0,
  34   CP_TOP = CP_LEFT,
  35   CP_CENTERED,
  36   CP_RIGHT,
  37   CP_BOTTOM = CP_RIGHT,
  38   CP_STRETCH,
  39   CP_STRETCH_LEFTHALF,
  40   CP_STRETCH_TOPHALF = CP_STRETCH_LEFTHALF,
  41   CP_STRETCH_RIGHTHALF,
  42   CP_STRETCH_BOTTOMHALF = CP_STRETCH_RIGHTHALF
  43 };
  44
  45 /* left and right double as top and bottom. better labels sought. */
  46 class ControlDimension
  47 {
  48   public:
  49     ControlDimension(long &anInt1, long &anInt2) :
  50       left(anInt1), right (anInt2){}
  51     long &left;
  52     long &right;
  53 };
  54
  55 class ControlAdjuster
  56 {
  57 public:
  58   struct ControlInfo
  59   {
  60     void adjust(HWND dlg, int widthChange, int heightChange) const;
  61     // Control ID
  62     int control;
  63     /*
  64      * Position specifiers.
  65      */
  66     ControlPosition horizontalPos;
  67     ControlPosition verticalPos;
  68     private:
  69       void adjust (ControlPosition const &how, ControlDimension &where, int by) const;
  70   };
  71
  72   /*
  73     Adjust all the controls.
  74     'controlInfo' an array with the moving information.
  75     The terminating item of the array should have an ID <= 0.
  76    */
  77   static void AdjustControls (HWND dlg, const ControlInfo controlInfo[],
  78     int widthChange, int heightChange);
  79 };
  80
  81 class SizeProcessor
  82 {
  83   typedef std::vector<const ControlAdjuster::ControlInfo*> ControlInfos;
  84   ControlInfos controlInfos;
  85   bool rectValid;
  86   RECTWrapper lastRect;
  87 public:
  88   SizeProcessor ();
  89
  90   void AddControlInfo (const ControlAdjuster::ControlInfo* controlInfo);
  91   void UpdateSize (HWND dlg);
  92 };
  93
  94 #endif // SETUP_CONTROLADJUSTER_H