src/kits/interface/layouter/Layouter.h

   1 /*
   2  * Copyright 2006, Haiku Inc.
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef LAYOUTER_H
   6 #define LAYOUTER_H
   7
   8 #include <SupportDefs.h>
   9
  10 namespace BPrivate {
  11 namespace Layout {
  12
  13 class LayoutInfo {
  14 public:
  15                                                                 LayoutInfo();
  16         virtual                                         ~LayoutInfo();
  17
  18         virtual float                           ElementLocation(int32 element) = 0;
  19         virtual float                           ElementSize(int32 element) = 0;
  20
  21         virtual float                           ElementRangeSize(int32 position, int32 length);
  22 };
  23
  24
  25 class Layouter {
  26 public:
  27                                                                 Layouter();
  28         virtual                                         ~Layouter();
  29
  30         virtual void                            AddConstraints(int32 element, int32 length,
  31                                                                         float min, float max, float preferred) = 0;
  32         virtual void                            SetWeight(int32 element, float weight) = 0;
  33
  34         virtual float                           MinSize() = 0;
  35         virtual float                           MaxSize() = 0;
  36         virtual float                           PreferredSize() = 0;
  37
  38         virtual LayoutInfo*                     CreateLayoutInfo() = 0;
  39
  40         virtual void                            Layout(LayoutInfo* layoutInfo, float size) = 0;
  41
  42         virtual Layouter*                       CloneLayouter() = 0;
  43 };
  44
  45
  46 }       // namespace Layout
  47 }       // namespace BPrivate
  48
  49 using BPrivate::Layout::LayoutInfo;
  50 using BPrivate::Layout::Layouter;
  51
  52 #endif  // LAYOUTER_H