src/apps/soundrecorder/UpDownButton.cpp

   1 /*
   2  * Copyright 2005, Jérôme Duval. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Inspired by SoundCapture from Be newsletter (Media Kit Basics: Consumers
   6  * and Producers)
   7  */
   8 #include "UpDownButton.h"
   9 #include "icon_button.h"
  10
  11 UpDownButton::UpDownButton(BRect _rect, BMessage *msg, uint32 resizeFlags)
  12         : BControl(_rect, "button", NULL, msg, resizeFlags, B_WILL_DRAW),
  13         fLastValue(B_CONTROL_ON)
  14 {
  15         BRect rect = BRect(0, 0, kUpDownButtonWidth - 1, kUpDownButtonHeight - 1);
  16         fBitmapUp = new BBitmap(rect, B_CMAP8);
  17         fBitmapUp->SetBits(kButtonUpBits, kUpDownButtonWidth * kUpDownButtonHeight,
  18                 0, B_CMAP8);
  19         fBitmapDown = new BBitmap(rect, B_CMAP8);
  20         fBitmapDown->SetBits(kButtonDownBits, kUpDownButtonWidth
  21                 * kUpDownButtonHeight, 0, B_CMAP8);
  22         fBitmapMiddle = new BBitmap(rect, B_CMAP8);
  23         fBitmapMiddle->SetBits(kButtonMiddleBits, kUpDownButtonWidth
  24                 * kUpDownButtonHeight, 0, B_CMAP8);
  25 }
  26
  27
  28 UpDownButton::~UpDownButton()
  29 {
  30         delete fBitmapUp;
  31         delete fBitmapDown;
  32         delete fBitmapMiddle;
  33 }
  34
  35
  36 void
  37 UpDownButton::Draw(BRect updateRect)
  38 {
  39         SetDrawingMode(B_OP_OVER);
  40
  41         if(IsTracking()) {
  42                 if((Bounds().top + Bounds().Height()/2) > (fTrackingY + 3))
  43                         DrawBitmap(fBitmapUp);
  44                 else if((Bounds().top + Bounds().Height()/2) < (fTrackingY - 3))
  45                         DrawBitmap(fBitmapDown);
  46                 else
  47                         DrawBitmap(fBitmapMiddle);
  48         } else {
  49                 if(Value()==B_CONTROL_OFF)
  50                         DrawBitmap(fBitmapUp);
  51                 else
  52                         DrawBitmap(fBitmapDown);
  53         }
  54
  55         SetDrawingMode(B_OP_COPY);
  56 }
  57
  58
  59 void
  60 UpDownButton::MouseDown(BPoint point)
  61 {
  62         if(!IsEnabled())
  63                 return;
  64
  65         fLastValue = Value();
  66         fTrackingY = (Bounds().top + Bounds().Height()/2);
  67
  68         SetTracking(true);
  69         SetMouseEventMask(B_POINTER_EVENTS, B_LOCK_WINDOW_FOCUS);
  70
  71         SetValue(Value() == B_CONTROL_ON ? B_CONTROL_OFF : B_CONTROL_ON);
  72 }
  73
  74
  75 void
  76 UpDownButton::MouseMoved(BPoint point, uint32 transit, const BMessage *message)
  77 {
  78         if (!IsTracking())
  79                 return;
  80
  81         fTrackingY = point.y;
  82         Draw(Bounds());
  83         Flush();
  84 }
  85
  86
  87 void
  88 UpDownButton::MouseUp(BPoint point)
  89 {
  90         if (!IsTracking())
  91                 return;
  92
  93         if((Bounds().top + Bounds().Height()/2) > (fTrackingY + 3))
  94                 SetValue(B_CONTROL_ON);
  95         else if((Bounds().top + Bounds().Height()/2) < (fTrackingY - 3))
  96                 SetValue(B_CONTROL_OFF);
  97
  98         if(Value()!=fLastValue)
  99                 Invoke();
 100         SetTracking(false);
 101         Draw(Bounds());
 102         Flush();
 103         fLastValue = Value();
 104 }