src/apps/webpositive/support/BitmapButton.cpp

   1 /*
   2  * Copyright 2010 Stephan Aßmus <superstippi@gmx.de>. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6 #include "BitmapButton.h"
   7
   8 #include <string.h>
   9
  10 #include <Bitmap.h>
  11 #include <ControlLook.h>
  12 #include <TranslationUtils.h>
  13
  14
  15 static const float kFrameInset = 2;
  16
  17
  18 BitmapButton::BitmapButton(const char* resourceName, BMessage* message)
  19         :
  20         BButton("", message),
  21         fBitmap(BTranslationUtils::GetBitmap(resourceName)),
  22         fBackgroundMode(BUTTON_BACKGROUND)
  23 {
  24 }
  25
  26
  27 BitmapButton::BitmapButton(const uint8* bits, uint32 width, uint32 height,
  28                 color_space format, BMessage* message)
  29         :
  30         BButton("", message),
  31         fBitmap(new BBitmap(BRect(0, 0, width - 1, height - 1), 0, format)),
  32         fBackgroundMode(BUTTON_BACKGROUND)
  33 {
  34         memcpy(fBitmap->Bits(), bits, fBitmap->BitsLength());
  35 }
  36
  37
  38 BitmapButton::~BitmapButton()
  39 {
  40         delete fBitmap;
  41 }
  42
  43
  44 BSize
  45 BitmapButton::MinSize()
  46 {
  47         BSize min(0, 0);
  48         if (fBitmap) {
  49                 min.width = fBitmap->Bounds().Width();
  50                 min.height = fBitmap->Bounds().Height();
  51         }
  52         min.width += kFrameInset * 2;
  53         min.height += kFrameInset * 2;
  54         return min;
  55 }
  56
  57
  58 BSize
  59 BitmapButton::MaxSize()
  60 {
  61         return BSize(B_SIZE_UNLIMITED, B_SIZE_UNLIMITED);
  62 }
  63
  64
  65 BSize
  66 BitmapButton::PreferredSize()
  67 {
  68         return MinSize();
  69 }
  70
  71
  72 void
  73 BitmapButton::Draw(BRect updateRect)
  74 {
  75         BRect bounds(Bounds());
  76         rgb_color base = ui_color(B_PANEL_BACKGROUND_COLOR);
  77         uint32 flags = be_control_look->Flags(this);
  78
  79         if (fBackgroundMode == BUTTON_BACKGROUND || Value() == B_CONTROL_ON) {
  80                 be_control_look->DrawButtonBackground(this, bounds, updateRect, base,
  81                         flags);
  82         } else {
  83                 SetHighColor(tint_color(base, B_DARKEN_2_TINT));
  84                 StrokeLine(bounds.LeftBottom(), bounds.RightBottom());
  85                 bounds.bottom--;
  86                 be_control_look->DrawMenuBarBackground(this, bounds, updateRect, base,
  87                         flags);
  88         }
  89
  90         if (fBitmap == NULL)
  91                 return;
  92
  93         SetDrawingMode(B_OP_ALPHA);
  94
  95         if (!IsEnabled()) {
  96                 SetBlendingMode(B_CONSTANT_ALPHA, B_ALPHA_OVERLAY);
  97                 SetHighColor(0, 0, 0, 120);
  98         }
  99
 100         BRect bitmapBounds(fBitmap->Bounds());
 101         BPoint bitmapLocation(
 102                 floorf((bounds.left + bounds.right
 103                         - (bitmapBounds.left + bitmapBounds.right)) / 2 + 0.5f),
 104                 floorf((bounds.top + bounds.bottom
 105                         - (bitmapBounds.top + bitmapBounds.bottom)) / 2 + 0.5f));
 106
 107         DrawBitmap(fBitmap, bitmapLocation);
 108 }
 109
 110
 111 void
 112 BitmapButton::SetBackgroundMode(uint32 mode)
 113 {
 114         if (fBackgroundMode != mode) {
 115                 fBackgroundMode = mode;
 116                 Invalidate();
 117         }
 118 }
 119