src/apps/mediaplayer/interface/SeekSlider.cpp

   1 /*
   2  * Copyright 2006-2010 Stephan Aßmus <superstippi@gmx.de>
   3  * All rights reserved. Distributed under the terms of the MIT License.
   4  */
   5
   6
   7 #include "SeekSlider.h"
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11
  12 #include <ControlLook.h>
  13 #include <Region.h>
  14 #include <Shape.h>
  15
  16
  17 static const rgb_color kThumbRed = (rgb_color){ 255, 52, 52, 255 };
  18
  19
  20 SeekSlider::SeekSlider(const char* name, BMessage* message, int32 minValue,
  21                 int32 maxValue)
  22         :
  23         BSlider(name, NULL, NULL, minValue, maxValue, B_HORIZONTAL,
  24                 B_TRIANGLE_THUMB),
  25         fTracking(false),
  26         fLastTrackTime(0),
  27         fDisabledString(""),
  28         fScale(0.0f)
  29 {
  30         BFont font(be_plain_font);
  31         font.SetSize(9.0);
  32         SetFont(&font);
  33         SetSymbolScale(1.0);
  34         rgb_color fillColor = tint_color(ui_color(B_PANEL_BACKGROUND_COLOR),
  35                 B_DARKEN_3_TINT);
  36         UseFillColor(true, &fillColor);
  37         SetModificationMessage(message);
  38 }
  39
  40
  41 SeekSlider::~SeekSlider()
  42 {
  43 }
  44
  45
  46 status_t
  47 SeekSlider::Invoke(BMessage* message)
  48 {
  49         fLastTrackTime = system_time();
  50         return BSlider::Invoke(message);
  51 }
  52
  53
  54 BRect
  55 SeekSlider::ThumbFrame() const
  56 {
  57         BRect frame = BSlider::ThumbFrame();
  58
  59         float center = (frame.left + frame.right) / 2.0f;
  60         float height = ceilf(frame.Height() * fScale);
  61         float width = ceilf(frame.Width() * fScale);
  62
  63         frame.left = floorf(center - width / 2) + 1;
  64         frame.right = frame.left + width;
  65         frame.bottom = frame.top + height;
  66
  67         return frame;
  68 }
  69
  70
  71 void
  72 SeekSlider::DrawBar()
  73 {
  74         BSlider::DrawBar();
  75         if (IsEnabled())
  76                 return;
  77
  78         BRect r(BarFrame());
  79         font_height fh;
  80         GetFontHeight(&fh);
  81         float width = ceilf(StringWidth(fDisabledString.String()));
  82         BPoint textPos;
  83         textPos.x = r.left + (r.Width() - width) / 2.0;
  84         textPos.y = (r.top + r.bottom - ceilf(fh.ascent + fh.descent)) / 2.0
  85                 + ceilf(fh.ascent);
  86
  87         SetHighColor(tint_color(ui_color(B_PANEL_BACKGROUND_COLOR),
  88                 B_DARKEN_3_TINT));
  89         SetDrawingMode(B_OP_OVER);
  90         DrawString(fDisabledString.String(), textPos);
  91 }
  92
  93
  94 void
  95 SeekSlider::DrawThumb()
  96 {
  97         if (!IsEnabled())
  98                 return;
  99
 100         BRect frame = ThumbFrame();
 101         be_control_look->DrawSliderTriangle(this, frame, frame, kThumbRed, 0,
 102                 B_HORIZONTAL);
 103 }
 104
 105
 106 void
 107 SeekSlider::MouseDown(BPoint where)
 108 {
 109         if (IsEnabled())
 110                 fTracking = true;
 111         BSlider::MouseDown(where);
 112 }
 113
 114
 115 void
 116 SeekSlider::MouseUp(BPoint where)
 117 {
 118         fTracking = false;
 119         BSlider::MouseUp(where);
 120 }
 121
 122
 123 void
 124 SeekSlider::GetPreferredSize(float* _width, float* _height)
 125 {
 126         BSlider::GetPreferredSize(_width, _height);
 127         if (_width != NULL) {
 128                 float minWidth = 15.0 + StringWidth(fDisabledString.String()) + 15.0;
 129                 *_width = max_c(*_width, minWidth);
 130         }
 131         if (_height != NULL) {
 132                 BRect unscaledThumbFrame = BSlider::ThumbFrame();
 133                 BRect scaledThumbFrame = ThumbFrame();
 134                 *_height += scaledThumbFrame.Height() - unscaledThumbFrame.Height();
 135         }
 136 }
 137
 138
 139 BSize
 140 SeekSlider::MinSize()
 141 {
 142         BSize size = BSlider::MinSize();
 143
 144         BRect unscaledThumbFrame = BSlider::ThumbFrame();
 145         BRect scaledThumbFrame = ThumbFrame();
 146         size.height += scaledThumbFrame.Height() - unscaledThumbFrame.Height();
 147
 148         return size;
 149 }
 150
 151
 152 BSize
 153 SeekSlider::MaxSize()
 154 {
 155         BSize size = BSlider::MaxSize();
 156
 157         BRect unscaledThumbFrame = BSlider::ThumbFrame();
 158         BRect scaledThumbFrame = ThumbFrame();
 159         size.height += scaledThumbFrame.Height() - unscaledThumbFrame.Height();
 160
 161         return size;
 162 }
 163
 164
 165 bool
 166 SeekSlider::IsTracking() const
 167 {
 168         if (fTracking)
 169                 return true;
 170         return system_time() - fLastTrackTime < 250000;
 171 }
 172
 173
 174 void
 175 SeekSlider::SetDisabledString(const char* string)
 176 {
 177         if (string == NULL)
 178                 string = "";
 179
 180         if (fDisabledString == string)
 181                 return;
 182
 183         fDisabledString = string;
 184
 185         if (!IsEnabled())
 186                 Invalidate();
 187 }
 188
 189
 190 void
 191 SeekSlider::SetSymbolScale(float scale)
 192 {
 193         if (scale == fScale)
 194                 return;
 195
 196         fScale = scale;
 197         SetBarThickness(fScale * 15.0);
 198         InvalidateLayout();
 199 }
 200
 201