src/preferences/screensaver/ScreenCornerSelector.cpp

   1 /*
   2  * Copyright 2003-2013 Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Michael Phipps
   7  *              Axel Dörfler, axeld@pinc-software.de
   8  */
   9
  10 #include "ScreenCornerSelector.h"
  11
  12 #include <stdio.h>
  13
  14 #include <Rect.h>
  15 #include <Point.h>
  16 #include <Shape.h>
  17 #include <Screen.h>
  18 #include <Window.h>
  19
  20 #include "Constants.h"
  21 #include "Utility.h"
  22
  23
  24 static const float kAspectRatio = 4.0f / 3.0f;
  25 static const float kMonitorBorderSize = 3.0f;
  26 static const float kArrowSize = 11.0f;
  27 static const float kStopSize = 15.0f;
  28
  29
  30 ScreenCornerSelector::ScreenCornerSelector(BRect frame, const char* name,
  31         BMessage* message, uint32 resizingMode)
  32         :
  33         BControl(frame, name, NULL, message, resizingMode,
  34                 B_WILL_DRAW | B_NAVIGABLE | B_FULL_UPDATE_ON_RESIZE),
  35         fCurrentCorner(NO_CORNER),
  36         fPreviousCorner(-1)
  37 {
  38         SetViewUIColor(B_PANEL_BACKGROUND_COLOR);
  39 }
  40
  41
  42 BRect
  43 ScreenCornerSelector::_MonitorFrame() const
  44 {
  45         float width = Bounds().Width();
  46         float height = Bounds().Height();
  47
  48         if (width / kAspectRatio > height)
  49                 width = height * kAspectRatio;
  50         else if (height * kAspectRatio > width)
  51                 height = width / kAspectRatio;
  52
  53         return BRect((Bounds().Width() - width) / 2,
  54                 (Bounds().Height() - height) / 2,
  55                 (Bounds().Width() + width) / 2, (Bounds().Height() + height) / 2);
  56 }
  57
  58
  59 BRect
  60 ScreenCornerSelector::_InnerFrame(BRect monitorFrame) const
  61 {
  62         return monitorFrame.InsetByCopy(kMonitorBorderSize + 3,
  63                 kMonitorBorderSize + 3);
  64 }
  65
  66
  67 BRect
  68 ScreenCornerSelector::_CenterFrame(BRect innerFrame) const
  69 {
  70         return innerFrame.InsetByCopy(kArrowSize, kArrowSize);
  71 }
  72
  73
  74 void
  75 ScreenCornerSelector::Draw(BRect updateRect)
  76 {
  77         rgb_color darkColor = {160, 160, 160, 255};
  78         rgb_color blackColor = {0, 0, 0, 255};
  79         rgb_color redColor = {228, 0, 0, 255};
  80
  81         BRect outerRect = _MonitorFrame();
  82         BRect innerRect(outerRect.InsetByCopy(kMonitorBorderSize + 2,
  83                 kMonitorBorderSize + 2));
  84
  85         SetDrawingMode(B_OP_OVER);
  86
  87         if (!_InnerFrame(outerRect).Contains(updateRect)) {
  88                 // frame & background
  89
  90                 // if the focus is changing, we don't redraw the whole view, but only
  91                 // the part that's affected by the change
  92                 if (!IsFocusChanging()) {
  93                         SetHighColor(darkColor);
  94                         FillRoundRect(outerRect, kMonitorBorderSize * 3 / 2,
  95                                 kMonitorBorderSize * 3 / 2);
  96                 }
  97
  98                 if (IsFocus() && Window()->IsActive())
  99                         SetHighColor(ui_color(B_KEYBOARD_NAVIGATION_COLOR));
 100                 else
 101                         SetHighColor(blackColor);
 102
 103                 StrokeRoundRect(outerRect, kMonitorBorderSize * 3 / 2,
 104                         kMonitorBorderSize * 3 / 2);
 105
 106                 if (IsFocusChanging())
 107                         return;
 108
 109                 // power light
 110
 111                 SetHighColor(redColor);
 112                 BPoint powerPos(outerRect.left + kMonitorBorderSize * 2, outerRect.bottom
 113                         - kMonitorBorderSize);
 114                 StrokeLine(powerPos, BPoint(powerPos.x + 2, powerPos.y));
 115         }
 116
 117         if (!IsFocusChanging()) {
 118                 SetHighColor(210, 210, 255);
 119                 FillRoundRect(innerRect, kMonitorBorderSize, kMonitorBorderSize);
 120         }
 121
 122         if (IsFocus() && Window()->IsActive())
 123                 SetHighColor(ui_color(B_KEYBOARD_NAVIGATION_COLOR));
 124         else
 125                 SetHighColor(blackColor);
 126         StrokeRoundRect(innerRect, kMonitorBorderSize, kMonitorBorderSize);
 127
 128         innerRect = _InnerFrame(outerRect);
 129
 130         if (fCurrentCorner != NO_CORNER)
 131                 _DrawArrow(innerRect);
 132         else
 133                 _DrawStop(innerRect);
 134
 135         SetDrawingMode(B_OP_COPY);
 136 }
 137
 138
 139 int32
 140 ScreenCornerSelector::Value()
 141 {
 142         return (int32)fCurrentCorner;
 143 }
 144
 145
 146 void
 147 ScreenCornerSelector::SetValue(int32 corner)
 148 {
 149         switch (corner) {
 150                 case UP_LEFT_CORNER:
 151                 case UP_RIGHT_CORNER:
 152                 case DOWN_LEFT_CORNER:
 153                 case DOWN_RIGHT_CORNER:
 154                 case NO_CORNER:
 155                         break;
 156
 157                 default:
 158                         corner = NO_CORNER;
 159         }
 160         if ((screen_corner)corner == fCurrentCorner)
 161                 return;
 162
 163         fCurrentCorner = (screen_corner)corner;
 164         Invalidate(_InnerFrame(_MonitorFrame()));
 165         Invoke();
 166 }
 167
 168
 169 screen_corner
 170 ScreenCornerSelector::Corner() const
 171 {
 172         return fCurrentCorner;
 173 }
 174
 175
 176 void
 177 ScreenCornerSelector::SetCorner(screen_corner corner)
 178 {
 179         // redirected to SetValue() to make sure only valid values are set
 180         SetValue((int32)corner);
 181 }
 182
 183
 184 void
 185 ScreenCornerSelector::_DrawStop(BRect innerFrame)
 186 {
 187         BRect centerRect = _CenterFrame(innerFrame);
 188         float size = kStopSize;
 189         BRect rect;
 190         rect.left = centerRect.left + (centerRect.Width() - size) / 2;
 191         rect.top = centerRect.top + (centerRect.Height() - size) / 2;
 192         if (rect.left < centerRect.left || rect.top < centerRect.top) {
 193                 size = centerRect.Height();
 194                 rect.top = centerRect.top;
 195                 rect.left = centerRect.left + (centerRect.Width() - size) / 2;
 196         }
 197         rect.right = rect.left + size - 1;
 198         rect.bottom = rect.top + size - 1;
 199
 200         SetHighColor(255, 0, 0);
 201         SetPenSize(2);
 202         SetFlags(Flags() | B_SUBPIXEL_PRECISE);
 203
 204         StrokeEllipse(rect);
 205
 206         size -= sin(M_PI / 4) * size + 2;
 207         rect.InsetBy(size, size);
 208         StrokeLine(rect.RightTop(), rect.LeftBottom());
 209
 210         SetFlags(Flags() & ~B_SUBPIXEL_PRECISE);
 211         SetPenSize(1);
 212 }
 213
 214
 215 void
 216 ScreenCornerSelector::_DrawArrow(BRect innerFrame)
 217 {
 218         float size = kArrowSize;
 219         float sizeX = fCurrentCorner == UP_LEFT_CORNER
 220                 || fCurrentCorner == DOWN_LEFT_CORNER ? size : -size;
 221         float sizeY = fCurrentCorner == UP_LEFT_CORNER
 222                 || fCurrentCorner == UP_RIGHT_CORNER ? size : -size;
 223
 224         innerFrame.InsetBy(2, 2);
 225         BPoint origin(sizeX < 0 ? innerFrame.right : innerFrame.left,
 226                 sizeY < 0 ? innerFrame.bottom : innerFrame.top);
 227
 228         SetHighColor(kBlack);
 229         FillTriangle(BPoint(origin.x, origin.y), BPoint(origin.x, origin.y + sizeY),
 230                 BPoint(origin.x + sizeX, origin.y));
 231 }
 232
 233
 234 screen_corner
 235 ScreenCornerSelector::_ScreenCorner(BPoint point,
 236         screen_corner previousCorner) const
 237 {
 238         BRect innerFrame = _InnerFrame(_MonitorFrame());
 239
 240         if (!innerFrame.Contains(point))
 241                 return previousCorner;
 242
 243         if (_CenterFrame(innerFrame).Contains(point))
 244                 return NO_CORNER;
 245
 246         float centerX = innerFrame.left + innerFrame.Width() / 2;
 247         float centerY = innerFrame.top + innerFrame.Height() / 2;
 248         if (point.x < centerX)
 249                 return point.y < centerY ? UP_LEFT_CORNER : DOWN_LEFT_CORNER;
 250
 251         return point.y < centerY ? UP_RIGHT_CORNER : DOWN_RIGHT_CORNER;
 252 }
 253
 254
 255 void
 256 ScreenCornerSelector::MouseDown(BPoint where)
 257 {
 258         fPreviousCorner = Value();
 259
 260         SetValue(_ScreenCorner(where, (screen_corner)fPreviousCorner));
 261         SetMouseEventMask(B_POINTER_EVENTS, B_NO_POINTER_HISTORY);
 262 }
 263
 264
 265 void
 266 ScreenCornerSelector::MouseUp(BPoint where)
 267 {
 268         fPreviousCorner = -1;
 269 }
 270
 271
 272 void
 273 ScreenCornerSelector::MouseMoved(BPoint where, uint32 transit,
 274         const BMessage* dragMessage)
 275 {
 276         if (fPreviousCorner == -1)
 277                 return;
 278
 279         SetValue(_ScreenCorner(where, (screen_corner)fPreviousCorner));
 280 }
 281
 282
 283 void
 284 ScreenCornerSelector::KeyDown(const char* bytes, int32 numBytes)
 285 {
 286         switch (bytes[0]) {
 287                 // arrow keys
 288
 289                 case B_LEFT_ARROW:
 290                 case '4':
 291                         if (Corner() == UP_RIGHT_CORNER)
 292                                 SetCorner(UP_LEFT_CORNER);
 293                         else if (Corner() == DOWN_RIGHT_CORNER)
 294                                 SetCorner(DOWN_LEFT_CORNER);
 295                         break;
 296                 case B_RIGHT_ARROW:
 297                 case '6':
 298                         if (Corner() == UP_LEFT_CORNER)
 299                                 SetCorner(UP_RIGHT_CORNER);
 300                         else if (Corner() == DOWN_LEFT_CORNER)
 301                                 SetCorner(DOWN_RIGHT_CORNER);
 302                         break;
 303                 case B_UP_ARROW:
 304                 case '8':
 305                         if (Corner() == DOWN_LEFT_CORNER)
 306                                 SetCorner(UP_LEFT_CORNER);
 307                         else if (Corner() == DOWN_RIGHT_CORNER)
 308                                 SetCorner(UP_RIGHT_CORNER);
 309                         break;
 310                 case B_DOWN_ARROW:
 311                 case '2':
 312                         if (Corner() == UP_LEFT_CORNER)
 313                                 SetCorner(DOWN_LEFT_CORNER);
 314                         else if (Corner() == UP_RIGHT_CORNER)
 315                                 SetCorner(DOWN_RIGHT_CORNER);
 316                         break;
 317
 318                 // numlock keys
 319
 320                 case B_HOME:
 321                 case '7':
 322                         SetCorner(UP_LEFT_CORNER);
 323                         break;
 324                 case B_PAGE_UP:
 325                 case '9':
 326                         SetCorner(UP_RIGHT_CORNER);
 327                         break;
 328                 case B_PAGE_DOWN:
 329                 case '3':
 330                         SetCorner(DOWN_RIGHT_CORNER);
 331                         break;
 332                 case B_END:
 333                 case '1':
 334                         SetCorner(DOWN_LEFT_CORNER);
 335                         break;
 336
 337                 default:
 338                         BControl::KeyDown(bytes, numBytes);
 339         }
 340 }
 341