WINGs/wbox.c

   1
   2
   3 #include "WINGsP.h"
   4
   5
   6 typedef struct {
   7     WMView *view;
   8     int minSize;
   9     int maxSize;
  10     int space;
  11     unsigned expand:1;
  12     unsigned fill:1;
  13     unsigned end:1;
  14 } SubviewItem;
  15
  16
  17 typedef struct W_Box {
  18     W_Class widgetClass;
  19     W_View *view;
  20
  21     SubviewItem *subviews;
  22     int subviewCount;
  23
  24     short borderWidth;
  25
  26     unsigned horizontal:1;
  27 } Box;
  28
  29
  30 #define DEFAULT_WIDTH           40
  31 #define DEFAULT_HEIGHT          40
  32
  33
  34
  35 static void destroyBox(Box *bPtr);
  36
  37 static void handleEvents(XEvent *event, void *data);
  38
  39 static void didResize(struct W_ViewDelegate*, WMView*);
  40
  41 static W_ViewDelegate delegate = {
  42     NULL,
  43         NULL,
  44         didResize,
  45         NULL,
  46         NULL
  47 };
  48
  49
  50
  51
  52 static void resizedParent(void *self, WMNotification *notif)
  53 {
  54     WMView *view = (WMView*)WMGetNotificationObject(notif);
  55     WMSize size = WMGetViewSize(view);
  56
  57     WMResizeWidget((WMWidget*)self, size.width, size.height);
  58 }
  59
  60
  61 WMBox*
  62 WMCreateBox(WMWidget *parent)
  63 {
  64     Box *bPtr;
  65
  66     bPtr = wmalloc(sizeof(Box));
  67     memset(bPtr, 0, sizeof(Box));
  68
  69     bPtr->widgetClass = WC_Box;
  70
  71     bPtr->view = W_CreateView(W_VIEW(parent));
  72     if (!bPtr->view) {
  73         wfree(bPtr);
  74         return NULL;
  75     }
  76     bPtr->view->self = bPtr;
  77
  78     bPtr->view->delegate = &delegate;
  79
  80     WMCreateEventHandler(bPtr->view, StructureNotifyMask,
  81                          handleEvents, bPtr);
  82
  83     WMResizeWidget(bPtr, DEFAULT_WIDTH, DEFAULT_HEIGHT);
  84
  85     bPtr->subviews = NULL;
  86     bPtr->subviewCount = 0;
  87
  88     return bPtr;
  89 }
  90
  91
  92 static void
  93 rearrange(WMBox *box)
  94 {
  95     int i;
  96     int x, y;
  97     int xe, ye;
  98     int w = 1, h = 1;
  99     int total;
 100     int expands = 0;
 101
 102     x = box->borderWidth;
 103     y = box->borderWidth;
 104
 105     if (box->horizontal) {
 106         ye = box->borderWidth;
 107         xe = WMWidgetWidth(box) - box->borderWidth;
 108         h = WMWidgetHeight(box) - 2 * box->borderWidth;
 109         total = WMWidgetWidth(box) - 2 * box->borderWidth;
 110     } else {
 111         xe = box->borderWidth;
 112         ye = WMWidgetHeight(box) - box->borderWidth;
 113         w = WMWidgetWidth(box) - 2 * box->borderWidth;
 114         total = WMWidgetHeight(box) - 2 * box->borderWidth;
 115     }
 116
 117     if (w <= 0 || h <= 0 || total <= 0) {
 118         return;
 119     }
 120
 121     for (i = 0; i < box->subviewCount; i++) {
 122         total -= box->subviews[i].minSize;
 123         total -= box->subviews[i].space;
 124         if (box->subviews[i].expand) {
 125             expands++;
 126         }
 127     }
 128
 129     for (i = 0; i < box->subviewCount; i++) {
 130         if (box->horizontal) {
 131             w = box->subviews[i].minSize;
 132             if (box->subviews[i].expand)
 133                 w += total/expands;
 134         } else {
 135             h = box->subviews[i].minSize;
 136             if (box->subviews[i].expand)
 137                 h += total/expands;
 138         }
 139         if (!box->subviews[i].end) {
 140             W_MoveView(box->subviews[i].view, x, y);
 141         }
 142         W_ResizeView(box->subviews[i].view, w, h);
 143         if (box->horizontal) {
 144             if (box->subviews[i].end)
 145                 xe -= w + box->subviews[i].space;
 146             else
 147                 x += w + box->subviews[i].space;
 148         } else {
 149             if (box->subviews[i].end)
 150                 ye -= h + box->subviews[i].space;
 151             else
 152                 y += h + box->subviews[i].space;
 153         }
 154         if (box->subviews[i].end) {
 155             W_MoveView(box->subviews[i].view, xe, ye);
 156         }
 157     }
 158 }
 159
 160
 161 void
 162 WMSetBoxBorderWidth(WMBox *box, unsigned width)
 163 {
 164     box->borderWidth = width;
 165
 166     rearrange(box);
 167 }
 168
 169
 170 void
 171 WMAddBoxSubview(WMBox *bPtr, WMView *view, Bool expand, Bool fill,
 172                 int minSize, int maxSize, int space)
 173 {
 174     int i = bPtr->subviewCount;
 175
 176     bPtr->subviewCount++;
 177     if (!bPtr->subviews)
 178         bPtr->subviews = wmalloc(sizeof(SubviewItem));
 179     else
 180         bPtr->subviews = wrealloc(bPtr->subviews,
 181                                   bPtr->subviewCount*sizeof(SubviewItem));
 182     bPtr->subviews[i].view = view;
 183     bPtr->subviews[i].minSize = minSize;
 184     bPtr->subviews[i].maxSize = maxSize;
 185     bPtr->subviews[i].expand = expand;
 186     bPtr->subviews[i].fill = fill;
 187     bPtr->subviews[i].space = space;
 188     bPtr->subviews[i].end = 0;
 189
 190     rearrange(bPtr);
 191 }
 192
 193
 194
 195 void
 196 WMAddBoxSubviewAtEnd(WMBox *bPtr, WMView *view, Bool expand, Bool fill,
 197                      int minSize, int maxSize, int space)
 198 {
 199     int i = bPtr->subviewCount;
 200
 201     bPtr->subviewCount++;
 202     if (!bPtr->subviews)
 203         bPtr->subviews = wmalloc(sizeof(SubviewItem));
 204     else
 205         bPtr->subviews = wrealloc(bPtr->subviews,
 206                                   bPtr->subviewCount*sizeof(SubviewItem));
 207     bPtr->subviews[i].view = view;
 208     bPtr->subviews[i].minSize = minSize;
 209     bPtr->subviews[i].maxSize = maxSize;
 210     bPtr->subviews[i].expand = expand;
 211     bPtr->subviews[i].fill = fill;
 212     bPtr->subviews[i].space = space;
 213     bPtr->subviews[i].end = 1;
 214
 215     rearrange(bPtr);
 216 }
 217
 218
 219 void
 220 WMRemoveBoxSubview(WMBox *bPtr, WMView *view)
 221 {
 222     int i;
 223
 224     for (i = 0; i < bPtr->subviewCount; i++) {
 225         if (bPtr->subviews[i].view == view) {
 226             memmove(&bPtr->subviews[i], &bPtr->subviews[i+1],
 227                     (bPtr->subviewCount - i - 1) * sizeof(void*));
 228             bPtr->subviewCount--;
 229             break;
 230         }
 231     }
 232     rearrange(bPtr);
 233 }
 234
 235
 236 void
 237 WMSetBoxHorizontal(WMBox *box, Bool flag)
 238 {
 239     box->horizontal = flag;
 240     rearrange(box);
 241 }
 242
 243
 244 void
 245 WMSetBoxExpandsToParent(WMBox *box)
 246 {
 247     WMSize size = W_VIEW(box)->parent->size;
 248
 249     WMAddNotificationObserver(resizedParent, box,
 250                               WMViewSizeDidChangeNotification,
 251                               W_VIEW(box)->parent);
 252     WMSetViewNotifySizeChanges(W_VIEW(box)->parent, True);
 253
 254     WMResizeWidget(box, size.width, size.height);
 255 }
 256
 257
 258 static void
 259 destroyBox(Box *bPtr)
 260 {
 261     WMRemoveNotificationObserver(bPtr);
 262     wfree(bPtr);
 263 }
 264
 265
 266 static void
 267 didResize(struct W_ViewDelegate *delegate, WMView *view)
 268 {
 269     rearrange(view->self);
 270 }
 271
 272
 273 static void
 274 handleEvents(XEvent *event, void *data)
 275 {
 276     Box *bPtr = (Box*)data;
 277
 278     CHECK_CLASS(data, WC_Box);
 279
 280     switch (event->type) {
 281      case DestroyNotify:
 282         destroyBox(bPtr);
 283         break;
 284
 285      case ConfigureNotify:
 286         rearrange(bPtr);
 287         break;
 288     }
 289 }
 290