WINGs/wbox.c

   1
   2 #include "WINGsP.h"
   3
   4 typedef struct {
   5         WMView *view;
   6         int minSize;
   7         int maxSize;
   8         int space;
   9         unsigned expand:1;
  10         unsigned fill:1;
  11         unsigned end:1;
  12 } SubviewItem;
  13
  14 typedef struct W_Box {
  15         W_Class widgetClass;
  16         W_View *view;
  17
  18         WMArray *subviews;
  19
  20         short borderWidth;
  21
  22         unsigned horizontal:1;
  23 } Box;
  24
  25 #define DEFAULT_WIDTH           40
  26 #define DEFAULT_HEIGHT          40
  27
  28 static void destroyBox(Box * bPtr);
  29
  30 static void handleEvents(XEvent * event, void *data);
  31
  32 static void didResize(struct W_ViewDelegate *, WMView *);
  33
  34 static W_ViewDelegate delegate = {
  35         NULL,
  36         NULL,
  37         didResize,
  38         NULL,
  39         NULL
  40 };
  41
  42 WMBox *WMCreateBox(WMWidget * parent)
  43 {
  44         Box *bPtr;
  45
  46         bPtr = wmalloc(sizeof(Box));
  47         memset(bPtr, 0, sizeof(Box));
  48
  49         bPtr->widgetClass = WC_Box;
  50
  51         bPtr->view = W_CreateView(W_VIEW(parent));
  52         if (!bPtr->view) {
  53                 wfree(bPtr);
  54                 return NULL;
  55         }
  56         bPtr->view->self = bPtr;
  57
  58         bPtr->view->delegate = &delegate;
  59
  60         bPtr->subviews = WMCreateArrayWithDestructor(2, wfree);
  61
  62         WMCreateEventHandler(bPtr->view, StructureNotifyMask, handleEvents, bPtr);
  63
  64         WMResizeWidget(bPtr, DEFAULT_WIDTH, DEFAULT_HEIGHT);
  65
  66         return bPtr;
  67 }
  68
  69 typedef struct {
  70         WMBox *box;
  71         int total;
  72         int expands;
  73         int x, y;
  74         int xe, ye;
  75         int w, h;
  76 } BoxData;
  77
  78 static void computeExpansion(void *object, void *cdata)
  79 {
  80         SubviewItem *item = (SubviewItem *) object;
  81         BoxData *eData = (BoxData *) cdata;
  82
  83         eData->total -= item->minSize;
  84         eData->total -= item->space;
  85         if (item->expand) {
  86                 eData->expands++;
  87         }
  88 }
  89
  90 static void doRearrange(void *object, void *cdata)
  91 {
  92         SubviewItem *item = (SubviewItem *) object;
  93         BoxData *eData = (BoxData *) cdata;
  94
  95         if (eData->box->horizontal) {
  96                 eData->w = item->minSize;
  97                 if (item->expand)
  98                         eData->w += eData->total / eData->expands;
  99         } else {
 100                 eData->h = item->minSize;
 101                 if (item->expand)
 102                         eData->h += eData->total / eData->expands;
 103         }
 104         if (!item->end) {
 105                 W_MoveView(item->view, eData->x, eData->y);
 106         }
 107         W_ResizeView(item->view, eData->w, eData->h);
 108         if (eData->box->horizontal) {
 109                 if (item->end)
 110                         eData->xe -= eData->w + item->space;
 111                 else
 112                         eData->x += eData->w + item->space;
 113         } else {
 114                 if (item->end)
 115                         eData->ye -= eData->h + item->space;
 116                 else
 117                         eData->y += eData->h + item->space;
 118         }
 119         if (item->end) {
 120                 W_MoveView(item->view, eData->xe, eData->ye);
 121         }
 122 }
 123
 124 static void rearrange(WMBox * box)
 125 {
 126         BoxData eData;
 127
 128         eData.box = box;
 129         eData.x = eData.y = box->borderWidth;
 130         eData.w = eData.h = 1;
 131         eData.expands = 0;
 132
 133         if (box->horizontal) {
 134                 eData.ye = box->borderWidth;
 135                 eData.xe = WMWidgetWidth(box) - box->borderWidth;
 136                 eData.h = WMWidgetHeight(box) - 2 * box->borderWidth;
 137                 eData.total = WMWidgetWidth(box) - 2 * box->borderWidth;
 138         } else {
 139                 eData.xe = box->borderWidth;
 140                 eData.ye = WMWidgetHeight(box) - box->borderWidth;
 141                 eData.w = WMWidgetWidth(box) - 2 * box->borderWidth;
 142                 eData.total = WMWidgetHeight(box) - 2 * box->borderWidth;
 143         }
 144
 145         if (eData.w <= 0 || eData.h <= 0 || eData.total <= 0) {
 146                 return;
 147         }
 148
 149         WMMapArray(box->subviews, computeExpansion, &eData);
 150         WMMapArray(box->subviews, doRearrange, &eData);
 151 }
 152
 153 void WMSetBoxBorderWidth(WMBox * box, unsigned width)
 154 {
 155         if (box->borderWidth != width) {
 156                 box->borderWidth = width;
 157                 rearrange(box);
 158         }
 159 }
 160
 161 void WMAddBoxSubview(WMBox * bPtr, WMView * view, Bool expand, Bool fill, int minSize, int maxSize, int space)
 162 {
 163         SubviewItem *subView;
 164
 165         subView = wmalloc(sizeof(SubviewItem));
 166         subView->view = view;
 167         subView->minSize = minSize;
 168         subView->maxSize = maxSize;
 169         subView->expand = expand;
 170         subView->fill = fill;
 171         subView->space = space;
 172         subView->end = 0;
 173
 174         WMAddToArray(bPtr->subviews, subView);
 175
 176         rearrange(bPtr);
 177 }
 178
 179 void WMAddBoxSubviewAtEnd(WMBox * bPtr, WMView * view, Bool expand, Bool fill, int minSize, int maxSize, int space)
 180 {
 181         SubviewItem *subView;
 182
 183         subView = wmalloc(sizeof(SubviewItem));
 184         subView->view = view;
 185         subView->minSize = minSize;
 186         subView->maxSize = maxSize;
 187         subView->expand = expand;
 188         subView->fill = fill;
 189         subView->space = space;
 190         subView->end = 1;
 191
 192         WMAddToArray(bPtr->subviews, subView);
 193
 194         rearrange(bPtr);
 195 }
 196
 197 static int matchView(void *item, void *cdata)
 198 {
 199         return (((SubviewItem *) item)->view == (WMView *) cdata);
 200 }
 201
 202 void WMRemoveBoxSubview(WMBox * bPtr, WMView * view)
 203 {
 204         if (WMRemoveFromArrayMatching(bPtr->subviews, matchView, view)) {
 205                 rearrange(bPtr);
 206         }
 207 }
 208
 209 void WMSetBoxHorizontal(WMBox * box, Bool flag)
 210 {
 211         /* make sure flag is either 0 or 1 no matter what true value was passed */
 212         flag = ((flag == 0) ? 0 : 1);
 213         if (box->horizontal != flag) {
 214                 box->horizontal = flag;
 215                 rearrange(box);
 216         }
 217 }
 218
 219 static void destroyBox(Box * bPtr)
 220 {
 221         WMFreeArray(bPtr->subviews);
 222         wfree(bPtr);
 223 }
 224
 225 static void didResize(struct W_ViewDelegate *delegate, WMView * view)
 226 {
 227         rearrange(view->self);
 228 }
 229
 230 static void handleEvents(XEvent * event, void *data)
 231 {
 232         Box *bPtr = (Box *) data;
 233
 234         CHECK_CLASS(data, WC_Box);
 235
 236         switch (event->type) {
 237         case DestroyNotify:
 238                 destroyBox(bPtr);
 239                 break;
 240
 241         case ConfigureNotify:
 242                 rearrange(bPtr);
 243                 break;
 244         }
 245 }