aspectbin.c

   1 #include <stdio.h>
   2 #include "aspectbin.h"
   3
   4 static void aspect_bin_size_request(GtkWidget *, GtkRequisition *);
   5 static void aspect_bin_size_allocate(GtkWidget *, GtkAllocation *);
   6 static void aspect_bin_remove(GtkContainer *, GtkWidget *);
   7 static void aspect_bin_forall(GtkContainer *, gboolean, GtkCallback, gpointer);
   8
   9 G_DEFINE_TYPE(AspectBin, aspect_bin, GTK_TYPE_CONTAINER)
  10
  11 static void aspect_bin_init(AspectBin *abin)
  12 {
  13         GTK_WIDGET_SET_FLAGS(abin, GTK_NO_WINDOW);
  14
  15         abin->body      = NULL;
  16         abin->side      = NULL;
  17         abin->ratio     = 1;
  18         abin->align     = 0;
  19         abin->constrain = FALSE;
  20 }
  21
  22 static void aspect_bin_class_init(AspectBinClass *class)
  23 {
  24         GtkWidgetClass    *widget_class    = GTK_WIDGET_CLASS(class);
  25         GtkContainerClass *container_class = GTK_CONTAINER_CLASS(class);
  26
  27         widget_class->size_request  = aspect_bin_size_request;
  28         widget_class->size_allocate = aspect_bin_size_allocate;
  29
  30         container_class->remove = aspect_bin_remove;
  31         container_class->forall = aspect_bin_forall;
  32 }
  33
  34 GtkWidget *aspect_bin_new(void)
  35 {
  36         return GTK_WIDGET(g_object_new(ASPECT_BIN_TYPE, NULL));
  37 }
  38
  39 static void aspect_bin_remove(GtkContainer *container, GtkWidget *child)
  40 {
  41         AspectBin *abin = ASPECT_BIN(container);
  42
  43         if (abin->body == child) {
  44                 aspect_bin_set_body(abin, NULL, 1);
  45         } else if (abin->side == child) {
  46                 aspect_bin_set_side(abin, NULL);
  47         }
  48 }
  49
  50 static void aspect_bin_forall(GtkContainer *container,
  51                               gboolean      include_internals,
  52                               GtkCallback   callback,
  53                               gpointer      callback_data)
  54 {
  55         AspectBin *abin = ASPECT_BIN(container);
  56         g_return_if_fail(callback != NULL);
  57
  58         if (abin->body)
  59                 callback(abin->body, callback_data);
  60         if (abin->side)
  61                 callback(abin->side, callback_data);
  62 }
  63
  64 static void
  65 aspect_bin_size_request(GtkWidget *widget, GtkRequisition *requisition)
  66 {
  67         AspectBin *abin = ASPECT_BIN(widget);
  68         GtkRequisition creq = {0}, areq = {0};
  69
  70         if (abin->side && GTK_WIDGET_VISIBLE(abin->side)) {
  71                 gtk_widget_size_request(abin->side, &creq);
  72         }
  73
  74         if (abin->body && GTK_WIDGET_VISIBLE(abin->body)) {
  75                 int wtmp, htmp;
  76                 gtk_widget_size_request(abin->body, &areq);
  77                 wtmp = areq.height * abin->ratio + 0.5;
  78                 htmp = areq.width  / abin->ratio + 0.5;
  79
  80                 if (wtmp > areq.width) {
  81                         areq.width  = wtmp;
  82                 } else {
  83                         areq.height = htmp;
  84                 }
  85         }
  86
  87         requisition->width  = areq.width + creq.width;
  88         requisition->height = MAX(areq.height, creq.height);
  89 }
  90
  91 static void
  92 aspect_bin_size_allocate(GtkWidget *widget, GtkAllocation *allocation)
  93 {
  94         AspectBin *abin = ASPECT_BIN(widget);
  95         GtkRequisition creq = {0};
  96         GtkAllocation csize = {0}, asize = {0};
  97
  98         /* First find the best fit for the body. */
  99         if (abin->body && GTK_WIDGET_VISIBLE(abin->body)) {
 100                 asize.height = allocation->height;
 101                 asize.width  = asize.height * abin->ratio + 0.5;
 102
 103                 if (asize.width > allocation->width) {
 104                         asize.width  = allocation->width;
 105                         asize.height = asize.width / abin->ratio + 0.5;
 106                 }
 107         }
 108
 109         /* Now try to fit the side. */
 110         if (abin->side && GTK_WIDGET_VISIBLE(abin->side)) {
 111                 gtk_widget_get_child_requisition(abin->side, &creq);
 112
 113                 if (allocation->width - asize.width < creq.width) {
 114                         /* It didn't fit, squish the constrained guy. */
 115                         asize.width  = allocation->width - creq.width;
 116                         asize.height = asize.width / abin->ratio + 0.5;
 117                 }
 118
 119                 csize.width  = allocation->width - asize.width;
 120                 csize.height = MIN(allocation->height, creq.height);
 121                 if (abin->constrain) {
 122                         csize.height = MAX(csize.height, asize.height);
 123                 }
 124                 csize.x = asize.width;
 125         }
 126
 127         csize.y = (allocation->height - csize.height) * abin->align + 0.5;
 128         asize.y = (allocation->height - asize.height) * abin->align + 0.5;
 129
 130         if (abin->body)
 131                 gtk_widget_size_allocate(abin->body, &asize);
 132         if (abin->side)
 133                 gtk_widget_size_allocate(abin->side, &csize);
 134 }
 135
 136 static gboolean
 137 set_widget(GtkWidget **dest, GtkWidget *parent, GtkWidget *widget)
 138 {
 139         gboolean need_resize = FALSE;
 140
 141         if (*dest == widget)
 142                 return FALSE;
 143
 144         if (*dest) {
 145                 need_resize |= GTK_WIDGET_VISIBLE(*dest);
 146                 gtk_widget_unparent(*dest);
 147         }
 148
 149         *dest = widget;
 150         if (widget) {
 151                 gtk_widget_set_parent(widget, parent);
 152                 need_resize |= GTK_WIDGET_VISIBLE(widget);
 153         }
 154
 155         return GTK_WIDGET_VISIBLE(parent) && need_resize;
 156 }
 157
 158 void aspect_bin_set_body(AspectBin *abin, GtkWidget *widget, gfloat ratio)
 159 {
 160         g_return_if_fail(IS_ASPECT_BIN(abin));
 161         g_return_if_fail(widget == NULL || GTK_IS_WIDGET(widget));
 162         g_return_if_fail(widget == NULL || widget->parent == NULL);
 163
 164         if (set_widget(&abin->body, GTK_WIDGET(abin), widget))
 165                 gtk_widget_queue_resize(GTK_WIDGET(abin));
 166 }
 167
 168 void aspect_bin_set_side(AspectBin *abin, GtkWidget *widget)
 169 {
 170         g_return_if_fail(IS_ASPECT_BIN(abin));
 171         g_return_if_fail(widget == NULL || GTK_IS_WIDGET(widget));
 172         g_return_if_fail(widget == NULL || widget->parent == NULL);
 173
 174         if (set_widget(&abin->side, GTK_WIDGET(abin), widget))
 175                 gtk_widget_queue_resize(GTK_WIDGET(abin));
 176 }