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| #include "gtkform.h"
#include <setjmp.h>
#include <stdio.h>
const gint HEIGHT = 400;
const gint WIDTH = 200;
enum
{
STATE_RESET,
STATE_VISITED,
STATE_DONE
};
enum
{
CHILD_PROP_TOP_ATTACHMENT = 1,
CHILD_PROP_TOP_WIDGET,
CHILD_PROP_TOP_OFFSET,
CHILD_PROP_LEFT_ATTACHMENT,
CHILD_PROP_LEFT_WIDGET,
CHILD_PROP_LEFT_OFFSET,
CHILD_PROP_BOTTOM_ATTACHMENT,
CHILD_PROP_BOTTOM_WIDGET,
CHILD_PROP_BOTTOM_OFFSET,
CHILD_PROP_RIGHT_ATTACHMENT,
CHILD_PROP_RIGHT_WIDGET,
CHILD_PROP_RIGHT_OFFSET,
};
/* Private data structure */
struct _GtkFormPrivate
{
gint back_color;
gint normal_liquid_color;
gint alert_liquid_color;
gint trait_color;
gint air_color;
gint width;
gint threshold_low;
float jauge;
GdkWindow *window;
};
static void gtk_form_class_init (GtkFormClass *klass);
static void gtk_form_init (GtkForm *form);
static void gtk_form_finalize (GObject *object);
static void gtk_form_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_form_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_form_add (GtkContainer *container,
GtkWidget *widget);
static void gtk_form_remove (GtkContainer *container,
GtkWidget *widget);
static void gtk_form_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data);
static void gtk_form_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_form_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec);
static GType gtk_form_child_type (GtkContainer *container);
static void gtk_form_layout (GtkForm *form,
gint *my_bounds,
gboolean recompute_our_size);
static void gtk_form_layout_child (jmp_buf env,
GtkFormChild *fc,
gint *my_bounds,
gboolean recompute_our_size);
static gint gtk_form_layout_edge (jmp_buf env,
GtkFormChild *fc,
gint edge,
gint *my_bounds,
gboolean recompute_our_size);
static void gtk_form_move_edge (jmp_buf env,
GtkFormChild *fc,
int edge,
int where,
gint *my_bounds,
gboolean recompute);
static gboolean gtk_form_edge_should_move_too (GtkFormChild *fc,
gint edge);
static void gtk_form_get_preferred_height (GtkWidget *widget, gint *minimal_height, gint *natural_height);
static void gtk_form_get_preferred_width (GtkWidget *widget, gint *minimal_width, gint *natural_width);
static void gtk_form_realize(GtkWidget *widget);
static GtkContainerClass *parent_class = NULL;
/* define la variable GTK_TYPE_FORM contient la fonction de type Gtype de la class */
#define GTK_TYPE_FORM gtk_form_get_type()
/* Define type */
G_DEFINE_TYPE(GtkForm, gtk_form, GTK_TYPE_CONTAINER)
/** signification des paramètres pour G_DEFINE_TYPE(GtkForm, gtk_form, GTK_TYPE_CONTAINER)
* GtkForm est le type
* le même préfixe GtkForm que pour la classe GtkFormClass
* gtk_form sert l'implementation de la fonction (gtk_form)_get_type
* GTK_TYPE_WIDGET est le Gtype du widget parent define a parent class pointer accessible from the whole .c file
**/
static GType gtk_form_attachment_get_type(void)
{
static GType etype = 0;
if (etype == 0) {
static const GEnumValue values[] = {
{ GTK_FORM_ATTACH_NONE, "GTK_FORM_ATTACH_NONE", "none" },
{ GTK_FORM_ATTACH_FORM, "GTK_FORM_ATTACH_FORM", "form" },
{ GTK_FORM_ATTACH_WIDGET, "GTK_FORM_ATTACH_WIDGET", "widget" },
{ GTK_FORM_ATTACH_OPPOSITE_WIDGET, "GTK_FORM_ATTACH_OPPOSITE_WIDGET", "opposite_widget" },
{ GTK_FORM_ATTACH_CENTER, "GTK_FORM_ATTACH_CENTER", "center" },
{ GTK_FORM_ATTACH_SELF, "GTK_FORM_ATTACH_SELF", "self" },
{ 0, NULL, NULL }
};
etype = g_enum_register_static ("GtkFormAttachment", values);
}
return etype;
}
#define GTK_TYPE_FORM_ATTACHMENT (gtk_form_attachment_get_type())
static void gtk_form_class_init (GtkFormClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gtk_form_finalize;
widget_class->size_allocate = gtk_form_size_allocate;
widget_class->get_preferred_width = gtk_form_get_preferred_width;
widget_class->get_preferred_height = gtk_form_get_preferred_height;
widget_class->realize = gtk_form_realize;
container_class->add = gtk_form_add;
container_class->remove = gtk_form_remove;
container_class->forall = gtk_form_forall;
container_class->child_type = gtk_form_child_type;
container_class->set_child_property = gtk_form_set_child_property;
container_class->get_child_property = gtk_form_get_child_property;
gtk_container_class_install_child_property (container_class,
CHILD_PROP_TOP_ATTACHMENT,
g_param_spec_enum ("top_attachment",
"Top attachment",
"Type of attachment of top edge of child",
GTK_TYPE_FORM_ATTACHMENT, GTK_FORM_ATTACH_NONE,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_TOP_WIDGET,
g_param_spec_object ("top_widget",
"Top widget",
"Target widget for top edge of child",
GTK_TYPE_WIDGET,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_TOP_OFFSET,
g_param_spec_uint ("top_offset",
"Top offset",
"Offset from the target or form side",
0, G_MAXUINT, 0,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_LEFT_ATTACHMENT,
g_param_spec_enum ("left_attachment",
"Left attachment",
"Type of attachment of left edge of child",
GTK_TYPE_FORM_ATTACHMENT, GTK_FORM_ATTACH_NONE,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_LEFT_WIDGET,
g_param_spec_object ("left_widget",
"Left widget",
"Target widget for left edge of child",
GTK_TYPE_WIDGET,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_LEFT_OFFSET,
g_param_spec_uint ("left_offset",
"Left offset",
"Offset from the target or form side",
0, G_MAXUINT, 0,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_BOTTOM_ATTACHMENT,
g_param_spec_enum ("bottom_attachment",
"Bottom attachment",
"Type of attachment of bottom edge of child",
GTK_TYPE_FORM_ATTACHMENT, GTK_FORM_ATTACH_NONE,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_BOTTOM_WIDGET,
g_param_spec_object ("bottom_widget",
"Bottom widget",
"Target widget for bottom edge of child",
GTK_TYPE_WIDGET,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_BOTTOM_OFFSET,
g_param_spec_uint ("bottom_offset",
"Bottom offset",
"Offset from the target or form side",
0, G_MAXUINT, 0,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_RIGHT_ATTACHMENT,
g_param_spec_enum ("right_attachment",
"Right attachment",
"Type of attachment of right edge of child",
GTK_TYPE_FORM_ATTACHMENT, GTK_FORM_ATTACH_NONE,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_RIGHT_WIDGET,
g_param_spec_object ("right_widget",
"Right widget",
"Target widget for right edge of child",
GTK_TYPE_WIDGET,
G_PARAM_READWRITE));
gtk_container_class_install_child_property (container_class,
CHILD_PROP_RIGHT_OFFSET,
g_param_spec_uint ("right_offset",
"Right offset",
"Offset from the target or form side",
0, G_MAXUINT, 0,
G_PARAM_READWRITE));
}
static GType gtk_form_child_type (GtkContainer *container)
{
return GTK_TYPE_WIDGET;
}
static GtkFormChild *gtk_form_find_child (GtkForm *form, GtkWidget *widget)
{
GList *list;
for (list = form->children; list; list = list->next)
{
GtkFormChild *form_child = list->data;
if (form_child->widget == widget)
return form_child;
}
return NULL;
}
static void gtk_form_set_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkForm *form = GTK_FORM(container);
GtkFormChild *form_child;
form_child = gtk_form_find_child (form, child);
if (!form_child) {
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
return;
}
switch (property_id) {
case CHILD_PROP_TOP_ATTACHMENT:
form_child->constraints [GTK_FORM_EDGE_TOP].attachment = g_value_get_enum(value);
break;
case CHILD_PROP_TOP_WIDGET:
form_child->constraints [GTK_FORM_EDGE_TOP].child = gtk_form_find_child (form, GTK_WIDGET (g_value_get_object (value)));
break;
case CHILD_PROP_TOP_OFFSET:
form_child->constraints [GTK_FORM_EDGE_TOP].offset = g_value_get_uint(value);
break;
case CHILD_PROP_LEFT_ATTACHMENT:
form_child->constraints [GTK_FORM_EDGE_LEFT].attachment = g_value_get_enum(value);
break;
case CHILD_PROP_LEFT_WIDGET:
form_child->constraints [GTK_FORM_EDGE_LEFT].child = gtk_form_find_child (form, GTK_WIDGET (g_value_get_object (value)));
break;
case CHILD_PROP_LEFT_OFFSET:
form_child->constraints [GTK_FORM_EDGE_LEFT].offset = g_value_get_uint(value);
break;
case CHILD_PROP_BOTTOM_ATTACHMENT:
form_child->constraints [GTK_FORM_EDGE_BOTTOM].attachment = g_value_get_enum(value);
break;
case CHILD_PROP_BOTTOM_WIDGET:
form_child->constraints [GTK_FORM_EDGE_BOTTOM].child = gtk_form_find_child (form, GTK_WIDGET (g_value_get_object (value)));
break;
case CHILD_PROP_BOTTOM_OFFSET:
form_child->constraints [GTK_FORM_EDGE_BOTTOM].offset = g_value_get_uint(value);
break;
case CHILD_PROP_RIGHT_ATTACHMENT:
form_child->constraints [GTK_FORM_EDGE_RIGHT].attachment = g_value_get_enum(value);
break;
case CHILD_PROP_RIGHT_WIDGET:
form_child->constraints [GTK_FORM_EDGE_RIGHT].child = gtk_form_find_child (form, GTK_WIDGET (g_value_get_object (value)));
break;
case CHILD_PROP_RIGHT_OFFSET:
form_child->constraints [GTK_FORM_EDGE_RIGHT].offset = g_value_get_uint(value);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static void gtk_form_get_child_property (GtkContainer *container,
GtkWidget *child,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkForm *form = GTK_FORM(container);
GtkFormChild *form_child = gtk_form_find_child (form, child);
if (!form_child) {
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
return;
}
switch (property_id) {
case CHILD_PROP_TOP_ATTACHMENT:
g_value_set_enum (value, form_child->constraints[GTK_FORM_EDGE_TOP].attachment);
break;
case CHILD_PROP_TOP_WIDGET:
g_value_set_object (value,
form_child->constraints[GTK_FORM_EDGE_TOP].child ?
G_OBJECT(form_child->constraints[GTK_FORM_EDGE_TOP].child) : NULL);
break;
case CHILD_PROP_TOP_OFFSET:
g_value_set_uint(value, form_child->constraints[GTK_FORM_EDGE_TOP].offset);
break;
case CHILD_PROP_LEFT_ATTACHMENT:
g_value_set_enum (value, form_child->constraints[GTK_FORM_EDGE_LEFT].attachment);
break;
case CHILD_PROP_LEFT_WIDGET:
g_value_set_object (value,
form_child->constraints[GTK_FORM_EDGE_LEFT].child ?
G_OBJECT(form_child->constraints[GTK_FORM_EDGE_LEFT].child) : NULL);
break;
case CHILD_PROP_LEFT_OFFSET:
g_value_set_uint(value, form_child->constraints[GTK_FORM_EDGE_LEFT].offset);
break;
case CHILD_PROP_BOTTOM_ATTACHMENT:
g_value_set_enum (value, form_child->constraints[GTK_FORM_EDGE_BOTTOM].attachment);
break;
case CHILD_PROP_BOTTOM_WIDGET:
g_value_set_object (value,
form_child->constraints[GTK_FORM_EDGE_BOTTOM].child ?
G_OBJECT(form_child->constraints[GTK_FORM_EDGE_BOTTOM].child) : NULL);
break;
case CHILD_PROP_BOTTOM_OFFSET:
g_value_set_uint(value, form_child->constraints[GTK_FORM_EDGE_BOTTOM].offset);
break;
case CHILD_PROP_RIGHT_ATTACHMENT:
g_value_set_enum (value, form_child->constraints[GTK_FORM_EDGE_RIGHT].attachment);
break;
case CHILD_PROP_RIGHT_WIDGET:
g_value_set_object (value,
form_child->constraints[GTK_FORM_EDGE_RIGHT].child ?
G_OBJECT(form_child->constraints[GTK_FORM_EDGE_RIGHT].child) : NULL);
break;
case CHILD_PROP_RIGHT_OFFSET:
g_value_set_uint(value, form_child->constraints[GTK_FORM_EDGE_RIGHT].offset);
break;
default:
GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
break;
}
}
static void gtk_form_init (GtkForm *form)
{
#ifdef CB_TEST
g_print ("gtk_form_init\n");
#endif
GtkFormPrivate *priv = G_TYPE_INSTANCE_GET_PRIVATE(form, GTK_TYPE_FORM, GtkFormPrivate);
gtk_widget_set_has_window(GTK_WIDGET(form), TRUE);
form->priv = priv;
gtk_widget_set_has_window(GTK_WIDGET(form), FALSE);
gtk_widget_set_redraw_on_allocate (GTK_WIDGET (form), FALSE);
form->children = NULL;
}
GtkWidget* gtk_form_new ()
{
#ifdef CB_TEST
g_print ("instance gtk_form_new créé\n");
#endif
return GTK_WIDGET (g_object_new (GTK_TYPE_FORM, NULL));
}
void gtk_form_constrain (GtkForm *form,
GtkWidget *child,
GtkFormEdge edge,
GtkFormAttachment attachment,
GtkWidget *widget,
gint offset)
{
GtkFormChild *form_child;
g_return_if_fail (form != NULL);
g_return_if_fail (GTK_IS_FORM (form));
g_return_if_fail (child != NULL);
g_return_if_fail (GTK_IS_WIDGET (child));
form_child = gtk_form_find_child (form, child);
if (!form_child)
return;
#ifdef CB_TEST
g_print ("gtk_form_constrain en action \n");
#endif
form_child->constraints[edge].location = 0;
form_child->constraints[edge].attachment = attachment;
form_child->constraints[edge].offset = offset;
form_child->constraints[edge].child = gtk_form_find_child (form, widget);
// pourquoi un child (ex un button ) aurait-il automatiquement un parent ?
//if (gtk_widget_get_visible (child->parent) /* && GTK_WIDGET_VISIBLE (child) */ )
//{
//if (gtk_widget_get_mapped (child->parent))
//gtk_widget_map (child);
//gtk_widget_queue_resize (child);
//}
gtk_widget_map (child);
gtk_widget_queue_resize (child);
}
static void gtk_form_finalize (GObject *object)
{
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_FORM (object));
//GtkForm *form = GTK_FORM (object);
G_OBJECT_CLASS (parent_class)->finalize (object);
//G_OBJECT_CLASS (parent_class)->finalize (form);
}
static void gtk_form_size_request(GtkWidget *widget, GtkRequisition *requisition)
{
/** nous stockons la taille préférée de notre widget, cette fonction ne sert qu'a cela
* mais requisition sera par la suite consulté **/
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_FORM (widget));
g_return_if_fail (requisition != NULL);
#ifdef CB_TEST
g_print ("gtk_form_size_request\n");
#endif
requisition->width = WIDTH;
requisition->height = HEIGHT;
}
static void gtk_form_get_preferred_width (GtkWidget *widget, gint *minimal_width, gint *natural_width)
{
/** la fonction établit une largeur xxxxx **/
g_return_if_fail (widget != NULL);
#ifdef CB_TEST
g_print ("gtk_form_get_preferred_width\n");
#endif
GtkRequisition requisition;
GList *children;
GtkForm *form = GTK_FORM (widget);
gint my_bounds [4] = { 0, 0, 0, 0 };
gtk_form_size_request (widget, &requisition);
*minimal_width = *natural_width = requisition.width;
for (children = form->children; children; children = children->next)
{
GtkRequisition minimum_size;
GtkRequisition natural_size; // non utilisé ?
GtkFormChild *child = children->data;
gtk_widget_get_preferred_size (child->widget, &minimum_size, &natural_size);
child->constraints [GTK_FORM_EDGE_RIGHT].location =
child->constraints [GTK_FORM_EDGE_LEFT].location +
minimum_size.width - 1;
}
gtk_form_layout (form, my_bounds, 1);
requisition.width = my_bounds [GTK_FORM_EDGE_RIGHT] + 1;
requisition.width += gtk_container_get_border_width(GTK_CONTAINER (form)) * 2;
for (children = form->children; children; children = children->next)
{
GtkFormChild *child = children->data;
child->constraints [GTK_FORM_EDGE_LEFT].fraction =
(float)child->constraints [GTK_FORM_EDGE_LEFT].location /
(float)(my_bounds [GTK_FORM_EDGE_RIGHT]);
child->constraints [GTK_FORM_EDGE_RIGHT].fraction =
(float)child->constraints [GTK_FORM_EDGE_RIGHT].location /
(float)(my_bounds [GTK_FORM_EDGE_RIGHT]);
child->constraints [GTK_FORM_EDGE_TOP].fraction =
(float)child->constraints [GTK_FORM_EDGE_TOP].location /
(float)(my_bounds [GTK_FORM_EDGE_BOTTOM]);
child->constraints [GTK_FORM_EDGE_BOTTOM].fraction =
(float)child->constraints [GTK_FORM_EDGE_BOTTOM].location /
(float)(my_bounds [GTK_FORM_EDGE_BOTTOM]);
}
}
static void gtk_form_get_preferred_height (GtkWidget *widget, gint *minimal_height, gint *natural_height)
{
/** la fonction établit une hauteur xxxxx **/
g_return_if_fail (widget != NULL);
#ifdef CB_TEST
g_print ("gtk_form_get_preferred_height\n");
#endif
GtkRequisition requisition;
GList *children;
GtkForm *form = GTK_FORM (widget);
gint my_bounds [4] = { 0, 0, 0, 0 };
gtk_form_size_request (widget, &requisition);
*minimal_height = *natural_height = requisition.height;
for (children = form->children; children; children = children->next)
{
GtkRequisition minimum_size;
GtkRequisition natural_size; // non utilisé ?
GtkFormChild *child = children->data;
gtk_widget_get_preferred_size (child->widget, &minimum_size, &natural_size);
child->constraints [GTK_FORM_EDGE_BOTTOM].location =
child->constraints [GTK_FORM_EDGE_TOP].location +
minimum_size.height - 1;
}
gtk_form_layout (form, my_bounds, 1);
requisition.height = my_bounds [GTK_FORM_EDGE_BOTTOM] + 1;
requisition.height += gtk_container_get_border_width(GTK_CONTAINER (form)) * 2;
for (children = form->children; children; children = children->next)
{
GtkFormChild *child = children->data;
child->constraints [GTK_FORM_EDGE_LEFT].fraction =
(float)child->constraints [GTK_FORM_EDGE_LEFT].location /
(float)(my_bounds [GTK_FORM_EDGE_RIGHT]);
child->constraints [GTK_FORM_EDGE_RIGHT].fraction =
(float)child->constraints [GTK_FORM_EDGE_RIGHT].location /
(float)(my_bounds [GTK_FORM_EDGE_RIGHT]);
child->constraints [GTK_FORM_EDGE_TOP].fraction =
(float)child->constraints [GTK_FORM_EDGE_TOP].location /
(float)(my_bounds [GTK_FORM_EDGE_BOTTOM]);
child->constraints [GTK_FORM_EDGE_BOTTOM].fraction =
(float)child->constraints [GTK_FORM_EDGE_BOTTOM].location /
(float)(my_bounds [GTK_FORM_EDGE_BOTTOM]);
}
}
static void gtk_form_size_allocate (GtkWidget *widget, GtkAllocation *allocation)
{
GtkForm *form;
GList *children;
gint my_bounds [4];
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_FORM (widget));
g_return_if_fail (allocation != NULL);
#ifdef CB_TEST
g_print ("gtk_form_size_allocate en action \n");
#endif
gtk_widget_set_allocation(widget, allocation);
form = GTK_FORM (widget);
g_print(" gtk_form_size_allocate passe ici %d\n", __LINE__);
my_bounds [GTK_FORM_EDGE_TOP] = 0 ;
my_bounds [GTK_FORM_EDGE_LEFT] = 0 ;
my_bounds [GTK_FORM_EDGE_BOTTOM] = my_bounds [GTK_FORM_EDGE_TOP] +
allocation->height - 1 - 2*gtk_container_get_border_width(GTK_CONTAINER (form));
my_bounds [GTK_FORM_EDGE_RIGHT] = my_bounds [GTK_FORM_EDGE_LEFT] +
allocation->width - 1 - 2*gtk_container_get_border_width(GTK_CONTAINER (form));
gtk_form_layout (form, my_bounds, 0);
GtkAllocation allocation_form;
gtk_widget_get_allocation(GTK_WIDGET (form),&allocation_form);
g_print(" gtk_form_size_allocate passe ici %d\n", __LINE__);
for (children = form->children; children; children = children->next)
{
GtkFormChild *child = children->data;
GtkAllocation allocation;
g_print(" gtk_form_size_allocate passe ici %d\n", __LINE__);
allocation.x = child->constraints [GTK_FORM_EDGE_LEFT].location +
allocation_form.x + gtk_container_get_border_width(GTK_CONTAINER (form));
g_print(" gtk_form_size_allocate passe ici %d\n", __LINE__);
allocation.y = child->constraints [GTK_FORM_EDGE_TOP].location +
allocation_form.y + gtk_container_get_border_width(GTK_CONTAINER (form));
g_print(" gtk_form_size_allocate passe ici %d\n", __LINE__);
allocation.width = child->constraints [GTK_FORM_EDGE_RIGHT].location -
child->constraints [GTK_FORM_EDGE_LEFT].location + 1;
allocation.height = child->constraints [GTK_FORM_EDGE_BOTTOM].location -
child->constraints [GTK_FORM_EDGE_TOP].location + 1;
gtk_widget_size_allocate (child->widget, &allocation);
}
}
static void gtk_form_add (GtkContainer *container, GtkWidget *widget)
{
GtkForm *form;
GtkFormChild *form_child;
gint i;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_FORM (container));
g_return_if_fail (widget != NULL);
// ? g_return_if_fail (widget->parent == NULL);
#ifdef CB_TEST
g_print ("gtk_form_add en action \n");
#endif
form = GTK_FORM (container);
form_child = g_new (GtkFormChild, 1);
form_child->widget = widget;
for (i = 0; i < 4; i ++)
{
form_child->constraints[i].location = 0;
form_child->constraints[i].attachment = GTK_FORM_ATTACH_NONE;
form_child->constraints[i].offset = 0;
form_child->constraints[i].factor = i < 2 ? 1 : -1;
form_child->constraints[i].state = STATE_RESET;
form_child->constraints[i].child = NULL;
form_child->constraints[i].lower_container_relative = FALSE;
form_child->constraints[i].fraction = 1.0;
}
form->children = g_list_prepend (form->children, form_child);
gtk_widget_set_parent (widget, GTK_WIDGET (form));
}
static void gtk_form_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkForm *form;
GtkFormChild *child;
GList *children;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_FORM (container));
g_return_if_fail (widget != NULL);
form = GTK_FORM (container);
children = form->children;
while (children)
{
child = children->data;
children = children->next;
if (child->widget == widget)
{
gtk_widget_unparent (widget);
form->children = g_list_remove (form->children, child);
g_free (child);
if (gtk_widget_get_visible (GTK_WIDGET (container)))
gtk_widget_queue_resize (GTK_WIDGET (container));
break;
}
}
}
static void gtk_form_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
GtkForm *form;
GtkFormChild *child;
GList *children;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_FORM (container));
g_return_if_fail (callback != NULL);
form = GTK_FORM (container);
children = form->children;
while (children)
{
child = children->data;
children = children->next;
(* callback) (child->widget, callback_data);
}
}
static void gtk_form_layout (GtkForm *form, gint *my_bounds, gboolean recompute_our_size)
{
int count;
for (count = 0; count < 10000; )
{
GList *list;
gboolean it_worked = 1;
/** Reset the state of all edges. **/
for (list = form->children; list; list = list->next)
{
int edge;
GtkFormChild *form_child = list->data;
for (edge = 0; edge < 4; edge ++)
form_child->constraints [edge].state = STATE_RESET;
}
for (list = form->children; list; list = list->next)
{
GtkFormChild *form_child = list->data;
jmp_buf env;
if (setjmp (env) == 0)
gtk_form_layout_child (env, form_child, my_bounds,
recompute_our_size);
else
{
it_worked = 0;
count ++;
break;
}
}
if (it_worked)
break;
}
}
static void gtk_form_layout_child (jmp_buf env, GtkFormChild *fc, gint *my_bounds,
gboolean recompute_our_size)
{
gint edge;
for (edge = 0; edge < 4; edge ++)
gtk_form_layout_edge (env, fc, edge, my_bounds, recompute_our_size);
}
static gint gtk_form_layout_edge (jmp_buf env, GtkFormChild *fc, gint edge,
gint *my_bounds, gboolean recompute_our_size)
{
GtkFormConstraint *ec = &fc->constraints [edge];
if (ec->state != STATE_DONE)
{
if (ec->state == STATE_VISITED)
printf ("FormLayout.layout: Circular dependency!\n");
else
{
gint location = 0;
ec->state = STATE_VISITED;
/*
* At this point, we can do the work.
*/
switch (ec->attachment)
{
case GTK_FORM_ATTACH_SELF:
if ( !recompute_our_size ) {
location = (int)(my_bounds [edge] * ec->fraction);
break ;
}
/* if computing size fall through to NONE */
case GTK_FORM_ATTACH_NONE:
location = ec->location;
ec->offset = 0;
/*
* Edges that don't have attachmenta are now
* treated as if they were attached relative to the
* opposite edge. This lets us propagate the value
* for lower_container_relative. Since it is possible
* that the opposite edge depends on this edge, we
* need to catch the circular dependency first.
*/
if ( fc->constraints[edge^2].state != STATE_VISITED ) {
gtk_form_layout_edge(env, fc, edge^2, my_bounds,
recompute_our_size);
location = ec->location ;
}
ec->lower_container_relative =
fc->constraints[edge^2].lower_container_relative;
break;
case GTK_FORM_ATTACH_FORM:
location = my_bounds [edge];
ec->lower_container_relative =
edge == GTK_FORM_EDGE_BOTTOM ||
edge == GTK_FORM_EDGE_RIGHT ;
break;
case GTK_FORM_ATTACH_WIDGET:
location = ec->factor + /* This IS correct */
gtk_form_layout_edge (env, ec->child,
edge ^ 2, my_bounds,
recompute_our_size);
ec->lower_container_relative =
fc->constraints[edge^2].lower_container_relative;
break;
case GTK_FORM_ATTACH_OPPOSITE_WIDGET:
location = gtk_form_layout_edge (env, ec->child,
edge, my_bounds,
recompute_our_size);
ec->lower_container_relative =
fc->constraints[edge].lower_container_relative;
break;
case GTK_FORM_ATTACH_CENTER:
{
gint center;
gint size;
if (ec->child == NULL) /* Center on form */
{
center = (my_bounds [edge ^ 2] -
my_bounds [edge]) / 2;
if (center < 0) center = -center;
}
else
{
gint edge1;
gint edge2;
gint half;
gtk_form_layout_edge (env, ec->child,
edge ^ 2, my_bounds,
recompute_our_size);
gtk_form_layout_edge (env, ec->child,
edge, my_bounds,
recompute_our_size);
/* It might be tempting to use the return of
* gtk_form_layout_edge rather than the next 2 lines
* of code. Bad idea because the second call to
* gtk_form_layout_edge may move the first edge.
*/
edge1 = ec->child->constraints [edge^2].location;
edge2 = ec->child->constraints [edge].location;
half = (edge1 - edge2) / 2;
center = ec->child->constraints [edge].location +
half;
}
/* We depend on the opposite edge so lets lay him out
* first.
*/
gtk_form_layout_edge (env, fc, edge ^ 2, my_bounds,
recompute_our_size);
size = fc->constraints [edge ^ 2].location -
fc->constraints [edge].location + 1;
location = center - size / 2;
break;
}
default:
printf ("FormLayout: Unknown attachment type!\n");
}
location += ec->offset * ec->factor;
gtk_form_move_edge (env, fc, edge, location, my_bounds,
recompute_our_size && ec->lower_container_relative);
ec->state = STATE_DONE;
}
}
return fc->constraints [edge].location;
}
static void gtk_form_move_edge (jmp_buf env, GtkFormChild *fc, int edge, int where,
gint *my_bounds, gboolean recompute)
{
int diff = where - fc->constraints [edge].location;
int opposite_edge = edge ^ 2;
if (gtk_form_edge_should_move_too (fc, opposite_edge))
fc->constraints [opposite_edge].location += diff;
else
{
/* Special Case: If we are in "recompute" mode and we shrink
* because of this constraint, then we need to expand the form
* to accomodate us instead of shrinking the child.
*/
if (recompute)
{
int delta = diff * fc->constraints [opposite_edge].factor;
if (delta < 0)
{
if (edge == GTK_FORM_EDGE_TOP || edge == GTK_FORM_EDGE_BOTTOM)
my_bounds [GTK_FORM_EDGE_BOTTOM] += -delta;
else
my_bounds [GTK_FORM_EDGE_RIGHT] += -delta;
longjmp (env, 1);
}
}
}
fc->constraints [edge].location += diff;
}
static gboolean gtk_form_edge_should_move_too (GtkFormChild *fc, gint edge)
{
/* Should edge move if the opposite edge moves. e.g. If the LEFT
* edge moves 10 pixels, should the RIGHT edge move too?
*
* Simply stated, an edge can move if there are no constraints for
* that edge or the constraints for that edge are relative to itself
* (specifies a width) or the edge has not been layed out yet.
*/
int attachment = fc->constraints [edge].attachment;
return (attachment == GTK_FORM_ATTACH_NONE) ||
(fc->constraints [edge].state != STATE_DONE) ||
(attachment == GTK_FORM_ATTACH_WIDGET &&
fc->constraints [edge].child == fc);
}
static void gtk_form_realize(GtkWidget *widget)
{
/** cette fonction est au coeur du dispositif c'est ici que la fenêtre est créé
* avec les bonnes dimensions
* notamment la couche de dessin est préparé avec le contexte cairo
* et le format de dessin classique
**/
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_FORM (widget));
#ifdef CB_TEST
g_print ("gtkform_realize\n");
#endif
GtkFormPrivate *priv = GTK_FORM(widget)->priv;
GtkAllocation allocation;
GdkWindowAttr attrs;
guint attrs_mask;
gtk_widget_set_realized(widget, TRUE);
gtk_widget_get_allocation(widget, &allocation);
attrs.x = allocation.x;
attrs.y = allocation.y;
attrs.width = allocation.width;
attrs.height = allocation.height;
attrs.window_type = GDK_WINDOW_CHILD;
attrs.wclass = GDK_INPUT_OUTPUT;
attrs.event_mask = gtk_widget_get_events(widget) | GDK_EXPOSURE_MASK;
attrs_mask = GDK_WA_X | GDK_WA_Y;
priv->window = gdk_window_new(gtk_widget_get_parent_window(widget),
&attrs, attrs_mask);
gdk_window_set_user_data(priv->window, widget);
gtk_widget_set_window(widget, priv->window);
/**widget->style = gtk_style_attach(gtk_widget_get_style( widget ),
priv->window);
//gtk_style_set_background(widget->style, priv->window, GTK_STATE_NORMAL);**/
GtkStyleContext * context = gtk_style_context_new ();
cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 500,500);
cairo_t *cairo = cairo_create (surface);
gtk_render_background (context,
cairo,
allocation.x,
allocation.y,
allocation.width,
allocation.height);
} |
gtkform et contrainte
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