forked from AuroraMiddleware/gtk
5080730728
Simplify all view model APIs and always return G_TYPE_OBJECT as the item-type for every model. It turns out nobody uses item-type anyway. So instead of adding lots of APIs, forcing people to think about it and trying to figure out how to handle filter or map models that modify item types, just having an easy life is a better approach. All the models need to be able to deal with any type of object going through anyway.
349 lines
11 KiB
C
349 lines
11 KiB
C
/* Copyright (C) 2019 Red Hat, Inc.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <gtk/gtk.h>
|
|
#include "constraint-view.h"
|
|
|
|
struct _ConstraintView
|
|
{
|
|
GtkWidget parent;
|
|
|
|
GListModel *model;
|
|
|
|
GtkWidget *drag_widget;
|
|
};
|
|
|
|
G_DEFINE_TYPE (ConstraintView, constraint_view, GTK_TYPE_WIDGET);
|
|
|
|
static void
|
|
constraint_view_dispose (GObject *object)
|
|
{
|
|
ConstraintView *view = CONSTRAINT_VIEW (object);
|
|
GtkWidget *child;
|
|
|
|
while ((child = gtk_widget_get_first_child (GTK_WIDGET (view))) != NULL)
|
|
gtk_widget_unparent (child);
|
|
|
|
g_clear_object (&view->model);
|
|
|
|
G_OBJECT_CLASS (constraint_view_parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
constraint_view_class_init (ConstraintViewClass *klass)
|
|
{
|
|
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
|
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
|
|
|
|
object_class->dispose = constraint_view_dispose;
|
|
|
|
gtk_widget_class_set_css_name (widget_class, "constraintview");
|
|
}
|
|
|
|
static void
|
|
update_weak_position (ConstraintView *self,
|
|
GtkWidget *child,
|
|
double x,
|
|
double y)
|
|
{
|
|
GtkLayoutManager *manager;
|
|
GtkConstraint *constraint;
|
|
|
|
manager = gtk_widget_get_layout_manager (GTK_WIDGET (self));
|
|
constraint = (GtkConstraint *)g_object_get_data (G_OBJECT (child), "x-constraint");
|
|
if (constraint)
|
|
{
|
|
gtk_constraint_layout_remove_constraint (GTK_CONSTRAINT_LAYOUT (manager),
|
|
constraint);
|
|
g_object_set_data (G_OBJECT (child), "x-constraint", NULL);
|
|
}
|
|
if (x != -100)
|
|
{
|
|
constraint = gtk_constraint_new_constant (child,
|
|
GTK_CONSTRAINT_ATTRIBUTE_CENTER_X,
|
|
GTK_CONSTRAINT_RELATION_EQ,
|
|
x,
|
|
GTK_CONSTRAINT_STRENGTH_WEAK);
|
|
g_object_set_data (G_OBJECT (constraint), "internal", (char *)"yes");
|
|
gtk_constraint_layout_add_constraint (GTK_CONSTRAINT_LAYOUT (manager),
|
|
constraint);
|
|
g_object_set_data (G_OBJECT (child), "x-constraint", constraint);
|
|
}
|
|
|
|
constraint = (GtkConstraint *)g_object_get_data (G_OBJECT (child), "y-constraint");
|
|
if (constraint)
|
|
{
|
|
gtk_constraint_layout_remove_constraint (GTK_CONSTRAINT_LAYOUT (manager),
|
|
constraint);
|
|
g_object_set_data (G_OBJECT (child), "y-constraint", NULL);
|
|
}
|
|
if (y != -100)
|
|
{
|
|
constraint = gtk_constraint_new_constant (child,
|
|
GTK_CONSTRAINT_ATTRIBUTE_CENTER_Y,
|
|
GTK_CONSTRAINT_RELATION_EQ,
|
|
y,
|
|
GTK_CONSTRAINT_STRENGTH_WEAK);
|
|
g_object_set_data (G_OBJECT (constraint), "internal", (char *)"yes");
|
|
gtk_constraint_layout_add_constraint (GTK_CONSTRAINT_LAYOUT (manager),
|
|
constraint);
|
|
g_object_set_data (G_OBJECT (child), "y-constraint", constraint);
|
|
}
|
|
}
|
|
|
|
static void
|
|
drag_begin (GtkGestureDrag *drag,
|
|
double start_x,
|
|
double start_y,
|
|
ConstraintView *self)
|
|
{
|
|
GtkWidget *widget;
|
|
|
|
widget = gtk_widget_pick (GTK_WIDGET (self), start_x, start_y, GTK_PICK_DEFAULT);
|
|
|
|
if (GTK_IS_LABEL (widget))
|
|
{
|
|
widget = gtk_widget_get_ancestor (widget, GTK_TYPE_FRAME);
|
|
if (widget &&
|
|
gtk_widget_get_parent (widget) == (GtkWidget *)self)
|
|
{
|
|
self->drag_widget = widget;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
drag_update (GtkGestureDrag *drag,
|
|
double offset_x,
|
|
double offset_y,
|
|
ConstraintView *self)
|
|
{
|
|
double x, y;
|
|
|
|
if (!self->drag_widget)
|
|
return;
|
|
|
|
gtk_gesture_drag_get_start_point (drag, &x, &y);
|
|
update_weak_position (self, self->drag_widget, x + offset_x, y + offset_y);
|
|
}
|
|
|
|
static void
|
|
drag_end (GtkGestureDrag *drag,
|
|
double offset_x,
|
|
double offset_y,
|
|
ConstraintView *self)
|
|
{
|
|
self->drag_widget = NULL;
|
|
}
|
|
|
|
static gboolean
|
|
omit_internal (gpointer item, gpointer user_data)
|
|
{
|
|
if (g_object_get_data (G_OBJECT (item), "internal"))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
constraint_view_init (ConstraintView *self)
|
|
{
|
|
GtkLayoutManager *manager;
|
|
GtkEventController *controller;
|
|
GListStore *list;
|
|
GListModel *all_children;
|
|
GListModel *all_constraints;
|
|
GListModel *guides;
|
|
GListModel *children;
|
|
GListModel *constraints;
|
|
GtkFilter *filter;
|
|
|
|
manager = gtk_constraint_layout_new ();
|
|
gtk_widget_set_layout_manager (GTK_WIDGET (self), manager);
|
|
|
|
all_children = gtk_widget_observe_children (GTK_WIDGET (self));
|
|
all_constraints = gtk_constraint_layout_observe_constraints (GTK_CONSTRAINT_LAYOUT (manager));
|
|
guides = gtk_constraint_layout_observe_guides (GTK_CONSTRAINT_LAYOUT (manager));
|
|
filter = gtk_custom_filter_new (omit_internal, NULL, NULL);
|
|
constraints = (GListModel *)gtk_filter_list_model_new (all_constraints, filter);
|
|
g_object_unref (filter);
|
|
filter = gtk_custom_filter_new (omit_internal, NULL, NULL);
|
|
children = (GListModel *)gtk_filter_list_model_new (all_children, filter);
|
|
g_object_unref (filter);
|
|
|
|
list = g_list_store_new (G_TYPE_LIST_MODEL);
|
|
g_list_store_append (list, children);
|
|
g_list_store_append (list, guides);
|
|
g_list_store_append (list, constraints);
|
|
self->model = G_LIST_MODEL (gtk_flatten_list_model_new (G_LIST_MODEL (list)));
|
|
g_object_unref (children);
|
|
g_object_unref (guides);
|
|
g_object_unref (constraints);
|
|
g_object_unref (all_children);
|
|
g_object_unref (all_constraints);
|
|
g_object_unref (list);
|
|
|
|
|
|
controller = (GtkEventController *)gtk_gesture_drag_new ();
|
|
g_signal_connect (controller, "drag-begin", G_CALLBACK (drag_begin), self);
|
|
g_signal_connect (controller, "drag-update", G_CALLBACK (drag_update), self);
|
|
g_signal_connect (controller, "drag-end", G_CALLBACK (drag_end), self);
|
|
gtk_widget_add_controller (GTK_WIDGET (self), controller);
|
|
}
|
|
|
|
ConstraintView *
|
|
constraint_view_new (void)
|
|
{
|
|
return g_object_new (CONSTRAINT_VIEW_TYPE, NULL);
|
|
}
|
|
|
|
void
|
|
constraint_view_add_child (ConstraintView *view,
|
|
const char *name)
|
|
{
|
|
GtkWidget *frame;
|
|
GtkWidget *label;
|
|
|
|
label = gtk_label_new (name);
|
|
frame = gtk_frame_new (NULL);
|
|
gtk_widget_add_css_class (frame, "child");
|
|
gtk_widget_set_name (frame, name);
|
|
gtk_frame_set_child (GTK_FRAME (frame), label);
|
|
gtk_widget_set_parent (frame, GTK_WIDGET (view));
|
|
|
|
update_weak_position (view, frame, 100, 100);
|
|
}
|
|
|
|
void
|
|
constraint_view_remove_child (ConstraintView *view,
|
|
GtkWidget *child)
|
|
{
|
|
update_weak_position (view, child, -100, -100);
|
|
gtk_widget_unparent (child);
|
|
}
|
|
|
|
void
|
|
constraint_view_add_guide (ConstraintView *view,
|
|
GtkConstraintGuide *guide)
|
|
{
|
|
GtkConstraintLayout *layout;
|
|
GtkWidget *frame;
|
|
GtkWidget *label;
|
|
const char *name;
|
|
GtkConstraint *constraint;
|
|
struct {
|
|
const char *name;
|
|
GtkConstraintAttribute attr;
|
|
} names[] = {
|
|
{ "left-constraint", GTK_CONSTRAINT_ATTRIBUTE_LEFT },
|
|
{ "top-constraint", GTK_CONSTRAINT_ATTRIBUTE_TOP },
|
|
{ "width-constraint", GTK_CONSTRAINT_ATTRIBUTE_WIDTH },
|
|
{ "height-constraint", GTK_CONSTRAINT_ATTRIBUTE_HEIGHT },
|
|
};
|
|
int i;
|
|
|
|
name = gtk_constraint_guide_get_name (guide);
|
|
label = gtk_label_new (name);
|
|
g_object_bind_property (guide, "name",
|
|
label, "label",
|
|
G_BINDING_DEFAULT);
|
|
|
|
frame = gtk_frame_new (NULL);
|
|
gtk_widget_add_css_class (frame, "guide");
|
|
g_object_set_data (G_OBJECT (frame), "internal", (char *)"yes");
|
|
gtk_frame_set_child (GTK_FRAME (frame), label);
|
|
gtk_widget_insert_after (frame, GTK_WIDGET (view), NULL);
|
|
|
|
g_object_set_data (G_OBJECT (guide), "frame", frame);
|
|
|
|
layout = GTK_CONSTRAINT_LAYOUT (gtk_widget_get_layout_manager (GTK_WIDGET (view)));
|
|
gtk_constraint_layout_add_guide (layout, g_object_ref (guide));
|
|
|
|
for (i = 0; i < G_N_ELEMENTS (names); i++)
|
|
{
|
|
constraint = gtk_constraint_new (frame,
|
|
names[i].attr,
|
|
GTK_CONSTRAINT_RELATION_EQ,
|
|
guide,
|
|
names[i].attr,
|
|
1.0, 0.0,
|
|
GTK_CONSTRAINT_STRENGTH_REQUIRED);
|
|
g_object_set_data (G_OBJECT (constraint), "internal", (char *)"yes");
|
|
gtk_constraint_layout_add_constraint (layout, constraint);
|
|
g_object_set_data (G_OBJECT (guide), names[i].name, constraint);
|
|
}
|
|
|
|
update_weak_position (view, frame, 150, 150);
|
|
}
|
|
|
|
void
|
|
constraint_view_remove_guide (ConstraintView *view,
|
|
GtkConstraintGuide *guide)
|
|
{
|
|
GtkConstraintLayout *layout;
|
|
GtkWidget *frame;
|
|
GtkConstraint *constraint;
|
|
const char *names[] = {
|
|
"left-constraint",
|
|
"top-constraint",
|
|
"width-constraint",
|
|
"height-constraint"
|
|
};
|
|
int i;
|
|
|
|
layout = GTK_CONSTRAINT_LAYOUT (gtk_widget_get_layout_manager (GTK_WIDGET (view)));
|
|
|
|
for (i = 0; i < G_N_ELEMENTS (names); i++)
|
|
{
|
|
constraint = (GtkConstraint*)g_object_get_data (G_OBJECT (guide), names[i]);
|
|
gtk_constraint_layout_remove_constraint (layout, constraint);
|
|
}
|
|
|
|
frame = (GtkWidget *)g_object_get_data (G_OBJECT (guide), "frame");
|
|
update_weak_position (view, frame, -100, -100);
|
|
gtk_widget_unparent (frame);
|
|
|
|
gtk_constraint_layout_remove_guide (layout, guide);
|
|
}
|
|
|
|
void
|
|
constraint_view_add_constraint (ConstraintView *view,
|
|
GtkConstraint *constraint)
|
|
{
|
|
GtkLayoutManager *manager;
|
|
|
|
manager = gtk_widget_get_layout_manager (GTK_WIDGET (view));
|
|
gtk_constraint_layout_add_constraint (GTK_CONSTRAINT_LAYOUT (manager),
|
|
g_object_ref (constraint));
|
|
}
|
|
|
|
void
|
|
constraint_view_remove_constraint (ConstraintView *view,
|
|
GtkConstraint *constraint)
|
|
{
|
|
GtkLayoutManager *manager;
|
|
|
|
manager = gtk_widget_get_layout_manager (GTK_WIDGET (view));
|
|
gtk_constraint_layout_remove_constraint (GTK_CONSTRAINT_LAYOUT (manager),
|
|
constraint);
|
|
}
|
|
|
|
GListModel *
|
|
constraint_view_get_model (ConstraintView *view)
|
|
{
|
|
return view->model;
|
|
}
|