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gtk/demos/constraint-editor/constraint-editor-window.c
Benjamin Otte e2f730c0bf filedialog: Add gtk_file_dialog_set_initial_file() 
A shortcut for setting initial-folder and initial-name at the same time.

We can remove all arguments from the actual async calls this way.
2022-12-24 07:56:57 -05:00

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/*
* Copyright © 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 2.1 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/>.
*
* Authors: Matthias Clasen
*/
#include "config.h"
#include "constraint-editor-window.h"
#include "constraint-view.h"
#include "constraint-editor.h"
#include "guide-editor.h"
struct _ConstraintEditorWindow
{
GtkApplicationWindow parent_instance;
GtkWidget *paned;
GtkWidget *view;
GtkWidget *list;
};
G_DEFINE_TYPE(ConstraintEditorWindow, constraint_editor_window, GTK_TYPE_APPLICATION_WINDOW);
static GtkConstraintTarget *
find_target (GListModel *model,
GtkConstraintTarget *orig)
{
const char *name;
const char *model_name;
gpointer item;
int i;
if (orig == NULL)
return NULL;
if (GTK_IS_LABEL (orig))
name = gtk_label_get_label (GTK_LABEL (orig));
else if (GTK_IS_CONSTRAINT_GUIDE (orig))
name = gtk_constraint_guide_get_name (GTK_CONSTRAINT_GUIDE (orig));
else
{
g_warning ("Don't know how to handle %s targets", G_OBJECT_TYPE_NAME (orig));
return NULL;
}
for (i = 0; i < g_list_model_get_n_items (model); i++)
{
item = g_list_model_get_item (model, i);
g_object_unref (item);
if (GTK_IS_WIDGET (item))
model_name = gtk_widget_get_name (GTK_WIDGET (item));
else
model_name = gtk_constraint_guide_get_name (GTK_CONSTRAINT_GUIDE (item));
if (strcmp (name, model_name) == 0)
return GTK_CONSTRAINT_TARGET (item);
}
g_warning ("Failed to find target '%s'", name);
return NULL;
}
gboolean
constraint_editor_window_load (ConstraintEditorWindow *self,
GFile *file)
{
char *path;
GtkBuilder *builder;
GError *error = NULL;
GtkWidget *view;
GtkLayoutManager *layout;
GtkWidget *child;
const char *name;
gpointer item;
int i;
GListModel *list;
path = g_file_get_path (file);
builder = gtk_builder_new ();
if (!gtk_builder_add_from_file (builder, path, &error))
{
g_print ("Could not load %s: %s", path, error->message);
g_error_free (error);
g_free (path);
g_object_unref (builder);
return FALSE;
}
view = GTK_WIDGET (gtk_builder_get_object (builder, "view"));
if (!GTK_IS_BOX (view))
{
g_print ("Could not load %s: No GtkBox named 'view'", path);
g_free (path);
g_object_unref (builder);
return FALSE;
}
layout = gtk_widget_get_layout_manager (view);
if (!GTK_IS_CONSTRAINT_LAYOUT (layout))
{
g_print ("Could not load %s: Widget 'view' does not use GtkConstraintLayout", path);
g_free (path);
g_object_unref (builder);
return FALSE;
}
for (child = gtk_widget_get_first_child (view);
child;
child = gtk_widget_get_next_sibling (child))
{
if (!GTK_IS_LABEL (child))
{
g_print ("Skipping non-GtkLabel child\n");
continue;
}
name = gtk_label_get_label (GTK_LABEL (child));
constraint_view_add_child (CONSTRAINT_VIEW (self->view), name);
}
list = gtk_constraint_layout_observe_guides (GTK_CONSTRAINT_LAYOUT (layout));
for (i = 0; i < g_list_model_get_n_items (list); i++)
{
GtkConstraintGuide *guide, *clone;
int w, h;
item = g_list_model_get_item (list, i);
guide = GTK_CONSTRAINT_GUIDE (item);
/* need to clone here, to attach to the right targets */
clone = gtk_constraint_guide_new ();
gtk_constraint_guide_set_name (clone, gtk_constraint_guide_get_name (guide));
gtk_constraint_guide_set_strength (clone, gtk_constraint_guide_get_strength (guide));
gtk_constraint_guide_get_min_size (guide, &w, &h);
gtk_constraint_guide_set_min_size (clone, w, h);
gtk_constraint_guide_get_nat_size (guide, &w, &h);
gtk_constraint_guide_set_nat_size (clone, w, h);
gtk_constraint_guide_get_max_size (guide, &w, &h);
gtk_constraint_guide_set_max_size (clone, w, h);
constraint_view_add_guide (CONSTRAINT_VIEW (self->view), clone);
g_object_unref (guide);
g_object_unref (clone);
}
g_object_unref (list);
list = gtk_constraint_layout_observe_constraints (GTK_CONSTRAINT_LAYOUT (layout));
for (i = 0; i < g_list_model_get_n_items (list); i++)
{
GtkConstraint *constraint;
GtkConstraint *clone;
GtkConstraintTarget *target;
GtkConstraintTarget *source;
GtkConstraintAttribute source_attr;
item = g_list_model_get_item (list, i);
constraint = GTK_CONSTRAINT (item);
target = gtk_constraint_get_target (constraint);
source = gtk_constraint_get_source (constraint);
source_attr = gtk_constraint_get_source_attribute (constraint);
if (source == NULL && source_attr == GTK_CONSTRAINT_ATTRIBUTE_NONE)
clone = gtk_constraint_new_constant (find_target (constraint_view_get_model (CONSTRAINT_VIEW (self->view)), target),
gtk_constraint_get_target_attribute (constraint),
gtk_constraint_get_relation (constraint),
gtk_constraint_get_constant (constraint),
gtk_constraint_get_strength (constraint));
else
clone = gtk_constraint_new (find_target (constraint_view_get_model (CONSTRAINT_VIEW (self->view)), target),
gtk_constraint_get_target_attribute (constraint),
gtk_constraint_get_relation (constraint),
find_target (constraint_view_get_model (CONSTRAINT_VIEW (self->view)), source),
source_attr,
gtk_constraint_get_multiplier (constraint),
gtk_constraint_get_constant (constraint),
gtk_constraint_get_strength (constraint));
constraint_view_add_constraint (CONSTRAINT_VIEW (self->view), clone);
g_object_unref (constraint);
g_object_unref (clone);
}
g_object_unref (list);
g_free (path);
g_object_unref (builder);
return TRUE;
}
static void
open_response_cb (GObject *source,
GAsyncResult *result,
void *user_data)
{
GtkFileDialog *dialog = GTK_FILE_DIALOG (source);
ConstraintEditorWindow *self = user_data;
GFile *file;
file = gtk_file_dialog_open_finish (dialog, result, NULL);
if (file)
{
constraint_editor_window_load (self, file);
g_object_unref (file);
}
}
static void
open_cb (GtkWidget *button,
ConstraintEditorWindow *self)
{
GtkFileDialog *dialog;
GFile *cwd;
dialog = gtk_file_dialog_new ();
gtk_file_dialog_set_title (dialog, "Open file");
cwd = g_file_new_for_path (".");
gtk_file_dialog_set_initial_folder (dialog, cwd);
g_object_unref (cwd);
gtk_file_dialog_open (dialog, GTK_WINDOW (self), NULL, open_response_cb, self);
g_object_unref (dialog);
}
static void
serialize_child (GString *str,
int indent,
GtkWidget *child)
{
const char *name;
name = gtk_widget_get_name (child);
g_string_append_printf (str, "%*s<child>\n", indent, "");
g_string_append_printf (str, "%*s <object class=\"GtkLabel\" id=\"%s\">\n", indent, "", name);
g_string_append_printf (str, "%*s <property name=\"label\">%s</property>\n", indent, "", name);
g_string_append_printf (str, "%*s </object>\n", indent, "");
g_string_append_printf (str, "%*s</child>\n", indent, "");
}
static char *
serialize_model (GListModel *list)
{
GString *str = g_string_new ("");
int i;
g_string_append (str, "<interface>\n");
g_string_append (str, " <object class=\"GtkBox\" id=\"view\">\n");
g_string_append (str, " <property name=\"layout-manager\">\n");
g_string_append (str, " <object class=\"GtkConstraintLayout\">\n");
g_string_append (str, " <constraints>\n");
for (i = 0; i < g_list_model_get_n_items (list); i++)
{
gpointer item = g_list_model_get_item (list, i);
g_object_unref (item);
if (GTK_IS_CONSTRAINT (item))
constraint_editor_serialize_constraint (str, 10, GTK_CONSTRAINT (item));
else if (GTK_IS_CONSTRAINT_GUIDE (item))
guide_editor_serialize_guide (str, 10, GTK_CONSTRAINT_GUIDE (item));
}
g_string_append (str, " </constraints>\n");
g_string_append (str, " </object>\n");
g_string_append (str, " </property>\n");
for (i = 0; i < g_list_model_get_n_items (list); i++)
{
gpointer item = g_list_model_get_item (list, i);
g_object_unref (item);
if (GTK_IS_WIDGET (item))
serialize_child (str, 4, GTK_WIDGET (item));
}
g_string_append (str, " </object>\n");
g_string_append (str, "</interface>\n");
return g_string_free (str, FALSE);
}
static void
save_response_cb (GObject *source,
GAsyncResult *result,
void *user_data)
{
GtkFileDialog *dialog = GTK_FILE_DIALOG (source);
ConstraintEditorWindow *self = user_data;
GFile *file;
file = gtk_file_dialog_save_finish (dialog, result, NULL);
if (file)
{
GListModel *model;
char *text;
GError *error = NULL;
model = constraint_view_get_model (CONSTRAINT_VIEW (self->view));
text = serialize_model (model);
g_file_replace_contents (file, text, strlen (text),
NULL, FALSE,
G_FILE_CREATE_NONE,
NULL,
NULL,
&error);
if (error != NULL)
{
GtkAlertDialog *alert;
alert = gtk_alert_dialog_new ("Saving failed");
gtk_alert_dialog_set_detail (alert, error->message);
gtk_alert_dialog_show (alert,
GTK_WINDOW (gtk_widget_get_root (GTK_WIDGET (self))));
g_object_unref (alert);
g_error_free (error);
}
g_free (text);
g_object_unref (file);
}
}
static void
save_cb (GtkWidget *button,
ConstraintEditorWindow *self)
{
GtkFileDialog *dialog;
GFile *cwd;
dialog = gtk_file_dialog_new ();
gtk_file_dialog_set_title (dialog, "Save constraints");
cwd = g_file_new_for_path (".");
gtk_file_dialog_set_initial_folder (dialog, cwd);
g_object_unref (cwd);
gtk_file_dialog_save (dialog,
GTK_WINDOW (gtk_widget_get_root (GTK_WIDGET (button))),
NULL,
save_response_cb, self);
g_object_unref (dialog);
}
static void
constraint_editor_window_dispose (GObject *object)
{
gtk_widget_dispose_template (GTK_WIDGET (object), CONSTRAINT_EDITOR_WINDOW_TYPE);
G_OBJECT_CLASS (constraint_editor_window_parent_class)->dispose (object);
}
static int child_counter;
static int guide_counter;
static void
add_child (ConstraintEditorWindow *win)
{
char *name;
child_counter++;
name = g_strdup_printf ("Child %d", child_counter);
constraint_view_add_child (CONSTRAINT_VIEW (win->view), name);
g_free (name);
}
static void
add_guide (ConstraintEditorWindow *win)
{
char *name;
GtkConstraintGuide *guide;
guide_counter++;
name = g_strdup_printf ("Guide %d", guide_counter);
guide = gtk_constraint_guide_new ();
gtk_constraint_guide_set_name (guide, name);
g_free (name);
constraint_view_add_guide (CONSTRAINT_VIEW (win->view), guide);
}
static void
constraint_editor_done (ConstraintEditor *editor,
GtkConstraint *constraint,
ConstraintEditorWindow *win)
{
GtkConstraint *old_constraint;
g_object_get (editor, "constraint", &old_constraint, NULL);
if (old_constraint)
constraint_view_remove_constraint (CONSTRAINT_VIEW (win->view), old_constraint);
constraint_view_add_constraint (CONSTRAINT_VIEW (win->view), constraint);
g_clear_object (&old_constraint);
gtk_window_destroy (GTK_WINDOW (gtk_widget_get_ancestor (GTK_WIDGET (editor), GTK_TYPE_WINDOW)));
}
static void
edit_constraint (ConstraintEditorWindow *win,
GtkConstraint *constraint)
{
GtkWidget *window;
ConstraintEditor *editor;
GListModel *model;
window = gtk_window_new ();
gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (win));
gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
if (constraint)
gtk_window_set_title (GTK_WINDOW (window), "Edit Constraint");
else
gtk_window_set_title (GTK_WINDOW (window), "Create Constraint");
model = constraint_view_get_model (CONSTRAINT_VIEW (win->view));
editor = constraint_editor_new (model, constraint);
gtk_window_set_child (GTK_WINDOW (window), GTK_WIDGET (editor));
g_signal_connect (editor, "done", G_CALLBACK (constraint_editor_done), win);
gtk_window_present (GTK_WINDOW (window));
}
static void
add_constraint (ConstraintEditorWindow *win)
{
edit_constraint (win, NULL);
}
static void
guide_editor_done (GuideEditor *editor,
GtkConstraintGuide *guide,
ConstraintEditorWindow *win)
{
gtk_window_destroy (GTK_WINDOW (gtk_widget_get_ancestor (GTK_WIDGET (editor), GTK_TYPE_WINDOW)));
}
static void
edit_guide (ConstraintEditorWindow *win,
GtkConstraintGuide *guide)
{
GtkWidget *window;
GuideEditor *editor;
window = gtk_window_new ();
gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
gtk_window_set_transient_for (GTK_WINDOW (window), GTK_WINDOW (win));
gtk_window_set_title (GTK_WINDOW (window), "Edit Guide");
editor = guide_editor_new (guide);
gtk_window_set_child (GTK_WINDOW (window), GTK_WIDGET (editor));
g_signal_connect (editor, "done", G_CALLBACK (guide_editor_done), win);
gtk_window_present (GTK_WINDOW (window));
}
static void
row_activated (GtkListBox *list,
GtkListBoxRow *row,
ConstraintEditorWindow *win)
{
GObject *item;
item = G_OBJECT (g_object_get_data (G_OBJECT (row), "item"));
if (GTK_IS_CONSTRAINT (item))
edit_constraint (win, GTK_CONSTRAINT (item));
else if (GTK_IS_CONSTRAINT_GUIDE (item))
edit_guide (win, GTK_CONSTRAINT_GUIDE (item));
}
static void
constraint_editor_window_class_init (ConstraintEditorWindowClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
object_class->dispose = constraint_editor_window_dispose;
gtk_widget_class_set_template_from_resource (widget_class,
"/org/gtk/gtk4/constraint-editor/constraint-editor-window.ui");
gtk_widget_class_bind_template_child (widget_class, ConstraintEditorWindow, paned);
gtk_widget_class_bind_template_child (widget_class, ConstraintEditorWindow, view);
gtk_widget_class_bind_template_child (widget_class, ConstraintEditorWindow, list);
gtk_widget_class_bind_template_callback (widget_class, open_cb);
gtk_widget_class_bind_template_callback (widget_class, save_cb);
gtk_widget_class_bind_template_callback (widget_class, add_child);
gtk_widget_class_bind_template_callback (widget_class, add_guide);
gtk_widget_class_bind_template_callback (widget_class, add_constraint);
gtk_widget_class_bind_template_callback (widget_class, row_activated);
}
static void
row_edit (GtkButton *button,
ConstraintEditorWindow *win)
{
GtkWidget *row;
GObject *item;
row = gtk_widget_get_ancestor (GTK_WIDGET (button), GTK_TYPE_LIST_BOX_ROW);
item = (GObject *)g_object_get_data (G_OBJECT (row), "item");
if (GTK_IS_CONSTRAINT (item))
edit_constraint (win, GTK_CONSTRAINT (item));
else if (GTK_IS_CONSTRAINT_GUIDE (item))
edit_guide (win, GTK_CONSTRAINT_GUIDE (item));
}
static void
mark_constraints_invalid (ConstraintEditorWindow *win,
gpointer removed)
{
GtkWidget *child;
GObject *item;
for (child = gtk_widget_get_first_child (win->list);
child;
child = gtk_widget_get_next_sibling (child))
{
item = (GObject *)g_object_get_data (G_OBJECT (child), "item");
if (GTK_IS_CONSTRAINT (item))
{
GtkConstraint *constraint = GTK_CONSTRAINT (item);
if (gtk_constraint_get_target (constraint) == (GtkConstraintTarget *)removed ||
gtk_constraint_get_source (constraint) == (GtkConstraintTarget *)removed)
{
GtkWidget *button;
button = (GtkWidget *)g_object_get_data (G_OBJECT (child), "edit");
gtk_button_set_icon_name (GTK_BUTTON (button), "dialog-warning-symbolic");
gtk_widget_set_tooltip_text (button, "Constraint is invalid");
}
}
}
}
static void
row_delete (GtkButton *button,
ConstraintEditorWindow *win)
{
GtkWidget *row;
GObject *item;
row = gtk_widget_get_ancestor (GTK_WIDGET (button), GTK_TYPE_LIST_BOX_ROW);
item = (GObject *)g_object_get_data (G_OBJECT (row), "item");
if (GTK_IS_CONSTRAINT (item))
constraint_view_remove_constraint (CONSTRAINT_VIEW (win->view),
GTK_CONSTRAINT (item));
else if (GTK_IS_CONSTRAINT_GUIDE (item))
{
mark_constraints_invalid (win, item);
constraint_view_remove_guide (CONSTRAINT_VIEW (win->view),
GTK_CONSTRAINT_GUIDE (item));
}
else if (GTK_IS_WIDGET (item))
{
mark_constraints_invalid (win, item);
constraint_view_remove_child (CONSTRAINT_VIEW (win->view),
GTK_WIDGET (item));
}
}
static GtkWidget *
create_widget_func (gpointer item,
gpointer user_data)
{
ConstraintEditorWindow *win = user_data;
const char *name;
char *freeme = NULL;
GtkWidget *row, *box, *label, *button;
if (GTK_IS_WIDGET (item))
name = gtk_widget_get_name (GTK_WIDGET (item));
else if (GTK_IS_CONSTRAINT_GUIDE (item))
name = gtk_constraint_guide_get_name (GTK_CONSTRAINT_GUIDE (item));
else if (GTK_IS_CONSTRAINT (item))
name = freeme = constraint_editor_constraint_to_string (GTK_CONSTRAINT (item));
else
name = "";
row = gtk_list_box_row_new ();
g_object_set_data_full (G_OBJECT (row), "item", g_object_ref (item), g_object_unref);
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
label = gtk_label_new (name);
if (GTK_IS_WIDGET (item) || GTK_IS_CONSTRAINT_GUIDE (item))
g_object_bind_property (item, "name",
label, "label",
G_BINDING_DEFAULT);
gtk_widget_set_margin_start (label, 10);
gtk_widget_set_margin_end (label, 10);
gtk_widget_set_margin_top (label, 10);
gtk_widget_set_margin_bottom (label, 10);
gtk_label_set_xalign (GTK_LABEL (label), 0.0);
gtk_widget_set_hexpand (label, TRUE);
gtk_list_box_row_set_child (GTK_LIST_BOX_ROW (row), box);
gtk_box_append (GTK_BOX (box), label);
if (GTK_IS_CONSTRAINT (item) || GTK_IS_CONSTRAINT_GUIDE (item))
{
button = gtk_button_new_from_icon_name ("document-edit-symbolic");
gtk_button_set_has_frame (GTK_BUTTON (button), FALSE);
g_signal_connect (button, "clicked", G_CALLBACK (row_edit), win);
g_object_set_data (G_OBJECT (row), "edit", button);
gtk_box_append (GTK_BOX (box), button);
button = gtk_button_new_from_icon_name ("edit-delete-symbolic");
gtk_button_set_has_frame (GTK_BUTTON (button), FALSE);
g_signal_connect (button, "clicked", G_CALLBACK (row_delete), win);
gtk_box_append (GTK_BOX (box), button);
}
else if (GTK_IS_WIDGET (item))
{
button = gtk_button_new_from_icon_name ("edit-delete-symbolic");
gtk_button_set_has_frame (GTK_BUTTON (button), FALSE);
g_signal_connect (button, "clicked", G_CALLBACK (row_delete), win);
gtk_box_append (GTK_BOX (box), button);
}
g_free (freeme);
return row;
}
static void
constraint_editor_window_init (ConstraintEditorWindow *self)
{
gtk_widget_init_template (GTK_WIDGET (self));
gtk_list_box_bind_model (GTK_LIST_BOX (self->list),
constraint_view_get_model (CONSTRAINT_VIEW (self->view)),
create_widget_func,
self,
NULL);
}
ConstraintEditorWindow *
constraint_editor_window_new (ConstraintEditorApplication *application)
{
return g_object_new (CONSTRAINT_EDITOR_WINDOW_TYPE,
"application", application,
NULL);
}
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