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gtk2/gtk/gtkmodelbutton.c
Matthias Clasen 736d864d18 modelbutton: Port to gadgets
2015-12-15 08:41:16 -05:00

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/*
* Copyright © 2014 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 licence, 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/>.
*
* Author: Matthias Clasen
*/
#include "config.h"
#include "gtkmodelbutton.h"
#include "gtkbutton.h"
#include "gtkbuttonprivate.h"
#include "gtkwidgetprivate.h"
#include "gtkmenutrackeritem.h"
#include "gtkimage.h"
#include "gtklabel.h"
#include "gtkbox.h"
#include "gtkrender.h"
#include "gtkstylecontext.h"
#include "gtktypebuiltins.h"
#include "gtkstack.h"
#include "gtkpopover.h"
#include "gtkintl.h"
#include "gtkcssnodeprivate.h"
#include "gtkcsscustomgadgetprivate.h"
#include "gtkstylecontextprivate.h"
#include "gtkcontainerprivate.h"
/**
* SECTION:gtkmodelbutton
* @Short_description: A button that uses a GAction as model
* @Title: GtkModelButton
*
* GtkModelButton is a button class that can use a #GAction as its model.
* In contrast to #GtkToggleButton or #GtkRadioButton, which can also
* be backed by a #GAction via the #GtkActionable:action-name property,
* GtkModelButton will adapt its appearance according to the kind of
* action it is backed by, and appear either as a plain, check or
* radio button.
*
* Model buttons are used when popovers from a menu model with
* gtk_popover_new_from_model(); they can also be used manually in
* a #GtkPopoverMenu.
*
* When the action is specified via the #GtkActionable:action-name
* and #GtkActionable:action-target properties, the role of the button
* (i.e. whether it is a plain, check or radio button) is determined by
* the type of the action and doesn't have to be explicitly specified
* with the #GtkModelButton:role property.
*
* The content of the button is specified by the #GtkModelButton:text
* and #GtkModelButton:icon properties.
*
* The appearance of model buttons can be influenced with the
* #GtkModelButton:centered and #GtkModelButton:iconic properties.
*
* Model buttons have built-in support for submenus in #GtkPopoverMenu.
* To make a GtkModelButton that opens a submenu when activated, set
* the #GtkModelButton:menu-name property. To make a button that goes
* back to the parent menu, you should set the #GtkModelButton:inverted
* property to place the submenu indicator at the opposite side.
*
* # Example
*
* |[
* <object class="GtkPopoverMenu">
* <child>
* <object class="GtkBox">
* <property name="visible">True</property>
* <property name="margin">10</property>
* <child>
* <object class="GtkModelButton">
* <property name="visible">True</property>
* <property name="action-name">view.cut</property>
* <property name="text" translatable="yes">Cut</property>
* </object>
* </child>
* <child>
* <object class="GtkModelButton">
* <property name="visible">True</property>
* <property name="action-name">view.copy</property>
* <property name="text" translatable="yes">Copy</property>
* </object>
* </child>
* <child>
* <object class="GtkModelButton">
* <property name="visible">True</property>
* <property name="action-name">view.paste</property>
* <property name="text" translatable="yes">Paste</property>
* </object>
* </child>
* </object>
* </child>
* </object>
* ]|
*
* # CSS nodes
*
* |[<!-- language="plain" -->
* modelbutton
* ├── ...
* ╰── check
* ]|
*
* |[<!-- language="plain" -->
* modelbutton
* ├── ...
* ╰── radio
* ]|
*
* |[<!-- language="plain" -->
* modelbutton
* ├── ...
* ╰── arrow
* ]|
*
* GtkModelButton has a main CSS node with name modelbutton, and a subnode,
* which will have the name check, radio or arrow, depending on the role
* of the button and whether it has a menu name set.
*
* The subnode is positioned before or after the content nodes and gets the
* .left or .right style class, depending on where it is located.
*/
struct _GtkModelButton
{
GtkButton parent_instance;
GtkWidget *box;
GtkWidget *image;
GtkWidget *label;
GtkCssGadget *gadget;
GtkCssGadget *indicator_gadget;
gboolean active;
gboolean centered;
gboolean inverted;
gboolean iconic;
gchar *menu_name;
GtkButtonRole role;
};
typedef GtkButtonClass GtkModelButtonClass;
G_DEFINE_TYPE (GtkModelButton, gtk_model_button, GTK_TYPE_BUTTON)
enum
{
PROP_0,
PROP_ROLE,
PROP_ICON,
PROP_TEXT,
PROP_ACTIVE,
PROP_MENU_NAME,
PROP_INVERTED,
PROP_CENTERED,
PROP_ICONIC,
LAST_PROPERTY
};
static GParamSpec *properties[LAST_PROPERTY] = { NULL, };
static gboolean
indicator_is_left (GtkWidget *widget)
{
GtkModelButton *button = GTK_MODEL_BUTTON (widget);
return ((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL && !button->inverted) ||
(gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR && button->inverted));
}
static void
gtk_model_button_update_state (GtkModelButton *button)
{
GtkStateFlags state;
state = gtk_widget_get_state_flags (GTK_WIDGET (button));
gtk_css_node_set_state (gtk_css_gadget_get_node (button->gadget), state);
if (button->role == GTK_BUTTON_ROLE_CHECK ||
button->role == GTK_BUTTON_ROLE_RADIO)
{
state &= ~GTK_STATE_FLAG_CHECKED;
if (button->active && !button->menu_name)
state |= GTK_STATE_FLAG_CHECKED;
}
if (button->menu_name)
{
state = state & ~(GTK_STATE_FLAG_DIR_LTR|GTK_STATE_FLAG_DIR_RTL);
if (indicator_is_left (GTK_WIDGET (button)))
state = state | GTK_STATE_FLAG_DIR_RTL;
else
state = state | GTK_STATE_FLAG_DIR_LTR;
}
gtk_css_node_set_state (gtk_css_gadget_get_node (button->indicator_gadget), state);
}
static void
update_node_ordering (GtkModelButton *button)
{
GtkCssNode *widget_node, *indicator_node, *node;
widget_node = gtk_widget_get_css_node (GTK_WIDGET (button));
indicator_node = gtk_css_gadget_get_node (button->indicator_gadget);
if (indicator_is_left (GTK_WIDGET (button)))
{
gtk_css_gadget_add_class (button->indicator_gadget, GTK_STYLE_CLASS_LEFT);
gtk_css_gadget_remove_class (button->indicator_gadget, GTK_STYLE_CLASS_RIGHT);
node = gtk_css_node_get_first_child (widget_node);
if (node != indicator_node)
gtk_css_node_insert_before (widget_node, indicator_node, node);
}
else
{
gtk_css_gadget_remove_class (button->indicator_gadget, GTK_STYLE_CLASS_LEFT);
gtk_css_gadget_add_class (button->indicator_gadget, GTK_STYLE_CLASS_RIGHT);
node = gtk_css_node_get_last_child (widget_node);
if (node != indicator_node)
gtk_css_node_insert_after (widget_node, indicator_node, node);
}
}
static void
gtk_model_button_state_flags_changed (GtkWidget *widget,
GtkStateFlags previous_flags)
{
gtk_model_button_update_state (GTK_MODEL_BUTTON (widget));
GTK_WIDGET_CLASS (gtk_model_button_parent_class)->state_flags_changed (widget, previous_flags);
}
static void
gtk_model_button_direction_changed (GtkWidget *widget,
GtkTextDirection previous_dir)
{
GtkModelButton *button = GTK_MODEL_BUTTON (widget);
gtk_model_button_update_state (button);
update_node_ordering (button);
GTK_WIDGET_CLASS (gtk_model_button_parent_class)->direction_changed (widget, previous_dir);
}
static void
update_node_name (GtkModelButton *button)
{
AtkObject *accessible;
AtkRole a11y_role;
const gchar *indicator_name;
gboolean indicator_visible;
GtkCssNode *indicator_node;
accessible = gtk_widget_get_accessible (GTK_WIDGET (button));
switch (button->role)
{
case GTK_BUTTON_ROLE_NORMAL:
a11y_role = ATK_ROLE_PUSH_BUTTON;
if (button->menu_name)
{
indicator_name = I_("arrow");
indicator_visible = TRUE;
}
else
{
indicator_name = I_("check");
indicator_visible = FALSE;
}
break;
case GTK_BUTTON_ROLE_CHECK:
a11y_role = ATK_ROLE_CHECK_BOX;
indicator_name = I_("check");
indicator_visible = TRUE;
break;
case GTK_BUTTON_ROLE_RADIO:
a11y_role = ATK_ROLE_RADIO_BUTTON;
indicator_name = I_("radio");
indicator_visible = TRUE;
break;
default:
g_assert_not_reached ();
}
if (button->iconic)
indicator_visible = FALSE;
atk_object_set_role (accessible, a11y_role);
indicator_node = gtk_css_gadget_get_node (button->indicator_gadget);
gtk_css_node_set_name (indicator_node, indicator_name);
gtk_css_node_set_visible (indicator_node, indicator_visible);
}
static void
gtk_model_button_set_role (GtkModelButton *button,
GtkButtonRole role)
{
if (role == button->role)
return;
button->role = role;
update_node_name (button);
gtk_model_button_update_state (button);
gtk_widget_queue_draw (GTK_WIDGET (button));
g_object_notify_by_pspec (G_OBJECT (button), properties[PROP_ROLE]);
}
static void
update_visibility (GtkModelButton *button)
{
gboolean has_icon;
gboolean has_text;
has_icon = gtk_image_get_storage_type (GTK_IMAGE (button->image)) != GTK_IMAGE_EMPTY;
has_text = gtk_label_get_text (GTK_LABEL (button->label))[0] != '\0';
gtk_widget_set_visible (button->image, has_icon && (button->iconic || !has_text));
gtk_widget_set_visible (button->label, has_text && (!button->iconic || !has_icon));
}
static void
gtk_model_button_set_icon (GtkModelButton *button,
GIcon *icon)
{
gtk_image_set_from_gicon (GTK_IMAGE (button->image), icon, GTK_ICON_SIZE_MENU);
update_visibility (button);
g_object_notify_by_pspec (G_OBJECT (button), properties[PROP_ICON]);
}
static void
gtk_model_button_set_text (GtkModelButton *button,
const gchar *text)
{
gtk_label_set_text_with_mnemonic (GTK_LABEL (button->label), text);
update_visibility (button);
g_object_notify_by_pspec (G_OBJECT (button), properties[PROP_TEXT]);
}
static void
gtk_model_button_set_active (GtkModelButton *button,
gboolean active)
{
if (button->active == active)
return;
button->active = active;
gtk_model_button_update_state (button);
gtk_widget_queue_draw (GTK_WIDGET (button));
g_object_notify_by_pspec (G_OBJECT (button), properties[PROP_ACTIVE]);
}
static void
gtk_model_button_set_menu_name (GtkModelButton *button,
const gchar *menu_name)
{
g_free (button->menu_name);
button->menu_name = g_strdup (menu_name);
update_node_name (button);
gtk_model_button_update_state (button);
if (menu_name)
gtk_css_gadget_add_class (button->indicator_gadget, GTK_STYLE_CLASS_EXPANDER);
else
gtk_css_gadget_remove_class (button->indicator_gadget, GTK_STYLE_CLASS_EXPANDER);
gtk_widget_queue_resize (GTK_WIDGET (button));
g_object_notify_by_pspec (G_OBJECT (button), properties[PROP_MENU_NAME]);
}
static void
gtk_model_button_set_inverted (GtkModelButton *button,
gboolean inverted)
{
if (button->inverted == inverted)
return;
button->inverted = inverted;
gtk_model_button_update_state (button);
update_node_ordering (button);
gtk_widget_queue_resize (GTK_WIDGET (button));
g_object_notify_by_pspec (G_OBJECT (button), properties[PROP_INVERTED]);
}
static void
gtk_model_button_set_centered (GtkModelButton *button,
gboolean centered)
{
if (button->centered == centered)
return;
button->centered = centered;
gtk_widget_set_halign (button->box, button->centered ? GTK_ALIGN_CENTER : GTK_ALIGN_FILL);
gtk_widget_queue_draw (GTK_WIDGET (button));
g_object_notify_by_pspec (G_OBJECT (button), properties[PROP_CENTERED]);
}
static void
gtk_model_button_set_iconic (GtkModelButton *button,
gboolean iconic)
{
GtkCssNode *widget_node;
GtkCssNode *indicator_node;
if (button->iconic == iconic)
return;
button->iconic = iconic;
widget_node = gtk_widget_get_css_node (GTK_WIDGET (button));
indicator_node = gtk_css_gadget_get_node (button->indicator_gadget);
if (iconic)
{
gtk_css_node_set_name (widget_node, I_("button"));
gtk_css_gadget_add_class (button->gadget, "image-button");
gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NORMAL);
gtk_css_node_set_visible (indicator_node, FALSE);
}
else
{
gtk_css_node_set_name (widget_node, I_("modelbutton"));
gtk_css_gadget_remove_class (button->gadget, "image-button");
gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
gtk_css_node_set_visible (indicator_node,
button->role != GTK_BUTTON_ROLE_NORMAL ||
button->menu_name == NULL);
}
update_visibility (button);
gtk_widget_queue_resize (GTK_WIDGET (button));
g_object_notify_by_pspec (G_OBJECT (button), properties[PROP_ICONIC]);
}
static void
gtk_model_button_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkModelButton *button = GTK_MODEL_BUTTON (object);
switch (prop_id)
{
case PROP_ROLE:
g_value_set_enum (value, button->role);
break;
case PROP_ICON:
{
GIcon *icon;
gtk_image_get_gicon (GTK_IMAGE (button->image), &icon, NULL);
g_value_set_object (value, icon);
}
break;
case PROP_TEXT:
g_value_set_string (value, gtk_label_get_text (GTK_LABEL (button->label)));
break;
case PROP_ACTIVE:
g_value_set_boolean (value, button->active);
break;
case PROP_MENU_NAME:
g_value_set_string (value, button->menu_name);
break;
case PROP_INVERTED:
g_value_set_boolean (value, button->inverted);
break;
case PROP_CENTERED:
g_value_set_boolean (value, button->centered);
break;
case PROP_ICONIC:
g_value_set_boolean (value, button->iconic);
break;
default:
g_assert_not_reached ();
}
}
static void
gtk_model_button_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkModelButton *button = GTK_MODEL_BUTTON (object);
switch (prop_id)
{
case PROP_ROLE:
gtk_model_button_set_role (button, g_value_get_enum (value));
break;
case PROP_ICON:
gtk_model_button_set_icon (button, g_value_get_object (value));
break;
case PROP_TEXT:
gtk_model_button_set_text (button, g_value_get_string (value));
break;
case PROP_ACTIVE:
gtk_model_button_set_active (button, g_value_get_boolean (value));
break;
case PROP_MENU_NAME:
gtk_model_button_set_menu_name (button, g_value_get_string (value));
break;
case PROP_INVERTED:
gtk_model_button_set_inverted (button, g_value_get_boolean (value));
break;
case PROP_CENTERED:
gtk_model_button_set_centered (button, g_value_get_boolean (value));
break;
case PROP_ICONIC:
gtk_model_button_set_iconic (button, g_value_get_boolean (value));
break;
default:
g_assert_not_reached ();
}
}
static gboolean
has_sibling_with_indicator (GtkWidget *button)
{
GtkWidget *parent;
gboolean has_indicator;
GList *children, *l;
GtkModelButton *sibling;
has_indicator = FALSE;
parent = gtk_widget_get_parent (button);
children = gtk_container_get_children (GTK_CONTAINER (parent));
for (l = children; l; l = l->next)
{
sibling = l->data;
if (!GTK_IS_MODEL_BUTTON (sibling))
continue;
if (!gtk_widget_is_visible (GTK_WIDGET (sibling)))
continue;
if (!sibling->centered &&
(sibling->menu_name || sibling->role != GTK_BUTTON_ROLE_NORMAL))
{
has_indicator = TRUE;
break;
}
}
g_list_free (children);
return has_indicator;
}
static gboolean
needs_indicator (GtkModelButton *button)
{
if (button->role != GTK_BUTTON_ROLE_NORMAL)
return TRUE;
return has_sibling_with_indicator (GTK_WIDGET (button));
}
static void
gtk_model_button_get_preferred_width_for_height (GtkWidget *widget,
gint height,
gint *minimum,
gint *natural)
{
GtkCssGadget *gadget;
if (GTK_MODEL_BUTTON (widget)->iconic)
gadget = GTK_BUTTON (widget)->priv->gadget;
else
gadget = GTK_MODEL_BUTTON (widget)->gadget;
gtk_css_gadget_get_preferred_size (gadget,
GTK_ORIENTATION_HORIZONTAL,
height,
minimum, natural,
NULL, NULL);
}
static void
gtk_model_button_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkCssGadget *gadget;
if (GTK_MODEL_BUTTON (widget)->iconic)
gadget = GTK_BUTTON (widget)->priv->gadget;
else
gadget = GTK_MODEL_BUTTON (widget)->gadget;
gtk_css_gadget_get_preferred_size (gadget,
GTK_ORIENTATION_HORIZONTAL,
-1,
minimum, natural,
NULL, NULL);
}
static void
gtk_model_button_get_preferred_height_and_baseline_for_width (GtkWidget *widget,
gint width,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline)
{
GtkCssGadget *gadget;
if (GTK_MODEL_BUTTON (widget)->iconic)
gadget = GTK_BUTTON (widget)->priv->gadget;
else
gadget = GTK_MODEL_BUTTON (widget)->gadget;
gtk_css_gadget_get_preferred_size (gadget,
GTK_ORIENTATION_VERTICAL,
width,
minimum, natural,
minimum_baseline, natural_baseline);
}
static void
gtk_model_button_get_preferred_height_for_width (GtkWidget *widget,
gint width,
gint *minimum,
gint *natural)
{
GtkCssGadget *gadget;
if (GTK_MODEL_BUTTON (widget)->iconic)
gadget = GTK_BUTTON (widget)->priv->gadget;
else
gadget = GTK_MODEL_BUTTON (widget)->gadget;
gtk_css_gadget_get_preferred_size (gadget,
GTK_ORIENTATION_VERTICAL,
width,
minimum, natural,
NULL, NULL);
}
static void
gtk_model_button_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkCssGadget *gadget;
if (GTK_MODEL_BUTTON (widget)->iconic)
gadget = GTK_BUTTON (widget)->priv->gadget;
else
gadget = GTK_MODEL_BUTTON (widget)->gadget;
gtk_css_gadget_get_preferred_size (gadget,
GTK_ORIENTATION_VERTICAL,
-1,
minimum, natural,
NULL, NULL);
}
static void
gtk_model_button_measure_indicator (GtkCssGadget *gadget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline,
gpointer data)
{
gint indicator_size;
gtk_icon_size_lookup (GTK_ICON_SIZE_MENU, &indicator_size, NULL);
*minimum = *natural = indicator_size;
}
static void
gtk_model_button_measure (GtkCssGadget *gadget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline,
gpointer data)
{
GtkWidget *widget;
GtkModelButton *button;
GtkWidget *child;
widget = gtk_css_gadget_get_owner (gadget);
button = GTK_MODEL_BUTTON (widget);
child = gtk_bin_get_child (GTK_BIN (widget));
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
gint check_min, check_nat;
gtk_css_gadget_get_preferred_size (button->indicator_gadget,
GTK_ORIENTATION_HORIZONTAL,
-1,
&check_min, &check_nat,
NULL, NULL);
if (child && gtk_widget_get_visible (child))
{
_gtk_widget_get_preferred_size_for_size (child,
GTK_ORIENTATION_HORIZONTAL,
for_size,
minimum, natural,
minimum_baseline, natural_baseline);
}
else
{
*minimum = 0;
*natural = 0;
}
if (button->centered)
{
*minimum += 2 * check_min;
*natural += 2 * check_nat;
}
else if (needs_indicator (button))
{
*minimum += check_min;
*natural += check_nat;
}
}
else
{
gint check_min, check_nat;
gtk_css_gadget_get_preferred_size (button->indicator_gadget,
GTK_ORIENTATION_VERTICAL,
-1,
&check_min, &check_nat,
NULL, NULL);
if (child && gtk_widget_get_visible (child))
{
gint child_min, child_nat;
gint child_min_baseline = -1, child_nat_baseline = -1;
if (for_size > -1)
{
if (button->centered)
for_size -= 2 * check_nat;
else if (needs_indicator (button))
for_size -= check_nat;
}
gtk_widget_get_preferred_height_and_baseline_for_width (child, for_size,
&child_min, &child_nat,
&child_min_baseline, &child_nat_baseline);
if (button->centered)
{
*minimum = MAX (2 * check_min, child_min);
*natural = MAX (2 * check_nat, child_nat);
}
else if (needs_indicator (button))
{
*minimum = MAX (check_min, child_min);
*natural = MAX (check_nat, child_nat);
}
else
{
*minimum = child_min;
*natural = child_nat;
}
if (minimum_baseline && child_min_baseline >= 0)
*minimum_baseline = child_min_baseline + (*minimum - child_min) / 2;
if (natural_baseline && child_nat_baseline >= 0)
*natural_baseline = child_nat_baseline + (*natural - child_nat) / 2;
}
else
{
if (button->centered)
{
*minimum = 2 * check_min;
*natural = 2 * check_nat;
}
else if (needs_indicator (button))
{
*minimum = check_min;
*natural = check_nat;
}
else
{
*minimum = 0;
*natural = 0;
}
}
}
}
static void
gtk_model_button_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkCssGadget *gadget;
GdkRectangle clip;
if (GTK_MODEL_BUTTON (widget)->iconic)
gadget = GTK_BUTTON (widget)->priv->gadget;
else
gadget = GTK_MODEL_BUTTON (widget)->gadget;
gtk_widget_set_allocation (widget, allocation);
if (gtk_widget_get_realized (widget))
gdk_window_move_resize (gtk_button_get_event_window (GTK_BUTTON (widget)),
allocation->x, allocation->y,
allocation->width, allocation->height);
gtk_css_gadget_allocate (gadget,
allocation,
gtk_widget_get_allocated_baseline (widget),
&clip);
gtk_widget_set_clip (widget, &clip);
}
static void
gtk_model_button_allocate (GtkCssGadget *gadget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip,
gpointer unused)
{
GtkWidget *widget;
GtkModelButton *button;
PangoContext *pango_context;
PangoFontMetrics *metrics;
GtkAllocation child_allocation;
GtkWidget *child;
gint spacing;
gint check_min_width, check_nat_width;
gint check_min_height, check_nat_height;
GdkRectangle check_clip;
widget = gtk_css_gadget_get_owner (gadget);
button = GTK_MODEL_BUTTON (widget);
child = gtk_bin_get_child (GTK_BIN (widget));
spacing = 0;
gtk_css_gadget_get_preferred_size (button->indicator_gadget,
GTK_ORIENTATION_HORIZONTAL,
-1,
&check_min_width, &check_nat_width,
NULL, NULL);
gtk_css_gadget_get_preferred_size (button->indicator_gadget,
GTK_ORIENTATION_VERTICAL,
-1,
&check_min_height, &check_nat_height,
NULL, NULL);
if (indicator_is_left (widget))
child_allocation.x = allocation->x + spacing;
else
child_allocation.x = allocation->x + allocation->width - check_nat_width - spacing;
child_allocation.y = allocation->y + (allocation->height - check_nat_height) / 2;
child_allocation.width = check_nat_width;
child_allocation.height = check_nat_height;
gtk_css_gadget_allocate (button->indicator_gadget,
&child_allocation,
baseline,
&check_clip);
if (child && gtk_widget_get_visible (child))
{
GtkBorder border = { 0, };
if (button->centered)
{
border.left = check_nat_width;
border.right = check_nat_width;
}
else if (needs_indicator (button))
{
if (indicator_is_left (widget))
border.left += check_nat_width;
else
border.right += check_nat_width;
}
child_allocation.x = allocation->x + border.left;
child_allocation.y = allocation->y + border.top;
child_allocation.width = allocation->width - border.left - border.right;
child_allocation.height = allocation->height - border.top - border.bottom;
baseline = gtk_widget_get_allocated_baseline (widget);
if (baseline != -1)
baseline -= border.top;
gtk_widget_size_allocate_with_baseline (child, &child_allocation, baseline);
}
pango_context = gtk_widget_get_pango_context (widget);
metrics = pango_context_get_metrics (pango_context,
pango_context_get_font_description (pango_context),
pango_context_get_language (pango_context));
GTK_BUTTON (button)->priv->baseline_align =
(double)pango_font_metrics_get_ascent (metrics) /
(pango_font_metrics_get_ascent (metrics) + pango_font_metrics_get_descent (metrics));
pango_font_metrics_unref (metrics);
gtk_container_get_children_clip (GTK_CONTAINER (widget), out_clip);
gdk_rectangle_union (out_clip, &check_clip, out_clip);
}
static gint
gtk_model_button_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkCssGadget *gadget;
if (GTK_MODEL_BUTTON (widget)->iconic)
gadget = GTK_BUTTON (widget)->priv->gadget;
else
gadget = GTK_MODEL_BUTTON (widget)->gadget;
gtk_css_gadget_draw (gadget, cr);
return FALSE;
}
static gboolean
gtk_model_button_render_indicator (GtkCssGadget *gadget,
cairo_t *cr,
int x,
int y,
int width,
int height,
gpointer data)
{
GtkWidget *widget;
GtkModelButton *button;
GtkCssNode *indicator_node;
GtkStyleContext *context;
widget = gtk_css_gadget_get_owner (gadget);
button = GTK_MODEL_BUTTON (widget);
context = gtk_widget_get_style_context (widget);
indicator_node = gtk_css_gadget_get_node (button->indicator_gadget);
if (button->menu_name)
{
gtk_style_context_save_to_node (context, indicator_node);
gtk_render_expander (context, cr, x, y, width, height);
gtk_style_context_restore (context);
}
else if (button->role == GTK_BUTTON_ROLE_CHECK)
{
gtk_style_context_save_to_node (context, indicator_node);
gtk_render_check (context, cr, x, y, width, height);
gtk_style_context_restore (context);
}
else if (button->role == GTK_BUTTON_ROLE_RADIO)
{
gtk_style_context_save_to_node (context, indicator_node);
gtk_render_option (context, cr, x, y, width, height);
gtk_style_context_restore (context);
}
return FALSE;
}
static gboolean
gtk_model_button_render (GtkCssGadget *gadget,
cairo_t *cr,
int x,
int y,
int width,
int height,
gpointer data)
{
GtkWidget *widget;
GtkModelButton *button;
GtkWidget *child;
widget = gtk_css_gadget_get_owner (gadget);
button = GTK_MODEL_BUTTON (widget);
gtk_css_gadget_draw (button->indicator_gadget, cr);
child = gtk_bin_get_child (GTK_BIN (widget));
if (child)
gtk_container_propagate_draw (GTK_CONTAINER (widget), child, cr);
return gtk_widget_has_visible_focus (widget);
}
static void
gtk_model_button_destroy (GtkWidget *widget)
{
GtkModelButton *model_button = GTK_MODEL_BUTTON (widget);
g_clear_pointer (&model_button->menu_name, g_free);
GTK_WIDGET_CLASS (gtk_model_button_parent_class)->destroy (widget);
}
static void
gtk_model_button_clicked (GtkButton *button)
{
GtkModelButton *model_button = GTK_MODEL_BUTTON (button);
g_print ("model button clicked\n");
if (model_button->menu_name != NULL)
{
GtkWidget *stack;
stack = gtk_widget_get_ancestor (GTK_WIDGET (button), GTK_TYPE_STACK);
if (stack != NULL)
gtk_stack_set_visible_child_name (GTK_STACK (stack), model_button->menu_name);
}
else if (model_button->role == GTK_BUTTON_ROLE_NORMAL)
{
GtkWidget *popover;
popover = gtk_widget_get_ancestor (GTK_WIDGET (button), GTK_TYPE_POPOVER);
if (popover != NULL)
gtk_widget_hide (popover);
}
}
static void
gtk_model_button_finalize (GObject *object)
{
GtkModelButton *button = GTK_MODEL_BUTTON (object);
g_clear_object (&button->indicator_gadget);
g_clear_object (&button->gadget);
G_OBJECT_CLASS (gtk_model_button_parent_class)->finalize (object);
}
static void
gtk_model_button_class_init (GtkModelButtonClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
GtkButtonClass *button_class = GTK_BUTTON_CLASS (class);
object_class->finalize = gtk_model_button_finalize;
object_class->get_property = gtk_model_button_get_property;
object_class->set_property = gtk_model_button_set_property;
widget_class->get_preferred_width = gtk_model_button_get_preferred_width;
widget_class->get_preferred_width_for_height = gtk_model_button_get_preferred_width_for_height;
widget_class->get_preferred_height = gtk_model_button_get_preferred_height;
widget_class->get_preferred_height_for_width = gtk_model_button_get_preferred_height_for_width;
widget_class->get_preferred_height_and_baseline_for_width = gtk_model_button_get_preferred_height_and_baseline_for_width;
widget_class->size_allocate = gtk_model_button_size_allocate;
widget_class->draw = gtk_model_button_draw;
widget_class->destroy = gtk_model_button_destroy;
widget_class->state_flags_changed = gtk_model_button_state_flags_changed;
widget_class->direction_changed = gtk_model_button_direction_changed;
button_class->clicked = gtk_model_button_clicked;
/**
* GtkModelButton:role:
*
* Specifies whether the button is a plain, check or radio button.
* When #GtkActionable:action-name is set, the role will be determined
* from the action and does not have to be set explicitly.
*
* Since: 3.16
*/
properties[PROP_ROLE] =
g_param_spec_enum ("role",
P_("Role"),
P_("The role of this button"),
GTK_TYPE_BUTTON_ROLE,
GTK_BUTTON_ROLE_NORMAL,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkModelButton:icon:
*
* A #GIcon that will be used if iconic appearance for the button is
* desired.
*
* Since: 3.16
*/
properties[PROP_ICON] =
g_param_spec_object ("icon",
P_("Icon"),
P_("The icon"),
G_TYPE_ICON,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkModelButton:text:
*
* The label for the button.
*
* Since: 3.16
*/
properties[PROP_TEXT] =
g_param_spec_string ("text",
P_("Text"),
P_("The text"),
"",
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkModelButton:active:
*
* The state of the button. This is reflecting the state of the associated
* #GAction.
*
* Since: 3.16
*/
properties[PROP_ACTIVE] =
g_param_spec_boolean ("active",
P_("Active"),
P_("Active"),
FALSE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkModelButton:menu-name:
*
* The name of a submenu to open when the button is activated.
* If this is set, the button should not have an action associated with it.
*
* Since: 3.16
*/
properties[PROP_MENU_NAME] =
g_param_spec_string ("menu-name",
P_("Menu name"),
P_("The name of the menu to open"),
NULL,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkModelButton:inverted:
*
* Whether to show the submenu indicator at the opposite side than normal.
* This property should be set for model buttons that 'go back' to a parent
* menu.
*
* Since: 3.16
*/
properties[PROP_INVERTED] =
g_param_spec_boolean ("inverted",
P_("Inverted"),
P_("Whether the menu is a parent"),
FALSE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkModelButton:centered:
*
* Wether to render the button contents centered instead of left-aligned.
* This property should be set for title-like items.
*
* Since: 3.16
*/
properties[PROP_CENTERED] =
g_param_spec_boolean ("centered",
P_("Centered"),
P_("Whether to center the contents"),
FALSE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
/**
* GtkModelButton:iconic:
*
* If this property is set, the button will show an icon if one is set.
* If no icon is set, the text will be used. This is typically used for
* horizontal sections of linked buttons.
*
* Since: 3.16
*/
properties[PROP_ICONIC] =
g_param_spec_boolean ("iconic",
P_("Iconic"),
P_("Whether to prefer the icon over text"),
FALSE,
G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (object_class, LAST_PROPERTY, properties);
gtk_widget_class_set_accessible_role (GTK_WIDGET_CLASS (class), ATK_ROLE_PUSH_BUTTON);
gtk_widget_class_set_css_name (GTK_WIDGET_CLASS (class), "modelbutton");
}
static void
gtk_model_button_init (GtkModelButton *button)
{
GtkCssNode *widget_node;
gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
button->box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_widget_set_margin_start (button->box, 12);
gtk_widget_set_margin_end (button->box, 12);
gtk_widget_set_margin_top (button->box, 3);
gtk_widget_set_margin_bottom (button->box, 3);
gtk_widget_set_halign (button->box, GTK_ALIGN_FILL);
gtk_widget_show (button->box);
button->image = gtk_image_new ();
gtk_widget_set_no_show_all (button->image, TRUE);
g_object_set (button->image, "margin", 4, NULL);
button->label = gtk_label_new ("");
gtk_widget_set_no_show_all (button->label, TRUE);
gtk_container_add (GTK_CONTAINER (button->box), button->image);
gtk_container_add (GTK_CONTAINER (button->box), button->label);
gtk_container_add (GTK_CONTAINER (button), button->box);
widget_node = gtk_widget_get_css_node (GTK_WIDGET (button));
button->gadget = gtk_css_custom_gadget_new_for_node (widget_node,
GTK_WIDGET (button),
gtk_model_button_measure,
gtk_model_button_allocate,
gtk_model_button_render,
NULL,
NULL);
button->indicator_gadget = gtk_css_custom_gadget_new ("check",
GTK_WIDGET (button),
button->gadget,
NULL,
gtk_model_button_measure_indicator,
NULL,
gtk_model_button_render_indicator,
NULL,
NULL);
}
/**
* gtk_model_button_new:
*
* Creates a new GtkModelButton.
*
* Returns: the newly created #GtkModelButton widget
*
* Since: 3.16
*/
GtkWidget *
gtk_model_button_new (void)
{
return g_object_new (GTK_TYPE_MODEL_BUTTON, NULL);
}
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