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gtk2/gtk/gtkmodelbutton.c

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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"
struct _GtkModelButton
{
GtkButton parent_instance;
GtkWidget *box;
GtkWidget *image;
GtkWidget *label;
gboolean toggled;
gboolean has_submenu;
gboolean centered;
gboolean inverted;
gboolean iconic;
GtkMenuTrackerItemRole role;
};
typedef GtkButtonClass GtkModelButtonClass;
G_DEFINE_TYPE (GtkModelButton, gtk_model_button, GTK_TYPE_BUTTON)
enum
{
PROP_0,
PROP_ACTION_ROLE,
PROP_ICON,
PROP_TEXT,
PROP_TOGGLED,
PROP_ACCEL,
PROP_HAS_SUBMENU,
PROP_INVERTED,
PROP_CENTERED,
PROP_ICONIC
};
static void
gtk_model_button_set_action_role (GtkModelButton *button,
GtkMenuTrackerItemRole role)
{
AtkObject *accessible;
AtkRole a11y_role;
if (role == button->role)
return;
button->role = role;
gtk_widget_queue_draw (GTK_WIDGET (button));
accessible = gtk_widget_get_accessible (GTK_WIDGET (button));
switch (role)
{
case GTK_MENU_TRACKER_ITEM_ROLE_NORMAL:
a11y_role = ATK_ROLE_PUSH_BUTTON;
break;
case GTK_MENU_TRACKER_ITEM_ROLE_CHECK:
a11y_role = ATK_ROLE_CHECK_BOX;
break;
case GTK_MENU_TRACKER_ITEM_ROLE_RADIO:
a11y_role = ATK_ROLE_RADIO_BUTTON;
break;
default:
g_assert_not_reached ();
}
atk_object_set_role (accessible, a11y_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);
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);
}
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);
}
static void
gtk_model_button_set_accel (GtkModelButton *button,
const gchar *accel)
{
/* ignore */
}
static void gtk_model_button_update_state (GtkModelButton *button);
static void
gtk_model_button_set_toggled (GtkModelButton *button,
gboolean toggled)
{
button->toggled = toggled;
gtk_model_button_update_state (button);
gtk_widget_queue_draw (GTK_WIDGET (button));
}
static void
gtk_model_button_set_has_submenu (GtkModelButton *button,
gboolean has_submenu)
{
button->has_submenu = has_submenu;
gtk_widget_queue_resize (GTK_WIDGET (button));
}
static void
gtk_model_button_set_inverted (GtkModelButton *button,
gboolean inverted)
{
button->inverted = inverted;
gtk_widget_queue_resize (GTK_WIDGET (button));
}
static void
gtk_model_button_set_centered (GtkModelButton *button,
gboolean centered)
{
button->centered = centered;
gtk_widget_set_halign (button->box, button->centered ? GTK_ALIGN_CENTER : GTK_ALIGN_FILL);
gtk_widget_queue_draw (GTK_WIDGET (button));
}
static void
gtk_model_button_set_iconic (GtkModelButton *button,
gboolean iconic)
{
GtkStyleContext *context;
button->iconic = iconic;
context = gtk_widget_get_style_context (GTK_WIDGET (button));
if (iconic)
{
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_MENUITEM);
gtk_style_context_add_class (context, "image-button");
gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NORMAL);
}
else
{
gtk_style_context_add_class (context, GTK_STYLE_CLASS_MENUITEM);
gtk_style_context_remove_class (context, "image-button");
gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
}
update_visibility (button);
gtk_widget_queue_resize (GTK_WIDGET (button));
}
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_ACTION_ROLE:
gtk_model_button_set_action_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_TOGGLED:
gtk_model_button_set_toggled (button, g_value_get_boolean (value));
break;
case PROP_ACCEL:
gtk_model_button_set_accel (button, g_value_get_string (value));
break;
case PROP_HAS_SUBMENU:
gtk_model_button_set_has_submenu (button, g_value_get_boolean (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 void
gtk_model_button_get_full_border (GtkModelButton *button,
GtkBorder *border,
gint *indicator)
{
gint indicator_size, indicator_spacing;
gint border_width;
border_width = gtk_container_get_border_width (GTK_CONTAINER (button));
gtk_icon_size_lookup (GTK_ICON_SIZE_MENU, &indicator_size, NULL);
indicator_spacing = indicator_size / 8;
border->left = border_width;
border->right = border_width;
border->top = border_width;
border->bottom = border_width;
if (button->iconic)
*indicator = 0;
else
*indicator = indicator_size + 2 * indicator_spacing;
}
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->has_submenu || sibling->role != GTK_MENU_TRACKER_ITEM_ROLE_NORMAL))
{
has_indicator = TRUE;
break;
}
}
g_list_free (children);
return has_indicator;
}
static gboolean
needs_indicator (GtkModelButton *button)
{
if (button->role != GTK_MENU_TRACKER_ITEM_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)
{
GtkModelButton *button = GTK_MODEL_BUTTON (widget);
GtkWidget *child;
GtkBorder border;
gint indicator;
gtk_model_button_get_full_border (button, &border, &indicator);
child = gtk_bin_get_child (GTK_BIN (widget));
if (child && gtk_widget_get_visible (child))
{
if (height > -1)
height -= border.top + border.bottom;
_gtk_widget_get_preferred_size_for_size (child,
GTK_ORIENTATION_HORIZONTAL,
height,
minimum, natural,
NULL, NULL);
}
else
{
*minimum = 0;
*natural = 0;
}
*minimum += border.left + border.right;
*natural += border.left + border.right;
if (button->centered)
{
*minimum += 2 * indicator;
*natural += 2 * indicator;
}
else if (needs_indicator (button))
{
*minimum += indicator;
*natural += indicator;
}
}
static void
gtk_model_button_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
gtk_model_button_get_preferred_width_for_height (widget, -1, minimum, natural);
}
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)
{
GtkModelButton *button = GTK_MODEL_BUTTON (widget);
GtkWidget *child;
GtkBorder border;
gint indicator;
gtk_model_button_get_full_border (button, &border, &indicator);
child = gtk_bin_get_child (GTK_BIN (widget));
if (child && gtk_widget_get_visible (child))
{
gint child_min, child_nat;
gint child_min_baseline = -1, child_nat_baseline = -1;
if (width > -1)
{
width -= border.left + border.right;
if (button->centered)
width -= 2 * indicator;
else if (needs_indicator (button))
width -= indicator;
}
gtk_widget_get_preferred_height_and_baseline_for_width (child, width,
&child_min, &child_nat,
&child_min_baseline, &child_nat_baseline);
if (button->centered)
{
*minimum = MAX (2 * indicator, child_min);
*natural = MAX (2 * indicator, child_nat);
}
else if (needs_indicator (button))
{
*minimum = MAX (indicator, child_min);
*natural = MAX (indicator, child_nat);
}
else
{
*minimum = child_min;
*natural = child_nat;
}
if (minimum_baseline && child_min_baseline >= 0)
*minimum_baseline = child_min_baseline + border.top + (*minimum - child_min) / 2;
if (natural_baseline && child_nat_baseline >= 0)
*natural_baseline = child_nat_baseline + border.top + (*natural - child_nat) / 2;
}
else
{
if (button->centered)
{
*minimum = 2 * indicator;
*natural = 2 * indicator;
}
else if (needs_indicator (button))
{
*minimum = indicator;
*natural = indicator;
}
else
{
*minimum = 0;
*natural = 0;
}
}
*minimum += border.top + border.bottom;
*natural += border.top + border.bottom;
}
static void
gtk_model_button_get_preferred_height_for_width (GtkWidget *widget,
gint width,
gint *minimum,
gint *natural)
{
gtk_model_button_get_preferred_height_and_baseline_for_width (widget, width,
minimum, natural,
NULL, NULL);
}
static void
gtk_model_button_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
gtk_model_button_get_preferred_height_and_baseline_for_width (widget, -1,
minimum, natural,
NULL, 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_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkModelButton *button = GTK_MODEL_BUTTON (widget);
PangoContext *pango_context;
PangoFontMetrics *metrics;
GtkAllocation child_allocation;
gint baseline;
GtkWidget *child;
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);
child = gtk_bin_get_child (GTK_BIN (widget));
if (child && gtk_widget_get_visible (child))
{
GtkBorder border;
gint indicator;
gtk_model_button_get_full_border (button, &border, &indicator);
if (button->centered)
{
border.left += indicator;
border.right += indicator;
}
else if (needs_indicator (button))
{
if (indicator_is_left (widget))
border.left += indicator;
else
border.right += indicator;
}
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);
}
static GtkStateFlags
get_button_state (GtkModelButton *model_button)
{
GtkButton *button = GTK_BUTTON (model_button);
GtkStateFlags state;
state = gtk_widget_get_state_flags (GTK_WIDGET (model_button));
state &= ~(GTK_STATE_FLAG_INCONSISTENT |
GTK_STATE_FLAG_ACTIVE |
GTK_STATE_FLAG_CHECKED |
GTK_STATE_FLAG_PRELIGHT);
if (model_button->toggled && !model_button->has_submenu)
state |= GTK_STATE_FLAG_CHECKED;
if (button->priv->activate_timeout ||
(button->priv->button_down && button->priv->in_button))
state |= GTK_STATE_FLAG_ACTIVE;
if (button->priv->in_button)
state |= GTK_STATE_FLAG_PRELIGHT;
return state;
}
static void
gtk_model_button_update_state (GtkModelButton *button)
{
gtk_widget_set_state_flags (GTK_WIDGET (button), get_button_state (button), TRUE);
}
static gint
gtk_model_button_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkModelButton *model_button = GTK_MODEL_BUTTON (widget);
GtkButton *button = GTK_BUTTON (widget);
GtkWidget *child;
GtkStyleContext *context;
GtkStateFlags state;
gint border_width;
gint x, y;
gint width, height;
gint indicator_size, indicator_spacing;
gint baseline;
state = get_button_state (model_button);
context = gtk_widget_get_style_context (widget);
gtk_style_context_save (context);
gtk_style_context_set_state (context, state);
if (model_button->iconic)
{
GTK_WIDGET_CLASS (gtk_model_button_parent_class)->draw (widget, cr);
goto out;
}
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
baseline = gtk_widget_get_allocated_baseline (widget);
gtk_icon_size_lookup (GTK_ICON_SIZE_MENU, &indicator_size, NULL);
indicator_spacing = indicator_size / 8;
x = width - border_width - indicator_spacing - indicator_size;
if (indicator_is_left (widget))
x = width - (indicator_size + x);
if (baseline == -1)
y = (height - indicator_size) / 2;
else
y = CLAMP (baseline - indicator_size * button->priv->baseline_align,
0, height - indicator_size);
gtk_render_background (context, cr,
border_width, border_width,
width - 2 * border_width,
height - 2 * border_width);
gtk_render_frame (context, cr,
border_width, border_width,
width - 2 * border_width,
height - 2 * border_width);
if (model_button->has_submenu)
{
state = state & ~(GTK_STATE_FLAG_DIR_LTR|GTK_STATE_FLAG_DIR_RTL);
if (indicator_is_left (widget))
state = state | GTK_STATE_FLAG_DIR_RTL;
else
state = state | GTK_STATE_FLAG_DIR_LTR;
gtk_style_context_set_state (context, state);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_EXPANDER);
gtk_render_expander (context, cr, x, y, indicator_size, indicator_size);
}
else if (model_button->role == GTK_MENU_TRACKER_ITEM_ROLE_CHECK)
{
gtk_style_context_add_class (context, GTK_STYLE_CLASS_CHECK);
gtk_render_check (context, cr, x, y, indicator_size, indicator_size);
}
else if (model_button->role == GTK_MENU_TRACKER_ITEM_ROLE_RADIO)
{
gtk_style_context_add_class (context, GTK_STYLE_CLASS_RADIO);
gtk_render_option (context, cr, x, y, indicator_size, indicator_size);
}
if (gtk_widget_has_visible_focus (widget))
{
GtkBorder border;
gtk_style_context_get_border (context, state, &border);
gtk_render_focus (context, cr,
border_width + border.left,
border_width + border.top,
width - 2 * border_width - border.left - border.right,
height - 2 * border_width - border.top - border.bottom);
}
child = gtk_bin_get_child (GTK_BIN (widget));
if (child)
gtk_container_propagate_draw (GTK_CONTAINER (widget), child, cr);
out:
gtk_style_context_restore (context);
return FALSE;
}
static void
gtk_model_button_pressed (GtkButton *button)
{
GTK_BUTTON_CLASS (gtk_model_button_parent_class)->pressed (button);
gtk_model_button_update_state (GTK_MODEL_BUTTON (button));
}
static void
gtk_model_button_released (GtkButton *button)
{
GTK_BUTTON_CLASS (gtk_model_button_parent_class)->released (button);
gtk_model_button_update_state (GTK_MODEL_BUTTON (button));
}
static void
gtk_model_button_enter_leave (GtkButton *button)
{
gtk_model_button_update_state (GTK_MODEL_BUTTON (button));
gtk_widget_queue_draw (GTK_WIDGET (button));
}
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->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;
button_class->pressed = gtk_model_button_pressed;
button_class->released = gtk_model_button_released;
button_class->enter = gtk_model_button_enter_leave;
button_class->leave = gtk_model_button_enter_leave;
g_object_class_install_property (object_class, PROP_ACTION_ROLE,
g_param_spec_enum ("action-role", "", "",
GTK_TYPE_MENU_TRACKER_ITEM_ROLE,
GTK_MENU_TRACKER_ITEM_ROLE_NORMAL,
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_ICON,
g_param_spec_object ("icon", "", "", G_TYPE_ICON,
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_TEXT,
g_param_spec_string ("text", "", "", NULL,
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_TOGGLED,
g_param_spec_boolean ("toggled", "", "", FALSE,
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_ACCEL,
g_param_spec_string ("accel", "", "", NULL,
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_HAS_SUBMENU,
g_param_spec_boolean ("has-submenu", "", "", FALSE,
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_INVERTED,
g_param_spec_boolean ("inverted", "", "", FALSE,
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_CENTERED,
g_param_spec_boolean ("centered", "", "", FALSE,
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_ICONIC,
g_param_spec_boolean ("iconic", "", "", TRUE,
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
gtk_widget_class_set_accessible_role (GTK_WIDGET_CLASS (class), ATK_ROLE_PUSH_BUTTON);
}
static void
gtk_model_button_init (GtkModelButton *button)
{
gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
button->box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
g_object_set (button->box,
"margin-start", 12,
"margin-end", 12,
"margin-top", 3,
"margin-bottom", 3,
NULL);
gtk_widget_set_halign (button->box, GTK_ALIGN_FILL);
gtk_widget_show (button->box);
button->image = gtk_image_new ();
g_object_set (button->image, "margin", 4, NULL);
button->label = gtk_label_new ("");
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);
gtk_style_context_add_class (gtk_widget_get_style_context (GTK_WIDGET (button)),
GTK_STYLE_CLASS_MENUITEM);
}
GtkWidget *
gtk_model_button_new (void)
{
return g_object_new (GTK_TYPE_MODEL_BUTTON, NULL);
}
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