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#include "widgets/limit-container.h"
//
// FoobarLimitContainer:
//
// A container which uses the natural size requested by the child as its minimum size, but only up to a certain point.
//
// This is useful because gtk_scrolled_window_set_max_content_height doesn't seem to be doing what I understand it to
// do. This way, we can set propagate_natural_height to TRUE and then limit the height through this container.
//
struct _FoobarLimitContainer
{
GtkWidget parent_instance;
GtkWidget* child;
gint max_width;
gint max_height;
};
enum
{
PROP_CHILD = 1,
PROP_MAX_WIDTH,
PROP_MAX_HEIGHT,
N_PROPS,
};
static GParamSpec* props[N_PROPS] = { 0 };
static void foobar_limit_container_class_init ( FoobarLimitContainerClass* klass );
static void foobar_limit_container_init ( FoobarLimitContainer* self );
static void foobar_limit_container_get_property ( GObject* object,
guint prop_id,
GValue* value,
GParamSpec* pspec );
static void foobar_limit_container_set_property ( GObject* object,
guint prop_id,
GValue const* value,
GParamSpec* pspec );
static void foobar_limit_container_dispose ( GObject* object );
static GtkSizeRequestMode foobar_limit_container_get_request_mode( GtkWidget* widget );
static void foobar_limit_container_measure ( GtkWidget* widget,
GtkOrientation orientation,
int for_size,
int* minimum,
int* natural,
int* minimum_baseline,
int* natural_baseline );
static void foobar_limit_container_size_allocate ( GtkWidget* widget,
int width,
int height,
int baseline );
G_DEFINE_FINAL_TYPE( FoobarLimitContainer, foobar_limit_container, GTK_TYPE_WIDGET )
// ---------------------------------------------------------------------------------------------------------------------
// Widget Implementation
// ---------------------------------------------------------------------------------------------------------------------
//
// Static initialization for limit containers.
//
void foobar_limit_container_class_init( FoobarLimitContainerClass* klass )
{
GtkWidgetClass* widget_klass = GTK_WIDGET_CLASS( klass );
widget_klass->get_request_mode = foobar_limit_container_get_request_mode;
widget_klass->measure = foobar_limit_container_measure;
widget_klass->size_allocate = foobar_limit_container_size_allocate;
gtk_widget_class_set_css_name( widget_klass, "limit-container" );
GObjectClass* object_klass = G_OBJECT_CLASS( klass );
object_klass->get_property = foobar_limit_container_get_property;
object_klass->set_property = foobar_limit_container_set_property;
object_klass->dispose = foobar_limit_container_dispose;
props[PROP_CHILD] = g_param_spec_object(
"child",
"Child",
"Child widget for the panel item.",
GTK_TYPE_WIDGET,
G_PARAM_READWRITE );
props[PROP_MAX_WIDTH] = g_param_spec_int(
"max-width",
"Max Width",
"The maximum natural width supported as a minimum size.",
0,
INT_MAX,
0,
G_PARAM_READWRITE );
props[PROP_MAX_HEIGHT] = g_param_spec_int(
"max-height",
"Max Height",
"The maximum natural height supported as a minimum size.",
0,
INT_MAX,
0,
G_PARAM_READWRITE );
g_object_class_install_properties( object_klass, N_PROPS, props );
}
//
// Instance initialization for limit containers.
//
void foobar_limit_container_init( FoobarLimitContainer* self )
{
(void)self;
}
//
// Property getter implementation, mapping a property id to a method.
//
void foobar_limit_container_get_property(
GObject* object,
guint prop_id,
GValue* value,
GParamSpec* pspec )
{
FoobarLimitContainer* self = (FoobarLimitContainer*)object;
switch ( prop_id )
{
case PROP_CHILD:
g_value_set_object( value, foobar_limit_container_get_child( self ) );
break;
case PROP_MAX_WIDTH:
g_value_set_int( value, foobar_limit_container_get_max_width( self ) );
break;
case PROP_MAX_HEIGHT:
g_value_set_int( value, foobar_limit_container_get_max_height( self ) );
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID( object, prop_id, pspec );
break;
}
}
//
// Property setter implementation, mapping a property id to a method.
//
void foobar_limit_container_set_property(
GObject* object,
guint prop_id,
GValue const* value,
GParamSpec* pspec )
{
FoobarLimitContainer* self = (FoobarLimitContainer*)object;
switch ( prop_id )
{
case PROP_CHILD:
foobar_limit_container_set_child( self, g_value_get_object( value ) );
break;
case PROP_MAX_WIDTH:
foobar_limit_container_set_max_width( self, g_value_get_int( value ) );
break;
case PROP_MAX_HEIGHT:
foobar_limit_container_set_max_height( self, g_value_get_int( value ) );
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID( object, prop_id, pspec );
break;
}
}
//
// Instance de-initialization for limit containers.
//
void foobar_limit_container_dispose( GObject* object )
{
FoobarLimitContainer* self = (FoobarLimitContainer*)object;
g_clear_pointer( &self->child, gtk_widget_unparent );
G_OBJECT_CLASS( foobar_limit_container_parent_class )->dispose( object );
}
//
// Determine the size request mode used to measure the widget.
//
// This implementation just forwards the request mode from the child widget.
//
GtkSizeRequestMode foobar_limit_container_get_request_mode( GtkWidget* widget )
{
FoobarLimitContainer* self = (FoobarLimitContainer*)widget;
if ( !self->child ) { return GTK_SIZE_REQUEST_CONSTANT_SIZE; }
return gtk_widget_get_request_mode( self->child );
}
//
// Compute the requested size of the widget.
//
void foobar_limit_container_measure(
GtkWidget* widget,
GtkOrientation orientation,
int for_size,
int* minimum,
int* natural,
int* minimum_baseline,
int* natural_baseline )
{
FoobarLimitContainer* self = (FoobarLimitContainer*)widget;
if ( !self->child )
{
*minimum = 0;
*natural = 0;
*minimum_baseline = 0;
*natural_baseline = 0;
return;
}
gtk_widget_measure( self->child, orientation, for_size, minimum, natural, minimum_baseline, natural_baseline );
gint natural_minimum = *natural;
switch ( orientation )
{
case GTK_ORIENTATION_HORIZONTAL:
natural_minimum = MIN( natural_minimum, self->max_width );
break;
case GTK_ORIENTATION_VERTICAL:
natural_minimum = MIN( natural_minimum, self->max_height );
break;
default:
g_warn_if_reached( );
break;
}
*minimum = MAX( *minimum, natural_minimum );
}
//
// Arrange the child widget.
//
void foobar_limit_container_size_allocate(
GtkWidget* widget,
int width,
int height,
int baseline )
{
FoobarLimitContainer* self = (FoobarLimitContainer*)widget;
if ( !self->child ) { return; }
gtk_widget_allocate( self->child, width, height, baseline, NULL );
}
// ---------------------------------------------------------------------------------------------------------------------
// Public API
// ---------------------------------------------------------------------------------------------------------------------
//
// Create a new limit container instance.
//
GtkWidget* foobar_limit_container_new( void )
{
return g_object_new( FOOBAR_TYPE_LIMIT_CONTAINER, NULL );
}
//
// Get the container's child widget.
//
GtkWidget* foobar_limit_container_get_child( FoobarLimitContainer* self )
{
g_return_val_if_fail( FOOBAR_IS_LIMIT_CONTAINER( self ), NULL );
return self->child;
}
//
// Get the maximum natural width of the child to use as the minimum width for this container.
//
gint foobar_limit_container_get_max_width( FoobarLimitContainer* self )
{
g_return_val_if_fail( FOOBAR_IS_LIMIT_CONTAINER( self ), 0 );
return self->max_width;
}
//
// Get the maximum natural height of the child to use as the minimum height for this container.
//
gint foobar_limit_container_get_max_height( FoobarLimitContainer* self )
{
g_return_val_if_fail( FOOBAR_IS_LIMIT_CONTAINER( self ), 0 );
return self->max_height;
}
//
// Update the container's child widget.
//
void foobar_limit_container_set_child(
FoobarLimitContainer* self,
GtkWidget* child )
{
g_return_if_fail( FOOBAR_IS_LIMIT_CONTAINER( self ) );
g_return_if_fail( child == NULL || self->child == child || gtk_widget_get_parent( child ) == NULL );
if ( self->child != child )
{
g_clear_pointer( &self->child, gtk_widget_unparent );
if ( child )
{
self->child = child;
gtk_widget_set_parent( child, GTK_WIDGET( self ) );
}
g_object_notify_by_pspec( G_OBJECT( self ), props[PROP_CHILD] );
}
}
//
// Update the maximum natural width of the child to use as the minimum width for this container.
//
void foobar_limit_container_set_max_width(
FoobarLimitContainer* self,
gint value )
{
g_return_if_fail( FOOBAR_IS_LIMIT_CONTAINER( self ) );
g_return_if_fail( value >= 0 );
if ( self->max_width != value )
{
self->max_width = value;
gtk_widget_queue_resize( GTK_WIDGET( self ) );
g_object_notify_by_pspec( G_OBJECT( self ), props[PROP_MAX_WIDTH] );
}
}
//
// Update the maximum natural height of the child to use as the minimum height for this container.
//
void foobar_limit_container_set_max_height(
FoobarLimitContainer* self,
gint value )
{
g_return_if_fail( FOOBAR_IS_LIMIT_CONTAINER( self ) );
g_return_if_fail( value >= 0 );
if ( self->max_height != value )
{
self->max_height = value;
gtk_widget_queue_resize( GTK_WIDGET( self ) );
g_object_notify_by_pspec( G_OBJECT( self ), props[PROP_MAX_HEIGHT] );
}
}
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