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use std::mem::transmute;
use std::ptr;
use glib::object::{Downcast, IsA};
use glib::signal::connect;
use glib::translate::*;
use glib_ffi::gboolean;
use gdk::{DragAction, Event, ModifierType};
use gdk_ffi;
use pango;
use ffi;
use {
DestDefaults,
Inhibit,
Object,
Rectangle,
TargetEntry,
Widget,
};
pub trait WidgetExtManual {
fn drag_dest_set(&self, flags: DestDefaults, targets: &[TargetEntry], actions: DragAction);
fn drag_source_set(&self, start_button_mask: ModifierType, targets: &[TargetEntry], actions: DragAction);
fn intersect(&self, area: &Rectangle, intersection: Option<&mut Rectangle>) -> bool;
fn override_font(&self, font: &pango::FontDescription);
fn connect_map_event<F: Fn(&Self, &Event) -> Inhibit + 'static>(&self, f: F) -> u64;
fn connect_unmap_event<F: Fn(&Self, &Event) -> Inhibit + 'static>(&self, f: F) -> u64;
}
impl<O: IsA<Widget> + IsA<Object>> WidgetExtManual for O {
fn drag_dest_set(&self, flags: DestDefaults, targets: &[TargetEntry], actions: DragAction) {
let stashes: Vec<_> = targets.iter().map(|e| e.to_glib_none()).collect();
let mut t = Vec::with_capacity(stashes.len());
for stash in &stashes {
unsafe {
t.push(ffi::GtkTargetEntry {
target: (*stash.0).target,
flags: (*stash.0).flags,
info: (*stash.0).info,
});
}
}
let t_ptr: *mut ffi::GtkTargetEntry = if t.len() > 0 {
t.as_ptr() as *mut _
} else {
ptr::null_mut()
};
unsafe { ffi::gtk_drag_dest_set(self.to_glib_none().0,
flags.to_glib(),
t_ptr,
t.len() as i32,
actions.to_glib())};
}
fn drag_source_set(&self, start_button_mask: ModifierType, targets: &[TargetEntry], actions: DragAction) {
let stashes: Vec<_> = targets.iter().map(|e| e.to_glib_none()).collect();
let mut t = Vec::with_capacity(stashes.len());
for stash in &stashes {
unsafe {
t.push(ffi::GtkTargetEntry {
target: (*stash.0).target,
flags: (*stash.0).flags,
info: (*stash.0).info,
});
}
}
let t_ptr: *mut ffi::GtkTargetEntry = if t.len() > 0 {
t.as_ptr() as *mut _
} else {
ptr::null_mut()
};
unsafe { ffi::gtk_drag_source_set(self.to_glib_none().0,
start_button_mask.to_glib(),
t_ptr,
t.len() as i32,
actions.to_glib())};
}
fn intersect(&self, area: &Rectangle, mut intersection: Option<&mut Rectangle>) -> bool {
unsafe {
from_glib(ffi::gtk_widget_intersect(self.to_glib_none().0, area.to_glib_none().0, intersection.to_glib_none_mut().0))
}
}
fn override_font(&self, font: &pango::FontDescription) {
unsafe {
ffi::gtk_widget_override_font(self.to_glib_none().0, font.to_glib_none().0)
}
}
fn connect_map_event<F: Fn(&Self, &Event) -> Inhibit + 'static>(&self, f: F) -> u64 {
unsafe {
let f: Box<Box<Fn(&Self, &Event) -> Inhibit + 'static>> = Box::new(Box::new(f));
connect(self.to_glib_none().0, "map-event",
transmute(event_any_trampoline::<Self> as usize), Box::into_raw(f) as *mut _)
}
}
fn connect_unmap_event<F: Fn(&Self, &Event) -> Inhibit + 'static>(&self, f: F) -> u64 {
unsafe {
let f: Box<Box<Fn(&Self, &Event) -> Inhibit + 'static>> = Box::new(Box::new(f));
connect(self.to_glib_none().0, "unmap-event",
transmute(event_any_trampoline::<Self> as usize), Box::into_raw(f) as *mut _)
}
}
}
unsafe extern "C" fn event_any_trampoline<T>(this: *mut ffi::GtkWidget, event: *mut gdk_ffi::GdkEventAny,
f: &Box<Fn(&T, &Event) -> Inhibit + 'static>) -> gboolean
where T: IsA<Widget> {
callback_guard!();
f(&Widget::from_glib_none(this).downcast_unchecked(), &from_glib_none(event)).to_glib()
}