gala/plugins/pip/SelectionArea.vala
2024-02-24 14:40:18 +01:00

180 lines
4.8 KiB
Vala

//
// Copyright (C) 2017 Santiago León O., Adam Bieńkowski
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
public class Gala.Plugins.PIP.SelectionArea : CanvasActor {
public signal void captured (int x, int y, int width, int height);
public signal void selected (int x, int y);
public signal void closed ();
public Gala.WindowManager wm { get; construct; }
private Gala.ModalProxy? modal_proxy;
private Gdk.Point start_point;
private Gdk.Point end_point;
private bool dragging = false;
private bool clicked = false;
public SelectionArea (Gala.WindowManager wm) {
Object (wm: wm);
}
construct {
start_point = { 0, 0 };
end_point = { 0, 0 };
visible = true;
reactive = true;
int screen_width, screen_height;
wm.get_display ().get_size (out screen_width, out screen_height);
width = screen_width;
height = screen_height;
}
#if HAS_MUTTER45
public override bool key_press_event (Clutter.Event e) {
#else
public override bool key_press_event (Clutter.KeyEvent e) {
#endif
if (e.get_key_symbol () == Clutter.Key.Escape) {
close ();
closed ();
return true;
}
return false;
}
#if HAS_MUTTER45
public override bool button_press_event (Clutter.Event e) {
#else
public override bool button_press_event (Clutter.ButtonEvent e) {
#endif
if (dragging || e.get_button () != Clutter.Button.PRIMARY) {
return true;
}
clicked = true;
float press_x, press_y;
e.get_coords (out press_x, out press_y);
start_point = { (int) press_x, (int) press_y};
return true;
}
#if HAS_MUTTER45
public override bool button_release_event (Clutter.Event e) {
#else
public override bool button_release_event (Clutter.ButtonEvent e) {
#endif
if (e.get_button () != Clutter.Button.PRIMARY) {
return true;
}
if (!dragging) {
float event_x, event_y;
e.get_coords (out event_x, out event_y);
selected ((int) event_x, (int) event_y);
close ();
return true;
}
dragging = false;
clicked = false;
int x, y, w, h;
get_selection_rectangle (out x, out y, out w, out h);
close ();
start_point = { 0, 0 };
end_point = { 0, 0 };
this.hide ();
content.invalidate ();
captured (x, y, w, h);
return true;
}
#if HAS_MUTTER45
public override bool motion_event (Clutter.Event e) {
#else
public override bool motion_event (Clutter.MotionEvent e) {
#endif
if (!clicked) {
return true;
}
float press_x, press_y;
e.get_coords (out press_x, out press_y);
end_point = { (int) press_x, (int) press_y};
content.invalidate ();
if (!dragging) {
dragging = true;
}
return true;
}
public void close () {
wm.get_display ().set_cursor (Meta.Cursor.DEFAULT);
if (modal_proxy != null) {
wm.pop_modal (modal_proxy);
}
}
public void start_selection () {
wm.get_display ().set_cursor (Meta.Cursor.CROSSHAIR);
grab_key_focus ();
modal_proxy = wm.push_modal (this);
}
private void get_selection_rectangle (out int x, out int y, out int width, out int height) {
x = int.min (start_point.x, end_point.x);
y = int.min (start_point.y, end_point.y);
width = (start_point.x - end_point.x).abs ();
height = (start_point.y - end_point.y).abs ();
}
protected override void draw (Cairo.Context ctx, int width, int height) {
ctx.save ();
ctx.set_operator (Cairo.Operator.CLEAR);
ctx.paint ();
ctx.restore ();
if (!dragging) {
return;
}
int x, y, w, h;
get_selection_rectangle (out x, out y, out w, out h);
ctx.rectangle (x, y, w, h);
ctx.set_source_rgba (0.1, 0.1, 0.1, 0.2);
ctx.fill ();
ctx.rectangle (x, y, w, h);
ctx.set_source_rgb (0.7, 0.7, 0.7);
ctx.set_line_width (1.0);
ctx.stroke ();
}
}