showit.vala

//!valac --pkg gtk+-3.0 --pkg posix  %
/*⭕ rpmbuild -ba showit.spec */
/*⭕ sudo dnf reinstall '/home/eexpss/rpmbuild/RPMS/x86_64/showit-0.6.0-linux.x86_64.rpm' */
/*⭕ showit*/

using Gtk;
using Cairo;
using Posix;
	
public class ShowIt : Gtk.Window {
	private const Gtk.TargetEntry[] targets={{"text/uri-list",0,0}};
/*    string path="";*/
//----------------------------
	public ShowIt() {
		title = "ShowIt";
		decorated = false;
		app_paintable = true;
		set_visual(this.get_screen().get_rgba_visual());
		set_keep_above (true);
		var img = new ImageSurface.from_png("/usr/share/pixmaps/showit.png");
		set_size_request(img.get_width(),img.get_height());
/*        path=GLib.Environment.get_current_dir();*/
		destroy.connect (Gtk.main_quit);
		draw.connect ((da,ctx) => {
			ctx.set_operator (Cairo.Operator.SOURCE);
			ctx.set_source_surface(img,0,0);
			ctx.paint (); return true;
			});
//----------------------------Drag&Drop
		Gtk.drag_dest_set (this,Gtk.DestDefaults.ALL, targets, Gdk.DragAction.COPY);
		drag_data_received.connect((drag_context,x, y,data,info,time) => {
			foreach(string uri in data.get_uris ()){
				string mime;
				try{
					mime=File.new_for_uri(uri).query_info ("standard::content-type", 0, null).get_content_type();	// image/png image/svg+xml
				} catch (GLib.Error e) {error ("%s", e.message);}
				string str=Uri.unescape_string(uri.replace("file://",""));
				GLib.stdout.printf("filename: \"%s\". mimetype: \"%s\"\n",str, mime);
				if(mime!="image/png" && mime!="image/svg+xml")continue;
				callshow(str);
	//-------------------
			}
			Gtk.drag_finish (drag_context, true, false, time);
		});
//----------------------------------------------------
//鼠标点击事件
		button_press_event.connect ((e) => {
			if(e.button == 1){
begin_move_drag ((int)e.button, (int)e.x_root, (int)e.y_root, e.time);
			} else if(e.button == 2){	//鼠标中键显示选中的文字，相当于平时的粘贴。
				Gtk.Clipboard clipboard = Gtk.Clipboard.get(Gdk.SELECTION_PRIMARY);
				string text=clipboard.wait_for_text();
				callshow(text);
			} else {Gtk.main_quit();}
			return true;
		});
	}
//--------------------------------------------------------
	private void callshow(string instr){
/*    try {*/
/*        string[] spawn_args = {"showsvgpngtxt", instr};*/
/*        string[] spawn_env = Environ.get ();*/
/*        Pid child_pid;*/
/*        int standard_input; int standard_output; int standard_error;*/

/*        Process.spawn_async_with_pipes ("/", spawn_args, spawn_env, SpawnFlags.SEARCH_PATH | SpawnFlags.DO_NOT_REAP_CHILD, null, out child_pid, out standard_input, out standard_output, out standard_error);*/

/*        ChildWatch.add (child_pid, (pid, status) => {*/
/*            Process.close_pid (pid);*/
/*        });*/
/*    } catch (SpawnError e) { print ("Error: %s\n", e.message); }*/
		Posix.system("showsvgpngtxt "+instr+" &");
	}
}
//--------------------------------------------------------
int main (string[] args) {
		Gtk.init(ref args);
		var DW = new ShowIt(); DW.show_all();
		Posix.system("xdg-open /usr/share/showit/ &");
		Gtk.main(); return 0;
}
//--------------------------------------------------------