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application.d
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application.d
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/**
* Module for core application handling.
*
* Authors:
* Jacob Jensen
* License:
* https://github.com/PoisonEngine/poison-ui/blob/master/LICENSE
*/
module poison.core.application;
import std.concurrency : thisTid;
import core.thread : Thread, dur;
import poison.ui : Window;
import poison.core.threading : _uiTid, receiveMessages;
import poison.core.eventobserver;
import poison.core.eventargs;
/// A wrapper around the core application.
class Application {
private:
/// The running application.
static Application _app;
/// The name of the application.
string _name;
/// Collection of windows.
Window[string] _windows;
/// Windows that can be removed.
string[] _removableWindows;
/// Boolean determining whether the application is cycling or not.
bool _cycling;
/// Boolean determining whether the application is open or not.
bool _open;
public:
/**
* Creates a new application.
* Params:
* name = The name of the application.
*/
this(string name) {
_name = name;
_uiTid = thisTid;
}
@property {
/// Gets the name of the application.
string name() { return _name; }
}
/// Updates all styles for each window.
void updateStyles() {
if (_windows) {
foreach (window; _windows) {
foreach (component; window._windowComponents) {
component.updateStyles();
}
}
}
}
/**
* Adds a window to the application.
* Params:
* window = The window to add.
*/
void add(Window window) {
assert(window !is null);
assert(_windows.get(window.name, null) is null);
_windows[window.name] = window;
foreach (component; window._windowComponents) {
component.updateStyles();
}
}
/**
* Removes a window from the application.
* Params:
* window = The window to remove.
*/
void remove(Window window) {
assert(window !is null);
remove(window.name);
}
/**
* Removes a window from the application.
* Params:
* name = The name of the window to remove.
*/
void remove(string name) {
assert(_windows.get(name, null) !is null);
if (_cycling) {
_removableWindows ~= name;
}
else {
auto windowToRemove = _windows.get(name, null);
if (!windowToRemove) {
return;
}
if (windowToRemove.isOpen) {
windowToRemove.close();
}
_windows.remove(name);
}
}
private:
/// Processes the application.
void process() {
assert(_app !is null);
_open = true;
while (_open) {
_removableWindows = [];
_cycling = true;
receiveMessages();
processWindows();
_cycling = false;
foreach (removableWindow; _removableWindows) {
remove(removableWindow);
}
}
}
/// Processes all windows.
void processWindows() {
_open = false;
foreach (window; _windows) {
if (window.isOpen) {
_open = true;
window.process();
}
}
}
public:
static:
/**
* Initializes a application and then processes it.
* Params:
* application = The application to initialize and process.
*/
void initialize(Application application) {
assert(_app is null);
_app = application;
_app.updateStyles();
EventObserver.fireEventGlobal("applicationStart", EventArgs.empty);
_app.process();
EventObserver.fireEventGlobal("applicationEnd", EventArgs.empty);
}
@property {
/// Gets the app.
Application app() { return _app; }
}
}