blob: 4ca512a8d47efbfe04dd96e460fab293b1437896 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
#pragma once
#include <memory>
#define IMGUI_DEFINE_MATH_OPERATORS
#include "imgui.h"
class ViewManager;
// A single screen of the UI, swapped in through the ViewManager.
class View {
public:
virtual ~View() = default;
virtual void Init() {}
virtual void Update() {}
virtual void Render() = 0;
void InternalInit(const std::shared_ptr<ViewManager>& manager) {
// Weak to avoid a cycle: the ViewManager owns the View.
this->mManager = manager;
this->Init();
}
protected:
std::shared_ptr<ViewManager> Manager() const {
return mManager.lock();
}
private:
std::weak_ptr<ViewManager> mManager;
};
// Owns the active View and drives its per-frame Update/Render.
class ViewManager : public std::enable_shared_from_this<ViewManager> {
public:
void SetView(const std::shared_ptr<View>& view) {
mCurrent = view;
if (mCurrent != nullptr) {
mCurrent->InternalInit(shared_from_this());
}
}
const std::shared_ptr<View>& Current() const {
return mCurrent;
}
void Render() {
if (mCurrent != nullptr) {
mCurrent->Update();
mCurrent->Render();
}
}
private:
std::shared_ptr<View> mCurrent = nullptr;
};
|
