Picture-in-Picture Windows

1#include <SDL.h>
2#include "Window.h"
3
4class PictureInPicture {
5public:
6  PictureInPicture() {
7    MainWindow.SDLWindow =
8      SDL_CreateWindow("Main Window", 100, 100,
9                       800, 600, 0);
10
11    PiPWindow.SDLWindow = SDL_CreateWindow(
12      "Picture in Picture",
13      // Initially positioned to the right
14      800, 100,
15      200, 150, // Smaller size
16      SDL_WINDOW_ALWAYS_ON_TOP 
17    );
18
19    // Store initial relative position
20    SDL_GetWindowPosition(MainWindow.SDLWindow,
21                          &MainX, &MainY);
22
23    SDL_GetWindowPosition(PiPWindow.SDLWindow,
24                          &PiPX, &PiPY);
25
26    RelativeX = PiPX - MainX;
27    RelativeY = PiPY - MainY;
28  }
29
30  void UpdatePiPPosition() {
31    int CurrentX, CurrentY;
32    SDL_GetWindowPosition(MainWindow.SDLWindow,
33                          &CurrentX, &CurrentY);
34
35    // Move PiP window to maintain relative position
36    SDL_SetWindowPosition(PiPWindow.SDLWindow,
37                          CurrentX + RelativeX,
38                          CurrentY + RelativeY);
39  }
40
41  void HandleEvent(SDL_Event& E) {
42    if (E.type == SDL_WINDOWEVENT) {
43      if (E.window.windowID ==
44        SDL_GetWindowID(MainWindow.SDLWindow)) {
45        if (E.window.event ==
46          SDL_WINDOWEVENT_MOVED) {
47          UpdatePiPPosition();
48        }
49      }
50    }
51  }
52
53  void Update() {
54    MainWindow.Update();
55    PiPWindow.Update();
56  }
57
58private:
59  Window MainWindow;
60  Window PiPWindow;
61  int MainX, MainY;
62  int PiPX, PiPY;
63  int RelativeX, RelativeY;
64};
65
66int main(int argc, char** argv) {
67  SDL_Init(SDL_INIT_VIDEO);
68  PictureInPicture Windows;
69  SDL_Event E;
70
71  while (true) {
72    while (SDL_PollEvent(&E)) {
73      Windows.HandleEvent(E);
74    }
75    Windows.Update();
76  }
77
78  SDL_Quit();
79  return 0;
80}

1#include <SDL.h>
2#include <iostream>
3#include "Window.h"
4
5class PictureInPicture {
6public:
7  PictureInPicture();
8  void UpdatePiPPosition();
9  void HandleEvent(SDL_Event& E);
10  void Update();
11
12private:
13  Window MainWindow;
14  Window PiPWindow;
15  int MainX, MainY;
16  int PiPX, PiPY;
17  int RelativeX, RelativeY;
18  bool IsDragging{false};
19  int DragOffsetX, DragOffsetY;
20
21  void HandleMouseEvent(SDL_Event& E) {
22    if (E.type == SDL_MOUSEBUTTONDOWN) {
23      if (E.button.button == SDL_BUTTON_LEFT &&
24        SDL_GetMouseFocus() == PiPWindow.SDLWindow
25      ) {
26        IsDragging = true;
27
28        int MouseX, MouseY;
29        SDL_GetMouseState(&MouseX, &MouseY);
30
31        int WindowX, WindowY;
32        SDL_GetWindowPosition(
33          PiPWindow.SDLWindow, &WindowX,
34          &WindowY);
35
36        DragOffsetX = MouseX - WindowX;
37        DragOffsetY = MouseY - WindowY;
38      }
39    } else if (E.type == SDL_MOUSEBUTTONUP) {
40      if (E.button.button == SDL_BUTTON_LEFT) {
41        IsDragging = false;
42
43        // Update relative position after drag
44        SDL_GetWindowPosition(
45          MainWindow.SDLWindow, &MainX, &MainY);
46
47        SDL_GetWindowPosition(
48          PiPWindow.SDLWindow, &PiPX, &PiPY);
49
50        RelativeX = PiPX - MainX;
51        RelativeY = PiPY - MainY;
52      }
53    } else if (
54      E.type == SDL_MOUSEMOTION &&
55      IsDragging
56    ) {
57      int MouseX, MouseY;
58      SDL_GetMouseState(&MouseX, &MouseY);
59
60      SDL_SetWindowPosition(
61        PiPWindow.SDLWindow,
62        MouseX - DragOffsetX,
63        MouseY - DragOffsetY
64      );
65    }
66  }
67};
68
69int main(int argc, char** argv) {
70  SDL_Init(SDL_INIT_VIDEO);
71  PictureInPicture Windows;
72  SDL_Event E;
73
74  while (true) {
75    while (SDL_PollEvent(&E)) {
76      Windows.HandleEvent(E);
77    }
78    Windows.Update();
79  }
80
81  SDL_Quit();
82  return 0;
83}