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annotate src/zamikongine/platform/windows/win32.nim @ 484:04605ca6dd8a

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add: some comments for assets
author Sam <sam@basx.dev>
date Wed, 11 Jan 2023 00:43:43 +0700
parents 14e5151f68d1
children 85f6b1b29c98
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1 import winim
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2
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3 import ../../events
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4
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5 type
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6 NativeWindow* = object
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7 hinstance*: HINSTANCE
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8 hwnd*: HWND
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9
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10 var currentEvents: seq[Event]
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11
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12 template checkWin32Result*(call: untyped) =
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13 let value = call
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14 if value != 0:
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15 raise newException(Exception, "Win32 error: " & astToStr(call) & " returned " & $value)
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16
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17 proc WindowHandler(hwnd: HWND, uMsg: UINT, wParam: WPARAM, lParam: LPARAM): LRESULT {.stdcall.} =
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18 case uMsg
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19 of WM_DESTROY:
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20 currentEvents.add(Event(eventType: events.EventType.Quit))
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21 else:
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22 return DefWindowProc(hwnd, uMsg, wParam, lParam)
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23
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24
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25 proc createWindow*(title: string): NativeWindow =
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26 result.hInstance = HINSTANCE(GetModuleHandle(nil))
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27 var
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28 windowClassName = T"EngineWindowClass"
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29 windowName = T(title)
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30 windowClass = WNDCLASSEX(
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31 cbSize: UINT(WNDCLASSEX.sizeof),
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32 lpfnWndProc: WindowHandler,
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33 hInstance: result.hInstance,
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34 lpszClassName: windowClassName,
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35 )
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36
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37 if(RegisterClassEx(addr(windowClass)) == 0):
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38 raise newException(Exception, "Unable to register window class")
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39
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40 result.hwnd = CreateWindowEx(
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41 DWORD(0),
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42 windowClassName,
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43 windowName,
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44 DWORD(WS_OVERLAPPEDWINDOW),
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45 CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
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46 HMENU(0),
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47 HINSTANCE(0),
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48 result.hInstance,
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49 nil
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50 )
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51
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52 discard ShowWindow(result.hwnd, 1)
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53
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54 proc trash*(window: NativeWindow) =
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55 discard
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56
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57 proc size*(window: NativeWindow): (int, int) =
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58 var rect: RECT
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59 checkWin32Result GetWindowRect(window.hwnd, addr(rect))
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60 (int(rect.right - rect.left), int(rect.bottom - rect.top))
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61
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62 proc pendingEvents*(window: NativeWindow): seq[Event] =
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63 currentEvents = newSeq[Event]()
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64 var msg: MSG
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65 while PeekMessage(addr(msg), window.hwnd, 0, 0, PM_REMOVE):
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66 DispatchMessage(addr(msg))
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67 return currentEvents