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annotate semicongine/platform/windows/window.nim @ 968:9d362151c78f

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add: console for windows debug builds
author sam <sam@basx.dev>
date Wed, 03 Apr 2024 02:59:21 -0700
parents fe48b091e83f
children 967b8fa81b6b
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1 import std/options
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2 import winim
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3
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4 import ../../core/vector
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5 import ../../core/buildconfig
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6 import ./virtualkey_map
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7 import ../../events
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8
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9 type
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10 NativeWindow* = object
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11 hinstance*: HINSTANCE
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12 hwnd*: HWND
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13 g_wpPrev: WINDOWPLACEMENT
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14
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15
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16 # sorry, have to use module-global variable to capture windows events
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17 var currentEvents: seq[Event]
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18
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19 template checkWin32Result*(call: untyped) =
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20 let value = call
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21 if value == 0:
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22 raise newException(Exception, "Win32 error: " & astToStr(call) & " returned " & $value)
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23
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24
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25 proc MapLeftRightKeys(key: INT, lparam: LPARAM): INT =
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26 case key
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27 of VK_SHIFT:
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28 MapVirtualKey(UINT((lParam and 0x00ff0000) shr 16), MAPVK_VSC_TO_VK_EX)
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29 of VK_CONTROL:
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30 if (lParam and 0x01000000) == 0: VK_LCONTROL else: VK_RCONTROL
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31 of VK_MENU:
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32 if (lParam and 0x01000000) == 0: VK_LMENU else: VK_RMENU
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33 else:
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34 key
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35
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36 proc WindowHandler(hwnd: HWND, uMsg: UINT, wParam: WPARAM, lParam: LPARAM): LRESULT {.stdcall.} =
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37 case uMsg
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38 of WM_DESTROY:
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39 currentEvents.add(Event(eventType: events.EventType.Quit))
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40 of WM_KEYDOWN, WM_SYSKEYDOWN:
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41 let key = MapLeftRightKeys(INT(wParam), lParam)
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42 currentEvents.add(Event(eventType: KeyPressed, key: KeyTypeMap.getOrDefault(key, Key.UNKNOWN)))
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43 of WM_KEYUP, WM_SYSKEYUP:
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44 let key = MapLeftRightKeys(INT(wParam), lParam)
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45 currentEvents.add(Event(eventType: KeyReleased, key: KeyTypeMap.getOrDefault(key, Key.UNKNOWN)))
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46 of WM_LBUTTONDOWN:
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47 currentEvents.add(Event(eventType: MousePressed, button: MouseButton.Mouse1))
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48 of WM_LBUTTONUP:
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49 currentEvents.add(Event(eventType: MouseReleased, button: MouseButton.Mouse1))
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50 of WM_MBUTTONDOWN:
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51 currentEvents.add(Event(eventType: MousePressed, button: MouseButton.Mouse2))
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52 of WM_MBUTTONUP:
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53 currentEvents.add(Event(eventType: MouseReleased, button: MouseButton.Mouse2))
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54 of WM_RBUTTONDOWN:
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55 currentEvents.add(Event(eventType: MousePressed, button: MouseButton.Mouse3))
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56 of WM_RBUTTONUP:
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57 currentEvents.add(Event(eventType: MouseReleased, button: MouseButton.Mouse3))
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58 of WM_MOUSEMOVE:
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59 currentEvents.add(Event(eventType: events.MouseMoved, x: GET_X_LPARAM(lParam), y: GET_Y_LPARAM(lParam)))
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60 of WM_MOUSEWHEEL:
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61 currentEvents.add(Event(eventType: events.MouseWheel, amount: float32(GET_WHEEL_DELTA_WPARAM(wParam)) / WHEEL_DELTA))
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62 else:
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63 return DefWindowProc(hwnd, uMsg, wParam, lParam)
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64
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65
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66 proc createWindow*(title: string): NativeWindow =
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67 when DEBUG:
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68 AllocConsole()
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69 discard stdin.reopen("conIN$", fmRead)
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70 discard stdout.reopen("conOUT$", fmWrite)
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71 discard stderr.reopen("conOUT$", fmWrite)
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72
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73 result.hInstance = HINSTANCE(GetModuleHandle(nil))
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74 var
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75 windowClassName = T"EngineWindowClass"
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76 windowName = T(title)
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77 windowClass = WNDCLASSEX(
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78 cbSize: UINT(WNDCLASSEX.sizeof),
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79 lpfnWndProc: WindowHandler,
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80 hInstance: result.hInstance,
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81 lpszClassName: windowClassName,
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82 hcursor: LoadCursor(HINSTANCE(0), IDC_ARROW),
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83 )
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84
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85 if(RegisterClassEx(addr(windowClass)) == 0):
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86 raise newException(Exception, "Unable to register window class")
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87
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88 result.hwnd = CreateWindowEx(
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89 DWORD(0),
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90 windowClassName,
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91 windowName,
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92 DWORD(WS_OVERLAPPEDWINDOW),
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93 CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
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94 HMENU(0),
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95 HINSTANCE(0),
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96 result.hInstance,
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97 nil
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98 )
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99
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100 result.g_wpPrev.length = UINT(sizeof(WINDOWPLACEMENT))
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101 discard result.hwnd.ShowWindow(SW_SHOW)
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102
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103 proc setTitle*(window: NativeWindow, title: string) =
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104 window.hwnd.SetWindowText(T(title))
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105
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106 # inspired by the one and only, Raymond Chen
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107 # https://devblogs.microsoft.com/oldnewthing/20100412-00/?p=14353
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108 proc fullscreen*(window: var NativeWindow, enable: bool) =
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109 let dwStyle: DWORD = GetWindowLong(window.hwnd, GWL_STYLE)
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110 if enable:
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111 var mi = MONITORINFO(cbSize: DWORD(sizeof(MONITORINFO)))
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112 if GetWindowPlacement(window.hwnd, addr window.g_wpPrev) and GetMonitorInfo(MonitorFromWindow(window.hwnd, MONITOR_DEFAULTTOPRIMARY), addr mi):
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113 SetWindowLong(window.hwnd, GWL_STYLE, dwStyle and (not WS_OVERLAPPEDWINDOW))
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114 SetWindowPos(window.hwnd, HWND_TOP, mi.rcMonitor.left, mi.rcMonitor.top, mi.rcMonitor.right - mi.rcMonitor.left, mi.rcMonitor.bottom - mi.rcMonitor.top, SWP_NOOWNERZORDER or SWP_FRAMECHANGED)
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115 else:
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116 SetWindowLong(window.hwnd, GWL_STYLE, dwStyle or WS_OVERLAPPEDWINDOW)
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117 SetWindowPlacement(window.hwnd, addr window.g_wpPrev)
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118 SetWindowPos(window.hwnd, HWND(0), 0, 0, 0, 0, SWP_NOMOVE or SWP_NOSIZE or SWP_NOZORDER or SWP_NOOWNERZORDER or SWP_FRAMECHANGED)
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119
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120 proc hideSystemCursor*(window: NativeWindow) =
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121 discard ShowCursor(false)
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122
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123 proc showSystemCursor*(window: NativeWindow) =
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124 discard ShowCursor(true)
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125
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126 proc destroy*(window: NativeWindow) =
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127 discard
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128
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129 proc size*(window: NativeWindow): (int, int) =
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130 var rect: RECT
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131 checkWin32Result GetWindowRect(window.hwnd, addr(rect))
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132 (int(rect.right - rect.left), int(rect.bottom - rect.top))
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133
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134 proc pendingEvents*(window: NativeWindow): seq[Event] =
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135 # empty queue
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136 currentEvents = newSeq[Event]()
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137 var msg: MSG
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138 # fill queue
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139 while PeekMessage(addr(msg), window.hwnd, 0, 0, PM_REMOVE):
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140 TranslateMessage(addr(msg))
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141 DispatchMessage(addr(msg))
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142 return currentEvents
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143
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144 proc getMousePosition*(window: NativeWindow): Option[Vec2f] =
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145 var p: POINT
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146 let res = GetCursorPos(addr(p))
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147 if res:
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148 return some(Vec2f([float32(p.x), float32(p.y)]))
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149 return none(Vec2f)