Mercurial > hg > orthanc-stone
annotate Platforms/Wasm/wasm-viewport.ts @ 327:8716176ff7f0 am-2
added support for arrow keys
| author | am@osimis.io |
|---|---|
| date | Tue, 16 Oct 2018 15:25:21 +0200 |
| parents | 97f16214dc5e |
| children | 8bf717c4e497 |
| rev | line source |
|---|---|
| 230 | 1 var isPendingRedraw = false; |
| 229 | 2 |
| 230 | 3 function ScheduleWebViewportRedraw(cppViewportHandle: any) : void |
| 4 { | |
| 5 if (!isPendingRedraw) { | |
| 6 isPendingRedraw = true; | |
| 7 console.log('Scheduling a refresh of the viewport, as its content changed'); | |
| 8 window.requestAnimationFrame(function() { | |
| 9 isPendingRedraw = false; | |
| 10 Stone.WasmViewport.GetFromCppViewport(cppViewportHandle).Redraw(); | |
| 11 }); | |
| 229 | 12 } |
| 230 | 13 } |
| 226 | 14 |
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15 declare function UTF8ToString(any): string; |
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16 |
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17 function CreateWasmViewport(htmlCanvasId: string) : any { |
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18 var cppViewportHandle = CreateCppViewport(); |
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19 var canvasId = UTF8ToString(htmlCanvasId); |
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20 var webViewport = new Stone.WasmViewport(StoneFrameworkModule, canvasId, cppViewportHandle); // viewports are stored in a static map in WasmViewport -> won't be deleted |
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21 webViewport.Initialize(); |
| 314 | 22 |
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23 return cppViewportHandle; |
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24 } |
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25 |
| 226 | 26 module Stone { |
| 27 | |
| 28 // export declare type InitializationCallback = () => void; | |
| 29 | |
| 30 // export declare var StoneFrameworkModule : any; | |
| 31 | |
| 32 //const ASSETS_FOLDER : string = "assets/lib"; | |
| 33 //const WASM_FILENAME : string = "orthanc-framework"; | |
| 229 | 34 |
| 226 | 35 export class WasmViewport { |
| 36 | |
| 313 | 37 private static viewportsMapByCppHandle_ : Map<number, WasmViewport> = new Map<number, WasmViewport>(); // key = the C++ handle |
| 38 private static viewportsMapByCanvasId_ : Map<string, WasmViewport> = new Map<string, WasmViewport>(); // key = the canvasId | |
| 229 | 39 |
| 226 | 40 private module_ : any; |
| 41 private canvasId_ : string; | |
| 42 private htmlCanvas_ : HTMLCanvasElement; | |
| 43 private context_ : CanvasRenderingContext2D; | |
| 44 private imageData_ : any = null; | |
| 45 private renderingBuffer_ : any = null; | |
| 46 private touchZoom_ : any = false; | |
| 47 private touchTranslation_ : any = false; | |
| 48 | |
| 49 private ViewportSetSize : Function; | |
| 50 private ViewportRender : Function; | |
| 51 private ViewportMouseDown : Function; | |
| 52 private ViewportMouseMove : Function; | |
| 53 private ViewportMouseUp : Function; | |
| 54 private ViewportMouseEnter : Function; | |
| 55 private ViewportMouseLeave : Function; | |
| 56 private ViewportMouseWheel : Function; | |
| 57 private ViewportKeyPressed : Function; | |
| 58 | |
| 227 | 59 private pimpl_ : any; // Private pointer to the underlying WebAssembly C++ object |
| 60 | |
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61 public constructor(module: any, canvasId: string, cppViewport: any) { |
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62 |
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63 this.pimpl_ = cppViewport; |
| 313 | 64 WasmViewport.viewportsMapByCppHandle_[this.pimpl_] = this; |
| 65 WasmViewport.viewportsMapByCanvasId_[canvasId] = this; | |
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66 |
| 226 | 67 this.module_ = module; |
| 68 this.canvasId_ = canvasId; | |
| 69 this.htmlCanvas_ = document.getElementById(this.canvasId_) as HTMLCanvasElement; | |
| 244 | 70 if (this.htmlCanvas_ == null) { |
| 71 console.log("Can not create WasmViewport, did not find the canvas whose id is '", this.canvasId_, "'"); | |
| 72 } | |
| 226 | 73 this.context_ = this.htmlCanvas_.getContext('2d'); |
| 74 | |
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75 this.ViewportSetSize = this.module_.cwrap('ViewportSetSize', null, [ 'number', 'number', 'number' ]); |
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76 this.ViewportRender = this.module_.cwrap('ViewportRender', null, [ 'number', 'number', 'number', 'number' ]); |
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77 this.ViewportMouseDown = this.module_.cwrap('ViewportMouseDown', null, [ 'number', 'number', 'number', 'number', 'number' ]); |
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78 this.ViewportMouseMove = this.module_.cwrap('ViewportMouseMove', null, [ 'number', 'number', 'number' ]); |
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79 this.ViewportMouseUp = this.module_.cwrap('ViewportMouseUp', null, [ 'number' ]); |
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80 this.ViewportMouseEnter = this.module_.cwrap('ViewportMouseEnter', null, [ 'number' ]); |
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81 this.ViewportMouseLeave = this.module_.cwrap('ViewportMouseLeave', null, [ 'number' ]); |
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82 this.ViewportMouseWheel = this.module_.cwrap('ViewportMouseWheel', null, [ 'number', 'number', 'number', 'number', 'number' ]); |
| 327 | 83 this.ViewportKeyPressed = this.module_.cwrap('ViewportKeyPressed', null, [ 'number', 'number', 'string', 'number', 'number' ]); |
| 228 | 84 } |
| 85 | |
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86 public GetCppViewport() : number { |
| 228 | 87 return this.pimpl_; |
| 226 | 88 } |
| 89 | |
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90 public static GetFromCppViewport(cppViewportHandle: number) : WasmViewport { |
| 313 | 91 if (WasmViewport.viewportsMapByCppHandle_[cppViewportHandle] !== undefined) { |
| 92 return WasmViewport.viewportsMapByCppHandle_[cppViewportHandle]; | |
| 93 } | |
| 94 console.log("WasmViewport not found !"); | |
| 95 return undefined; | |
| 96 } | |
| 97 | |
| 98 public static GetFromCanvasId(canvasId: string) : WasmViewport { | |
| 99 if (WasmViewport.viewportsMapByCanvasId_[canvasId] !== undefined) { | |
| 100 return WasmViewport.viewportsMapByCanvasId_[canvasId]; | |
| 229 | 101 } |
| 102 console.log("WasmViewport not found !"); | |
| 103 return undefined; | |
| 104 } | |
| 105 | |
| 314 | 106 public static ResizeAll() { |
| 107 for (let canvasId in WasmViewport.viewportsMapByCanvasId_) { | |
| 108 WasmViewport.viewportsMapByCanvasId_[canvasId].Resize(); | |
| 109 } | |
| 110 } | |
| 111 | |
| 226 | 112 public Redraw() { |
| 113 if (this.imageData_ === null || | |
| 114 this.renderingBuffer_ === null || | |
| 227 | 115 this.ViewportRender(this.pimpl_, |
| 116 this.imageData_.width, | |
| 226 | 117 this.imageData_.height, |
| 118 this.renderingBuffer_) == 0) { | |
| 119 console.log('The rendering has failed'); | |
| 120 } else { | |
| 121 // Create an accessor to the rendering buffer (i.e. create a | |
| 122 // "window" above the heap of the WASM module), then copy it to | |
| 123 // the ImageData object | |
| 124 this.imageData_.data.set(new Uint8ClampedArray( | |
| 125 this.module_.buffer, | |
| 126 this.renderingBuffer_, | |
| 127 this.imageData_.width * this.imageData_.height * 4)); | |
| 128 | |
| 129 this.context_.putImageData(this.imageData_, 0, 0); | |
| 130 } | |
| 131 } | |
| 132 | |
| 133 public Resize() { | |
| 134 if (this.imageData_ != null && | |
| 135 (this.imageData_.width != window.innerWidth || | |
| 136 this.imageData_.height != window.innerHeight)) { | |
| 137 this.imageData_ = null; | |
| 138 } | |
| 139 | |
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140 // width/height can be defined in percent of window width/height through html attributes like data-width-ratio="50" and data-height-ratio="20" |
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141 var widthRatio = Number(this.htmlCanvas_.dataset["widthRatio"]) || 100; |
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142 var heightRatio = Number(this.htmlCanvas_.dataset["heightRatio"]) || 100; |
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143 |
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144 this.htmlCanvas_.width = window.innerWidth * (widthRatio / 100); |
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145 this.htmlCanvas_.height = window.innerHeight * (heightRatio / 100); |
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146 |
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147 console.log("resizing WasmViewport: ", this.htmlCanvas_.width, "x", this.htmlCanvas_.height); |
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148 |
| 226 | 149 if (this.imageData_ === null) { |
| 150 this.imageData_ = this.context_.getImageData(0, 0, this.htmlCanvas_.width, this.htmlCanvas_.height); | |
| 228 | 151 this.ViewportSetSize(this.pimpl_, this.htmlCanvas_.width, this.htmlCanvas_.height); |
| 226 | 152 |
| 153 if (this.renderingBuffer_ != null) { | |
| 154 this.module_._free(this.renderingBuffer_); | |
| 155 } | |
| 156 | |
| 157 this.renderingBuffer_ = this.module_._malloc(this.imageData_.width * this.imageData_.height * 4); | |
| 313 | 158 } else { |
| 159 this.ViewportSetSize(this.pimpl_, this.htmlCanvas_.width, this.htmlCanvas_.height); | |
| 226 | 160 } |
| 161 | |
| 162 this.Redraw(); | |
| 163 } | |
| 164 | |
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165 public Initialize() { |
| 227 | 166 |
| 167 // Force the rendering of the viewport for the first time | |
| 168 this.Resize(); | |
| 226 | 169 |
| 228 | 170 var that : WasmViewport = this; |
| 227 | 171 // Register an event listener to call the Resize() function |
| 172 // each time the window is resized. | |
| 228 | 173 window.addEventListener('resize', function(event) { |
| 174 that.Resize(); | |
| 175 }, false); | |
| 226 | 176 |
| 227 | 177 this.htmlCanvas_.addEventListener('contextmenu', function(event) { |
| 178 // Prevent right click on the canvas | |
| 179 event.preventDefault(); | |
| 180 }, false); | |
| 181 | |
| 182 this.htmlCanvas_.addEventListener('mouseleave', function(event) { | |
| 228 | 183 that.ViewportMouseLeave(that.pimpl_); |
| 227 | 184 }); |
| 185 | |
| 186 this.htmlCanvas_.addEventListener('mouseenter', function(event) { | |
| 228 | 187 that.ViewportMouseEnter(that.pimpl_); |
| 227 | 188 }); |
| 189 | |
| 190 this.htmlCanvas_.addEventListener('mousedown', function(event) { | |
| 191 var x = event.pageX - this.offsetLeft; | |
| 192 var y = event.pageY - this.offsetTop; | |
| 228 | 193 that.ViewportMouseDown(that.pimpl_, event.button, x, y, 0 /* TODO */); |
| 227 | 194 }); |
| 195 | |
| 196 this.htmlCanvas_.addEventListener('mousemove', function(event) { | |
| 197 var x = event.pageX - this.offsetLeft; | |
| 198 var y = event.pageY - this.offsetTop; | |
| 228 | 199 that.ViewportMouseMove(that.pimpl_, x, y); |
| 227 | 200 }); |
| 201 | |
| 202 this.htmlCanvas_.addEventListener('mouseup', function(event) { | |
| 228 | 203 that.ViewportMouseUp(that.pimpl_); |
| 227 | 204 }); |
| 205 | |
| 206 window.addEventListener('keydown', function(event) { | |
| 327 | 207 var keyChar = event.key; |
| 208 var keyCode = event.keyCode | |
| 209 if (keyChar.length == 1) { | |
| 210 keyCode = 0; // maps to OrthancStone::KeyboardKeys_Generic | |
| 211 } else { | |
| 212 keyChar = null; | |
| 213 } | |
| 214 // console.log("key: ", keyCode, keyChar); | |
| 215 that.ViewportKeyPressed(that.pimpl_, keyCode, keyChar, event.shiftKey, event.ctrlKey, event.altKey); | |
| 227 | 216 }); |
| 226 | 217 |
| 227 | 218 this.htmlCanvas_.addEventListener('wheel', function(event) { |
| 219 var x = event.pageX - this.offsetLeft; | |
| 220 var y = event.pageY - this.offsetTop; | |
| 228 | 221 that.ViewportMouseWheel(that.pimpl_, event.deltaY, x, y, event.ctrlKey); |
| 227 | 222 event.preventDefault(); |
| 223 }); | |
| 224 | |
| 225 this.htmlCanvas_.addEventListener('touchstart', function(event) { | |
| 226 that.ResetTouch(); | |
| 227 }); | |
| 228 | |
| 229 this.htmlCanvas_.addEventListener('touchend', function(event) { | |
| 230 that.ResetTouch(); | |
| 231 }); | |
| 232 | |
| 233 this.htmlCanvas_.addEventListener('touchmove', function(event) { | |
| 234 if (that.touchTranslation_.length == 2) { | |
| 235 var t = that.GetTouchTranslation(event); | |
| 228 | 236 that.ViewportMouseMove(that.pimpl_, t[0], t[1]); |
| 227 | 237 } |
| 238 else if (that.touchZoom_.length == 3) { | |
| 226 | 239 var z0 = that.touchZoom_; |
| 227 | 240 var z1 = that.GetTouchZoom(event); |
| 228 | 241 that.ViewportMouseMove(that.pimpl_, z0[0], z0[1] - z0[2] + z1[2]); |
| 227 | 242 } |
| 243 else { | |
| 244 // Realize the gesture event | |
| 245 if (event.targetTouches.length == 1) { | |
| 246 // Exactly one finger inside the canvas => Setup a translation | |
| 247 that.touchTranslation_ = that.GetTouchTranslation(event); | |
| 228 | 248 that.ViewportMouseDown(that.pimpl_, |
| 249 1 /* middle button */, | |
| 227 | 250 that.touchTranslation_[0], |
| 251 that.touchTranslation_[1], 0); | |
| 252 } else if (event.targetTouches.length == 2) { | |
| 253 // Exactly 2 fingers inside the canvas => Setup a pinch/zoom | |
| 254 that.touchZoom_ = that.GetTouchZoom(event); | |
| 255 var z0 = that.touchZoom_; | |
| 228 | 256 that.ViewportMouseDown(that.pimpl_, |
| 257 2 /* right button */, | |
| 227 | 258 z0[0], |
| 259 z0[1], 0); | |
| 260 } | |
| 261 } | |
| 262 }); | |
| 263 } | |
| 226 | 264 |
| 265 public ResetTouch() { | |
| 227 | 266 if (this.touchTranslation_ || |
| 267 this.touchZoom_) { | |
| 228 | 268 this.ViewportMouseUp(this.pimpl_); |
| 226 | 269 } |
| 227 | 270 |
| 271 this.touchTranslation_ = false; | |
| 272 this.touchZoom_ = false; | |
| 273 } | |
| 226 | 274 |
| 275 public GetTouchTranslation(event) { | |
| 227 | 276 var touch = event.targetTouches[0]; |
| 277 return [ | |
| 278 touch.pageX, | |
| 279 touch.pageY | |
| 280 ]; | |
| 281 } | |
| 226 | 282 |
| 283 public GetTouchZoom(event) { | |
| 227 | 284 var touch1 = event.targetTouches[0]; |
| 285 var touch2 = event.targetTouches[1]; | |
| 286 var dx = (touch1.pageX - touch2.pageX); | |
| 287 var dy = (touch1.pageY - touch2.pageY); | |
| 288 var d = Math.sqrt(dx * dx + dy * dy); | |
| 289 return [ | |
| 290 (touch1.pageX + touch2.pageX) / 2.0, | |
| 291 (touch1.pageY + touch2.pageY) / 2.0, | |
| 292 d | |
| 293 ]; | |
| 294 } | |
| 226 | 295 |
| 227 | 296 } |
| 226 | 297 } |
| 298 |