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[python/viewer] New dedicated widgets manager. (#244)
* [python/viewer] Add new dedicated widgets manager. * [python/viewer] Enable to capture widgets on top of three.js rendering. * [python/viewer] Always capture frames in '.png' format. * [python/viewer] Disable legend if not all robots have colors when replaying trajectories. * [python/viewer] Fix replay when at least one of the trajectories is empty. Co-authored-by: Alexis Duburcq <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,179 @@ | ||
| var widgets = document.getElementById("widgets"); | ||
| var widgetsCanvas; | ||
| var widgetsNeedRender = true; | ||
|
|
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| window.onresize = function(event) { | ||
| widgetsNeedRender = true; | ||
| }; | ||
|
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||
| // ***************** Legend utilities ****************** | ||
|
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| function draggable(el) { | ||
| el.style.cursor = "move"; | ||
| el.style.pointerEvents = "auto"; | ||
| el.style.userSelect = "none"; | ||
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| el.addEventListener("mousedown", function(e) { | ||
| var offsetX = e.clientX - parseInt(window.getComputedStyle(this).left, 10); | ||
| var offsetY = e.clientY - parseInt(window.getComputedStyle(this).top, 10); | ||
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| function mouseMoveHandler(e) { | ||
| el.style.top = (e.clientY - offsetY) + "px"; | ||
| el.style.left = (e.clientX - offsetX) + "px"; | ||
| } | ||
|
|
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| function reset() { | ||
| window.removeEventListener("mousemove", mouseMoveHandler); | ||
| window.removeEventListener("mouseup", reset); | ||
| } | ||
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| window.addEventListener("mousemove", mouseMoveHandler); | ||
| window.addEventListener("mouseup", reset); | ||
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| widgetsNeedRender = true; | ||
| }); | ||
| } | ||
|
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| function createLegend(id) { | ||
| var legend = document.createElement("div"); | ||
| legend.id = id; | ||
| legend.style.position = "fixed"; | ||
| legend.style.top = "20px"; | ||
| legend.style.left = "20px"; | ||
| legend.style.backgroundColor = "rgba(255, 255, 255, 0.9)"; | ||
| legend.style.border = "2px solid"; | ||
| legend.style.borderRadius = "5px"; | ||
| legend.style.borderColor = "Silver"; | ||
| legend.style.padding = "4px 10px 4px 8px"; | ||
| widgets.prepend(legend); | ||
|
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| draggable(legend); | ||
| } | ||
|
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| function setLegendItem(legend, id, text, color) { | ||
| var box = document.createElement("div"); | ||
| box.style.display = "inline-block"; | ||
| box.style.height = "20px"; | ||
| box.style.width = "20px"; | ||
| box.style.margin = "4px 8px 4px 0px"; | ||
| box.style.backgroundColor = color; | ||
|
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||
| var label = document.createElement("span"); | ||
| label.textContent = text; | ||
| label.style.fontFamily = "Dejavu Sans"; | ||
| label.style.textAlign = "center"; | ||
| label.style.alignItems = "center"; | ||
|
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||
| var boxContainer = document.getElementById(id); | ||
| if (boxContainer == null) { | ||
| boxContainer = document.createElement("div"); | ||
| boxContainer.id = id; | ||
| boxContainer.style.display = "flex"; | ||
| boxContainer.style.alignItems = "center"; | ||
| legend.appendChild(boxContainer); | ||
| } | ||
| while (boxContainer.firstChild) { | ||
| boxContainer.removeChild(boxContainer.lastChild); | ||
| } | ||
| boxContainer.appendChild(box); | ||
| boxContainer.appendChild(label); | ||
| } | ||
|
|
||
| function removeLegendItem(legend, id) { | ||
| var elem = document.getElementById(id); | ||
| if (elem !== null) { | ||
| legend = elem.parentNode; | ||
| legend.removeChild(elem); | ||
| if (!legend.childElementCount) | ||
| { | ||
| widgets.removeChild(legend); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function updateLegend(cmd) { | ||
| var legend = document.getElementById("legend"); | ||
| if (legend == null) { | ||
| createLegend("legend"); | ||
| legend = document.getElementById("legend"); | ||
| } | ||
| if (cmd.text) { | ||
| setLegendItem(legend, cmd.id, cmd.text, cmd.color); | ||
| } else { | ||
| removeLegendItem(legend, cmd.id); | ||
| } | ||
| widgetsNeedRender = true; | ||
| } | ||
|
|
||
| // ***************** Logo utilities ****************** | ||
|
|
||
| function createLogo(id) { | ||
| var logo = document.createElement("img"); | ||
| logo.id = id; | ||
| logo.draggable = false; | ||
| logo.style.position = "fixed"; | ||
| logo.style.bottom = "20px"; | ||
| logo.style.left = "20px"; | ||
| widgets.prepend(logo); | ||
| } | ||
|
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| function setLogo(logo, dataURL, width, height) { | ||
| logo.setAttribute('src', 'data:image/png;base64,' + dataURL); | ||
| logo.style.width = width.toString() + "px"; | ||
| logo.style.height = height.toString() + "px"; | ||
| } | ||
|
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| function removeLogo(logo) { | ||
| widgets.removeChild(logo); | ||
| } | ||
|
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| function updateLogo(cmd) { | ||
| var logo = document.getElementById("logo"); | ||
| if (cmd.data) { | ||
| if (logo == null) { | ||
| createLogo("logo"); | ||
| logo = document.getElementById("logo"); | ||
| } | ||
| setLogo(logo, cmd.data, cmd.width, cmd.height); | ||
| } else { | ||
| if (logo !== null) { | ||
| removeLogo(logo); | ||
| } | ||
| } | ||
| widgetsNeedRender = true; | ||
| } | ||
|
|
||
| // **************** Widgets utilities ****************** | ||
|
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| async function getWidgetsCanvas(viewer) { | ||
| if (widgetsNeedRender) { | ||
| viewer.camera.updateProjectionMatrix(); | ||
| viewer.renderer.render(viewer.scene, viewer.camera); | ||
| widgetsCanvas = await html2canvas(widgets, { | ||
| allowTaint: true, | ||
| useCORS: true, | ||
| backgroundColor: "rgba(0,0,0,0)", | ||
| removeContainer: true | ||
| }); | ||
| widgetsNeedRender = false; | ||
| } | ||
| return widgetsCanvas; | ||
| } | ||
|
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| async function captureFrameAndWidgets(viewer) { | ||
| var snapshotCanvas = document.createElement('canvas'); | ||
| var ctx = snapshotCanvas.getContext('2d'); | ||
| ctx.canvas.width = document.documentElement.clientWidth; | ||
| ctx.canvas.height = document.documentElement.clientHeight; | ||
|
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| var widgetsCanvas = await getWidgetsCanvas(viewer); | ||
| viewer.camera.updateProjectionMatrix(); | ||
| viewer.renderer.render(viewer.scene, viewer.camera); | ||
| viewer.animator.after_render(); | ||
| viewer.needs_render = false; | ||
|
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| ctx.drawImage(viewer.renderer.domElement, 0, 0); | ||
| ctx.drawImage(widgetsCanvas, 0, 0); | ||
|
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| return snapshotCanvas; | ||
| } |
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