本文整理汇总了TypeScript中core/util/canvas.Context2d.save方法的典型用法代码示例。如果您正苦于以下问题：TypeScript Context2d.save方法的具体用法？TypeScript Context2d.save怎么用？TypeScript Context2d.save使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类core/util/canvas.Context2d的用法示例。
在下文中一共展示了Context2d.save方法的10个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的TypeScript代码示例。
示例1: _draw_major_labels
_draw_major_labels(ctx: Context2d, tick_info) {
if (!this.visuals.major_label_text.doit) {
return;
}
const [nx, ny] = this.model._normals();
const image = this.model._computed_image_dimensions();
const [x_offset, y_offset] = [image.width * nx, image.height * ny];
const standoff = (this.model.label_standoff + this.model._tick_extent());
const [x_standoff, y_standoff] = [standoff*nx, standoff*ny];
const [sx, sy] = tick_info.coords.major;
const formatted_labels = tick_info.labels.major;
this.visuals.major_label_text.set_value(ctx);
ctx.save();
ctx.translate(x_offset + x_standoff, y_offset + y_standoff);
for (let i = 0, end = sx.length; i < end; i++) {
ctx.fillText(formatted_labels[i],
Math.round(sx[i]+(nx*this.model.label_standoff)),
Math.round(sy[i]+(ny*this.model.label_standoff)));
}
return ctx.restore();
}示例2: _paint_levels
protected _paint_levels(ctx: Context2d, levels: string[], clip_region?: FrameBox): void {
ctx.save()
if (clip_region != null) {
ctx.beginPath()
ctx.rect.apply(ctx, clip_region)
ctx.clip()
}
const indices: {[key: string]: number} = {}
for (let i = 0; i < this.model.plot.renderers.length; i++) {
const renderer = this.model.plot.renderers[i]
indices[renderer.id] = i
}
const sortKey = (renderer_view: RendererView) => indices[renderer_view.model.id]
for (const level of levels) {
const renderer_views = sortBy(values(this.levels[level]), sortKey)
for (const renderer_view of renderer_views) {
renderer_view.render()
}
}
ctx.restore()
}示例3: _paint_levels
_paint_levels(ctx: Context2d, levels, clip_region = null) {
ctx.save();
if ((clip_region != null) && (this.model.plot.output_backend === "canvas")) {
ctx.beginPath();
ctx.rect.apply(ctx, clip_region);
ctx.clip();
}
const indices = {};
for (let i = 0; i < this.model.plot.renderers.length; i++) {
const renderer = this.model.plot.renderers[i];
indices[renderer.id] = i;
}
const sortKey = renderer_view => indices[renderer_view.model.id];
for (const level of levels) {
const renderer_views = sortBy(values(this.levels[level]), sortKey);
for (const renderer_view of renderer_views) {
renderer_view.render();
}
}
return ctx.restore();
}示例4: _canvas_text
protected _canvas_text(ctx: Context2d, text: string, sx: number, sy: number, angle: number): void {
this.visuals.text.set_value(ctx)
const bbox_dims = this._calculate_bounding_box_dimensions(ctx, text)
ctx.save()
ctx.beginPath()
ctx.translate(sx, sy)
if (angle)
ctx.rotate(angle)
ctx.rect(bbox_dims[0], bbox_dims[1], bbox_dims[2], bbox_dims[3])
if (this.visuals.background_fill.doit) {
this.visuals.background_fill.set_value(ctx)
ctx.fill()
}
if (this.visuals.border_line.doit) {
this.visuals.border_line.set_value(ctx)
ctx.stroke()
}
if (this.visuals.text.doit) {
this.visuals.text.set_value(ctx)
ctx.fillText(text, 0, 0)
}
ctx.restore()
}示例5: _v_canvas_text
_v_canvas_text(ctx: Context2d, i, text, sx, sy, angle) {
this.visuals.text.set_vectorize(ctx, i);
const bbox_dims = this._calculate_bounding_box_dimensions(ctx, text);
ctx.save();
ctx.beginPath();
ctx.translate(sx, sy);
ctx.rotate(angle);
ctx.rect(bbox_dims[0], bbox_dims[1], bbox_dims[2], bbox_dims[3]);
if (this.visuals.background_fill.doit) {
this.visuals.background_fill.set_vectorize(ctx, i);
ctx.fill();
}
if (this.visuals.border_line.doit) {
this.visuals.border_line.set_vectorize(ctx, i);
ctx.stroke();
}
if (this.visuals.text.doit) {
this.visuals.text.set_vectorize(ctx, i);
ctx.fillText(text, 0, 0);
}
return ctx.restore();
}示例6: _draw_title
protected _draw_title(ctx: Context2d): void {
if (!this.visuals.title_text.doit)
return
ctx.save()
this.visuals.title_text.set_value(ctx)
ctx.fillText(this.model.title, 0, -this.model.title_standoff)
ctx.restore()
}示例7: _draw_title
protected _draw_title(ctx: Context2d, bbox: BBox): void {
if (!this.visuals.title_text.doit)
return
ctx.save()
ctx.translate(bbox.x0, bbox.y0 + this.title_height)
this.visuals.title_text.set_value(ctx)
ctx.fillText(this.model.title, this.legend_padding, this.legend_padding-this.model.title_standoff)
ctx.restore()
}示例8: _draw_title
_draw_title(ctx: Context2d) {
if (!this.visuals.title_text.doit) {
return;
}
ctx.save();
this.visuals.title_text.set_value(ctx);
ctx.fillText(this.model.title, 0, -this.model.title_standoff);
return ctx.restore();
}示例9: _render
_render(ctx: Context2d, indices, {sx, sy, _x_offset, _y_offset, _angle, _text}) {
for (const i of indices) {
if (isNaN(sx[i]+sy[i]+_x_offset[i]+_y_offset[i]+_angle[i]) || (_text[i] == null)) {
continue;
}
if (this.visuals.text.doit) {
const text = `${_text[i]}`;
ctx.save();
ctx.translate(sx[i] + _x_offset[i], sy[i] + _y_offset[i]);
ctx.rotate(_angle[i]);
this.visuals.text.set_vectorize(ctx, i);
if (text.indexOf("\n") === -1) {
ctx.fillText(text, 0, 0);
} else {
const lines = text.split("\n");
const font = this.visuals.text.cache_select("font", i);
const {height} = get_text_height(font);
const line_height = this.visuals.text.text_line_height.value()*height;
const block_height = line_height*lines.length;
const baseline = this.visuals.text.cache_select("text_baseline", i);
let y;
switch (baseline) {
case "top": {
y = 0;
break;
}
case "middle": {
y = (-block_height/2) + (line_height/2);
break;
}
case "bottom": {
y = -block_height + line_height;
break;
}
default: {
y = 0;
console.warn(`'${baseline}' baseline not supported with multi line text`);
}
}
for (const line of lines) {
ctx.fillText(line, 0, y);
y += line_height;
}
}
ctx.restore();
}
}
}示例10: _generic_line_legend
_generic_line_legend(ctx: Context2d, x0, x1, y0, y1, index) {
ctx.save();
ctx.beginPath();
ctx.moveTo(x0, (y0 + y1) /2);
ctx.lineTo(x1, (y0 + y1) /2);
if (this.visuals.line.doit) {
this.visuals.line.set_vectorize(ctx, index);
ctx.stroke();
}
return ctx.restore();
}