add the element interface and stack (268fb35c) · Commits · github_fork / Clip

elements/context.h

+10 −1

Original line number	Diff line number	Diff line
		@@ -8,15 +8,24 @@
		* <http://www.gnu.org/licenses/>.
		*/
		#pragma once
		#include <stack>
		#include "element.h"
		#include "elements/plot/plot_config.h"
		#include "graphics/layer.h"

		namespace signaltk {

		struct Context {
		PlotConfig plot_config;
		std::stack<ElementRef> elements;
		Layer frame;
		};

		template <typename T>
		Status stack_head(Context* ctx, T** head);

		template <typename T>
		Status stack_head(const Context& ctx, T const** head);

		} // namespace signaltk

		#include "context_impl.h"

0 → 100644

+35 −0

Original line number	Diff line number	Diff line
		/**
		* This file is part of the "signaltk" project
		* Copyright (c) 2018 Paul Asmuth
		*
		* libstx is free software: you can redistribute it and/or modify it under
		* the terms of the GNU General Public License v3.0. You should have received a
		* copy of the GNU General Public License along with this program. If not, see
		* <http://www.gnu.org/licenses/>.
		*/
		#pragma once

		namespace signaltk {

		template <typename T>
		Status stack_head(Context* ctx, T** head) {
		if (ctx->elements.empty()) {
		return Status::ERROR_INVALID_ELEM;
		}

		head = static_cast<T>(ctx->elements.top().get());
		return OK;
		}

		template <typename T>
		Status stack_head(const Context& ctx, T const** head) {
		if (ctx.elements.empty()) {
		return Status::ERROR_INVALID_ELEM;
		}

		head = static_cast<const T>(ctx.elements.top().get());
		return OK;
		}

		} // namespace signaltk

0 → 100644

+24 −0

Original line number	Diff line number	Diff line
		/**
		* This file is part of the "signaltk" project
		* Copyright (c) 2018 Paul Asmuth
		*
		* libstx is free software: you can redistribute it and/or modify it under
		* the terms of the GNU General Public License v3.0. You should have received a
		* copy of the GNU General Public License along with this program. If not, see
		* <http://www.gnu.org/licenses/>.
		*/
		#pragma once
		#include <memory>

		namespace signaltk {

		struct Element {

		virtual ~Element() = default;

		};

		using ElementRef = std::unique_ptr<Element>;

		} // namespace signaltk

+25 −5

Original line number	Diff line number	Diff line
		@@ -23,6 +23,11 @@ AxisDefinition::AxisDefinition() :
		tick_length_rem(kDefaultTickLengthREM) {}

		Status plot_axis_add(Context* ctx, AxisPosition pos) {
		PlotConfig* elem;
		if (auto rc = stack_head(ctx, &elem); rc) {
		return rc;
		}

		auto axis_config = std::make_unique<AxisDefinition>();
		axis_config->position = pos;

		@@ -41,18 +46,28 @@ Status plot_axis_add(Context* ctx, AxisPosition pos) {
		break;
		}

		ctx->plot_config.axes.emplace_back(std::move(axis_config));
		elem->axes.emplace_back(std::move(axis_config));
		return OK;
		}

		Status plot_axis_addtick(Context* ctx, float offset) {
		auto& axis_config = ctx->plot_config.axes.back();
		PlotConfig* elem;
		if (auto rc = stack_head(ctx, &elem); rc) {
		return rc;
		}

		auto& axis_config = elem->axes.back();
		axis_config->ticks.emplace_back(offset);
		return OK;
		}

		Status plot_axis_addlabel(Context* ctx, float offset, const char* label) {
		auto& axis_config = ctx->plot_config.axes.back();
		PlotConfig* elem;
		if (auto rc = stack_head(ctx, &elem); rc) {
		return rc;
		}

		auto& axis_config = elem->axes.back();
		axis_config->labels.emplace_back(offset, label);
		return OK;
		}
		@@ -168,10 +183,15 @@ Status plot_render_axis_horizontal(
		}

		Status plot_render_axis(Context* ctx, int i) {
		assert(i < ctx->plot_config.axes.size());
		PlotConfig* elem;
		if (auto rc = stack_head(ctx, &elem); rc) {
		return rc;
		}

		assert(i < elem->axes.size());

		int padding = 80;
		const auto& axis = ctx->plot_config.axes[i];
		const auto& axis = elem->axes[i];

		Status rc;
		switch (axis->position) {

+4 −1

Original line number	Diff line number	Diff line
		@@ -11,11 +11,14 @@
		#include "signaltk.h"
		#include "axes.h"
		#include "plot_domain.h"
		#include "elements/element.h"
		#include <memory>

		namespace signaltk {

		struct PlotConfig {
		struct PlotConfig : public Element {
		static constexpr const char* ID = "plot";

		PlotDomain x_domain;
		double x_min;
		double x_max;