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◆ main openmsx / src / imgui / ImGuiPlotterViewer.cc
3.9 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#include "ImGuiPlotterViewer.hh"
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#include "Connector.hh"
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#include "ImGuiManager.hh"
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#include "ImGuiUtils.hh"
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#include "MSXMotherBoard.hh"
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#include "Plotter.hh"
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#include "Pluggable.hh"
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#include "PluggingController.hh"
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#include <imgui.h>
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using namespace std::literals;
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namespace openmsx {
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ImGuiPlotterViewer::ImGuiPlotterViewer(ImGuiManager& manager_)
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	: ImGuiPart(manager_)
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{
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}
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void ImGuiPlotterViewer::save(ImGuiTextBuffer& buf)
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{
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  savePersistent(buf, *this, persistentElements);
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}
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void ImGuiPlotterViewer::loadLine(std::string_view name, zstring_view value)
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{
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	loadOnePersistent(name, value, *this, persistentElements);
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}
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void ImGuiPlotterViewer::paint(MSXMotherBoard* motherBoard)
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{
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	if (!show) return;
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	ImGui::SetNextWindowSize({480, 720}, ImGuiCond_FirstUseEver);
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	im::Window("Plotter viewer", &show, [&]{
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		if (!motherBoard) {
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			ImGui::TextUnformatted("No machine present.");
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			return;
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		}
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		// Find MSXPlotter
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		MSXPlotter* plotter = nullptr;
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		const auto& controller = motherBoard->getPluggingController();
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		for (auto* connector : controller.getConnectors()) {
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			if (auto* pluggable = &connector->getPlugged()) {
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				if (auto* p = dynamic_cast<MSXPlotter*>(pluggable)) {
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					plotter = p;
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					break;
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				}
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			}
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		}
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		if (!plotter) {
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			ImGui::TextUnformatted("Plotter not plugged in.");
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			return;
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		}
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		auto* paper = plotter->getPaper();
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		if (!paper) {
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			ImGui::TextUnformatted("Plotter has no paper.");
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			return;
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		}
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		// Calculate available space and aspect ratio
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		const auto& style = ImGui::GetStyle();
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		auto panelHeight = 2.0f * ImGui::GetTextLineHeight() + 4.0f * style.ItemSpacing.y + 2.0f * style.FramePadding.y + 2.0f;
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		auto availableSize = max(ImGui::GetContentRegionAvail() - gl::vec2{0.0f, panelHeight}, gl::vec2{0.0f});
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		auto paperSize = gl::vec2(paper->size());
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		auto scaleVec = availableSize / paperSize;
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		float scale = min_component(scaleVec);
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		auto displaySize = paperSize * scale; // largest fit with same aspect ratio
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		auto screenPos = ImGui::GetCursorScreenPos();
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		auto& texture = paper->updateTexture(max(trunc(displaySize), gl::ivec2{1}));
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		ImGui::Image(texture.getImGui(), displaySize);
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		// Draw crosshair at pen position
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		// MSXPlotter: X-axis is short axis (carriage), Y-axis is long axis (paper feed).
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		// Origin (0,0) is bottom-left of plotting area.
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		auto plotPos = plotter->getPlotterPos();
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		auto paperPos = gl::vec2{MSXPlotter::MARGIN.x, MSXPlotter::FULL_AREA.y - MSXPlotter::MARGIN.y}
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		              + plotPos * gl::vec2{1, -1};
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		auto stepToPixel = paperSize / MSXPlotter::FULL_AREA;
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		auto penScrnPos = screenPos + (paperPos * stepToPixel * scale);
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		auto* drawList = ImGui::GetWindowDrawList();
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		float crossSize = 10.0f;
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		drawList->AddLine(penScrnPos + gl::vec2{-crossSize, 0.0f},
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		                  penScrnPos + gl::vec2{ crossSize, 0.0f}, 0xFF0000FF);
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		drawList->AddLine(penScrnPos + gl::vec2{0.0f, -crossSize},
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		                  penScrnPos + gl::vec2{0.0f,  crossSize}, 0xFF0000FF);
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		ImGui::Separator();
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		auto pen = plotter->getSelectedPen();
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		static constexpr std::array<std::string_view, 4> penNames = {
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			"Black", "Blue", "Green", "Red"
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		};
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		ImGui::StrCat("Pen: ", penNames[pen]);
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		ImGui::SameLine();
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		auto c = gl::vec4{gl::vec3(1.0f) - MSXPlotter::inkColors[pen], 1.0f};
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		ImGui::ColorButton("##pencolor", c, ImGuiColorEditFlags_NoTooltip,
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		                   gl::vec2{ImGui::GetFontSize()});
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		ImGui::SameLine();
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		ImGui::Text("  Pos: (%.1f, %.1f)", double(plotPos.x), double(plotPos.y));
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		ImGui::SameLine();
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		ImGui::StrCat("  Mode: ", plotter->isGraphicMode() ? "Graphic"sv : "Text"sv);
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		ImGui::Separator();
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		if (ImGui::Button("Cycle Pen")) {
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			plotter->cyclePen();
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		}
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		ImGui::SameLine();
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		if (ImGui::Button("Up")) {
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			plotter->moveStep({0.0f, 10.0f});
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		}
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		ImGui::SameLine();
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		if (ImGui::Button("Down")) {
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			plotter->moveStep({0.0f, -10.0f});
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		}
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		ImGui::SameLine();
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		if (ImGui::Button("Eject Paper")) {
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			plotter->ejectPaper();
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		}
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	});
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}
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} // namespace openmsx