85 lines
2.6 KiB
C++
85 lines
2.6 KiB
C++
#pragma once
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#include "Core/IEditorContext.h"
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#include "Viewport/IViewportHostService.h"
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#include <imgui.h>
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#include <string>
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namespace XCEngine {
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namespace Editor {
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struct ViewportPanelContentResult {
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EditorViewportFrame frame;
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ImVec2 availableSize = ImVec2(0.0f, 0.0f);
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ImVec2 itemMin = ImVec2(0.0f, 0.0f);
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ImVec2 itemMax = ImVec2(0.0f, 0.0f);
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bool hasViewportArea = false;
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bool hovered = false;
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bool focused = false;
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};
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inline void DrawViewportStatusMessage(const std::string& message) {
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if (message.empty()) {
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return;
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}
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ImDrawList* drawList = ImGui::GetWindowDrawList();
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if (drawList == nullptr) {
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return;
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}
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const ImVec2 min = ImGui::GetItemRectMin();
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const ImVec2 max = ImGui::GetItemRectMax();
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const ImVec2 textSize = ImGui::CalcTextSize(message.c_str());
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const ImVec2 textPos(
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min.x + ((max.x - min.x) - textSize.x) * 0.5f,
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min.y + ((max.y - min.y) - textSize.y) * 0.5f);
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drawList->AddText(textPos, ImGui::GetColorU32(ImGuiCol_TextDisabled), message.c_str());
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}
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inline ViewportPanelContentResult RenderViewportPanelContent(IEditorContext& context, EditorViewportKind kind) {
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ViewportPanelContentResult result = {};
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result.availableSize = ImGui::GetContentRegionAvail();
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result.focused = ImGui::IsWindowFocused(ImGuiFocusedFlags_RootAndChildWindows);
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IViewportHostService* viewportHostService = context.GetViewportHostService();
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if (result.availableSize.x <= 1.0f || result.availableSize.y <= 1.0f) {
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ImGui::Dummy(ImVec2(0.0f, 0.0f));
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return result;
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}
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result.hasViewportArea = true;
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if (viewportHostService == nullptr) {
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ImGui::Dummy(result.availableSize);
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result.itemMin = ImGui::GetItemRectMin();
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result.itemMax = ImGui::GetItemRectMax();
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result.hovered = ImGui::IsMouseHoveringRect(result.itemMin, result.itemMax, true);
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DrawViewportStatusMessage("Viewport host is unavailable");
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return result;
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}
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result.frame = viewportHostService->RequestViewport(kind, result.availableSize);
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if (result.frame.hasTexture) {
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ImGui::Image(result.frame.textureId, result.availableSize);
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} else {
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ImGui::Dummy(result.availableSize);
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}
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result.itemMin = ImGui::GetItemRectMin();
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result.itemMax = ImGui::GetItemRectMax();
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result.hovered = ImGui::IsMouseHoveringRect(result.itemMin, result.itemMax, true);
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DrawViewportStatusMessage(
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result.frame.statusText.empty() && !result.frame.hasTexture
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? "Viewport is initializing"
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: result.frame.statusText);
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return result;
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}
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} // namespace Editor
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} // namespace XCEngine
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