Method ShowThumbnailViewDialog

Src/ThumbnailView.cpp:101–256

void Viewer::ShowThumbnailViewDialog(bool* popen)
{
	ImGuiWindowFlags windowFlags = ImGuiWindowFlags_NoScrollbar;
	tVector2 windowPos = Gutil::GetDialogOrigin(Gutil::DialogID::ThumbnailView);

	Config::ProfileData& profile = Config::GetProfileData();
	tVector2 initialSize = Gutil::GetUIParamExtent(tVector2(800.0f, 610.0f), tVector2(1200.0f, 800.0f));

	ImGui::SetNextWindowPos(windowPos, ImGuiCond_FirstUseEver);
	ImGui::SetNextWindowSize(initialSize, ImGuiCond_FirstUseEver);

	if (!ImGui::Begin("Thumbnail View", popen, windowFlags))
	{
		ImGui::End();
		return;
	}

	float barHeight				= Gutil::GetUIParamScaled(4.0f, 2.5f);
	float viewOptionsHeight		= Gutil::GetUIParamScaled(66.0f, 2.5f) + barHeight;
	float optionsHeight			= Gutil::GetUIParamScaled(20.0f, 2.5f) + barHeight;
	float progressTextOffset	= Gutil::GetUIParamScaled(460.0f, 2.5f);
	float thumbItemInfoHeight	= Gutil::GetUIParamScaled(32.0f, 2.5f);
	float minSpacing			= Gutil::GetUIParamScaled(4.0f, 2.5f);

	ImGuiWindowFlags thumbWindowFlags = 0;
	ImGui::BeginChild("Thumbnails", tVector2(ImGui::GetWindowContentRegionWidth(), ImGui::GetWindowHeight()-viewOptionsHeight), false, thumbWindowFlags);

	ImGuiStyle& style = ImGui::GetStyle();
	float visibleW = ImGui::GetWindowPos().x + ImGui::GetWindowContentRegionMax().x;

	float numPerRowF = ImGui::GetWindowContentRegionMax().x / (profile.ThumbnailWidth + minSpacing);
	int numPerRow = tMath::tClampMin(int(numPerRowF), 1);
	float extra = ImGui::GetWindowContentRegionMax().x - (float(numPerRow) * (profile.ThumbnailWidth + minSpacing));
	ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, tVector2(minSpacing + extra/float(numPerRow), minSpacing));
	tVector2 thumbButtonSize(profile.ThumbnailWidth, profile.ThumbnailWidth*9.0f/16.0f);
	int thumbNum = 0;
	int numGeneratedThumbs = 0;
	static int numThumbsWhenSorted = 0;
	
	for (Image* i = Images.First(); i; i = i->Next(), thumbNum++)
	{
		tVector2 cursor = ImGui::GetCursorPos();
		if ((thumbNum % numPerRow) == 0)
			ImGui::SetCursorPos(tVector2(0.5f*extra/float(numPerRow), cursor.y));

		ImGui::PushID(thumbNum);
		ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, tVector2::zero);
		bool isCurr = (i == CurrImage);

		// It's ok to call bind even if a request has not been made yet. Takes no time.
		// Calling bind also frees up the worker threads when requests are fulfilled.
		uint64 thumbnailTexID = i->BindThumbnail();
		if (thumbnailTexID)
			numGeneratedThumbs++;

		// Unlike other widgets, BeginChild ALWAYS needs a corresponding EndChild, even if it's invisible.
		bool visible = ImGui::BeginChild("ThumbItem", thumbButtonSize+tVector2(0.0f, thumbItemInfoHeight), false, ImGuiWindowFlags_NoDecoration);
		int maxNonVisibleThumbThreads = 3;