Fix Qt6 deprecated APIs: QCheckBox::checkStateChanged, ExploratoryLocationViewshed

- Replace QCheckBox::stateChanged with checkStateChanged in:
  - lts_dialog.cpp
  - simple_esri_layer.cpp (2 occurrences)
  - layer_control_widget.cpp
  - symbol_dialog.cpp
- Replace LocationViewshed with ExploratoryLocationViewshed (ArcGIS SDK v300):
  - viewshed_analysis.h/.cpp
  - ViewshedLocation.h/.cpp
  - function_dialog.cpp (include)
- Update ViewshedLocation member variable type to ExploratoryLocationViewshed

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-legatus/external/include/KF6/KTextTemplate/ktexttemplate/parser.h

@@ -0,0 +1,132 @@
+/*
+  This file is part of the KTextTemplate library
+
+  SPDX-FileCopyrightText: 2009, 2010 Stephen Kelly <steveire@gmail.com>
+
+  SPDX-License-Identifier: LGPL-2.1-or-later
+
+*/
+
+#ifndef KTEXTTEMPLATE_PARSER_H
+#define KTEXTTEMPLATE_PARSER_H
+
+#include "filter.h"
+#include "node.h"
+#include "token.h"
+
+#include <QStringList>
+
+namespace KTextTemplate
+{
+class TemplateImpl;
+
+class ParserPrivate;
+
+/// @headerfile parser.h <KTextTemplate/Parser>
+
+/**
+  @brief The **%Parser** class processes a string template into a tree of nodes.
+
+  For application developers, this class is internal.
+
+  For template tag authors it may be necessary to advance the parser and process
+  contained tags if the tag works in a tag -- endtag fashion.
+
+  @author Stephen Kelly <steveire@gmail.com>
+*/
+class KTEXTTEMPLATE_EXPORT Parser : public QObject
+{
+    Q_OBJECT
+public:
+    /**
+      Constructor.
+
+      Initialises the **%Parser** with the @p tokenList.
+    */
+    Parser(const QList<Token> &tokenList, QObject *parent);
+
+    /**
+      Destructor.
+    */
+    ~Parser() override;
+
+    /**
+      Advance the parser, using @p parent as the parent of new Nodes. The parser
+      will stop if it encounters a tag which is contained in the list @p stopAt.
+
+      For example, the @gr_tag{if} tag would stopAt both @gr_tag{endif} and
+      @gr_tag{else} tags.
+
+      @see AbstractNodeFactory::getNode
+    */
+    NodeList parse(Node *parent, const QStringList &stopAt = {});
+
+    /**
+      This is an overloaded method.
+      @see parse.
+    */
+    NodeList parse(TemplateImpl *parent, const QStringList &stopAt = {});
+
+    /**
+      This is an overloaded method.
+      @see parse.
+    */
+    NodeList parse(Node *parent, const QString &stopAt);
+
+    /**
+      Returns the filter object called @p name or an invalid object if no filter
+      with that name is loaded.
+    */
+    QSharedPointer<Filter> getFilter(const QString &name) const;
+
+    /**
+      Advances the parser to the tag @p tag. This method is similar to @ref parse,
+      but it does not create nodes for tags encountered.
+    */
+    void skipPast(const QString &tag);
+
+    /**
+      Returns the next token to be processed by the parser. This can be examined
+      in template tag implementations to determine why parsing stopped.
+
+      For example, if the @gr_tag{if} tag, parsing may stop at an @gr_tag{else}
+      tag, in which case parsing should be restarted, or it could stop at an
+      @gr_tag{endif} tag, in which case parsing is finished for that node.
+    */
+    Token takeNextToken();
+
+    /**
+      Returns whether the parser has another token to process.
+    */
+    bool hasNextToken() const;
+
+    /**
+      Deletes the next token available to the parser.
+    */
+    void removeNextToken();
+
+    void invalidBlockTag(const Token &token, const QString &command, const QStringList &stopAt = {});
+
+#ifndef K_DOXYGEN
+    /**
+      @internal
+
+      Used by the @gr_tag{load} tag to load libraries.
+    */
+    void loadLib(const QString &name);
+#endif
+
+protected:
+    /**
+      Puts the token @p token to the front of the list to be processed by the
+      parser.
+    */
+    void prependToken(const Token &token);
+
+private:
+    Q_DECLARE_PRIVATE(Parser)
+    ParserPrivate *const d_ptr;
+};
+}
+
+#endif