ArcGIS Engine Developer Guide

BUILDING APPLICATIONS WITH C++ AND CONTROL WIDGETS
1. In your text editor, start a new file, AddDate.h.
2. In AddData.h, create a new class, AddDateTool, which inherits from
CAoToolBase. Include a public constructor and destructor.
#ifndef __ADD_DATE_H_
#define __ADD_DATE_H_
Since the non-GUI-specific Ao/AoControls.h and
Ao/AoToolBase.h are used, the custom tool, like
the custom events, will work with both GTK and
Motif applications.
// ArcObjects Headers
// Engine
#include
// Controls
#include
// Custom Tool
#include
class AddDateTool : public CAoToolBase
{
public:
AddDateTool();
~AddDateTool();
};
#endif
// #define __ADD_DATE_H_
3. Since you are writing a new tool, it must implement both ICommand and ITool,
both defined in CAoToolBase. In AddDate.h you place the declarations for the
functions supported by ICommand and ITool. For this command to work with
all the different controls, you will use the IHookHelper interface, storing the
hook in a private member variable, m_ipHookHelper. You will also provide
member variables for the tool’s icon and bitmap.
class AddDateTool : public CAoToolBase
{
public:
AddDateTool();
~AddDateTool();
// ICommand
HRESULT get_Enabled(VARIANT_BOOL* Enabled);
HRESULT get_Checked(VARIANT_BOOL* Checked) ;
HRESULT get_Name(BSTR* Name);
HRESULT get_Caption(BSTR* Caption);
HRESULT get_Tooltip(BSTR* Tooltip);
HRESULT get_Message(BSTR* Message);
HRESULT get_Bitmap(OLE_HANDLE* bitmapFile);
HRESULT get_Category(BSTR* categoryName);
HRESULT OnCreate(IDispatch* hook);
HRESULT OnClick();
// ITool
HRESULT get_Cursor(OLE_HANDLE* cursorName);
HRESULT OnMouseDown(LONG Button, LONG Shift, LONG X, LONG Y);
Chapter 6 • Developer scenarios • 393