xtd::forms::cursor Class Reference

Inheritance diagram for xtd::forms::cursor:

Definition

Represents the image used to paint the mouse pointer.

Header

#include <xtd/forms/cursor>

Namespace

xtd::forms

Library

xtd.forms

Remarks

A cursor is a small picture whose location on the screen is controlled by a pointing device, such as a mouse, pen, or trackball. When the user moves the pointing device, the operating system moves the cursor accordingly.

Different cursor shapes are used to inform the user what operation the mouse will have. For example, when editing or selecting text, a cursors::ibeam cursor is typically displayed. A wait cursor is commonly used to inform the user that a process is currently running. Examples of processes you might have the user wait for are opening a file, saving a file, or filling a control such as a data_grid, list_box or tree_view with a large amount of data.

All controls that derive from the Control class have a Cursor property. To change the cursor displayed by the mouse pointer when it is within the bounds of the control, assign a Cursor to the Cursor property of the control. Alternatively, you can display cursors at the application level by assigning a Cursor to the Current property. For example, if the purpose of your application is to edit a text file, you might set the Current property to Cursors.WaitCursor to display a wait cursor over the application while the file loads or saves to prevent any mouse events from being processed. When the process is complete, set the Current property to Cursors.Default for the application to display the appropriate cursor over each control type.

See also

xtd::forms::cursors

Examples

The following code example demonstrates the use of cursor component.

#include <xtd/forms/application>
#include <xtd/forms/cursors>
#include <xtd/forms/form>
#include <xtd/forms/list_box>
#include <xtd/forms/panel>
#include <xtd/drawing/system_colors>
 
using namespace xtd;
using namespace xtd::forms;
 
class form1 : public form {
public:
  form1() {
    text("Cursor example");
    start_position(form_start_position::manual);
    location({200, 200});
    client_size({360, 240});
    
    list_box_loading_indicators.parent(*this);
    list_box_loading_indicators.bounds({20, 20, 150, 200});
    list_box_loading_indicators.anchor(anchor_styles::top | anchor_styles::left | anchor_styles::bottom);
    list_box_loading_indicators.items().push_back_range({{"Default", cursors::default_cursor()}, {"Application Starting", cursors::app_starting()}, {"Arrow", cursors::arrow()}, {"Closed hand", cursors::closed_hand()}, {"Contextual menu", cursors::contextual_menu()}, {"Cell", cursors::cell()}, {"Cross", cursors::cross()}, {"Disappearing item", cursors::disappearing_item()}, {"Drag copy", cursors::drag_copy()}, {"Drag link", cursors::drag_link()}, {"Hand", cursors::hand()}, {"Help", cursors::help()}, {"Horizontal split", cursors::hsplit()}, {"I beam", cursors::ibeam()}, {"No", cursors::no()}, {"No drag", cursors::no_drag()}, {"No move 2d", cursors::no_move_2d()}, {"No move horizontal", cursors::no_move_horiz()}, {"No move vertical", cursors::no_move_vert()}, {"Open hand", cursors::open_hand()}, {"Pan east", cursors::pan_east()}, {"Pan north east", cursors::pan_ne()}, {"Pan north", cursors::pan_north()}, {"Pan north west", cursors::pan_nw()}, {"Pan south east", cursors::pan_se()}, {"Pan south", cursors::pan_south()}, {"Pan south west", cursors::pan_sw()}, {"Pan West", cursors::pan_west()}, {"Size all", cursors::size_all()}, {"Size north-east south-west", cursors::size_nesw()}, {"Size north south", cursors::size_ns()}, {"Size north-west south-east", cursors::size_nwse()}, {"Size west east", cursors::size_we()}, {"Up arrow", cursors::up_arrow()}, {"Vertical I beam", cursors::vibeam()}, {"Vertical split", cursors::vsplit()}, {"Wait", cursors::wait_cursor()}, {"Zoom in", cursors::zoom_in()}, {"Zoom out", cursors::zoom_out()}});
    list_box_loading_indicators.selected_index_changed += [&] {
      loading_indicator_panel.cursor(any_cast<forms::cursor>(list_box_loading_indicators.selected_item().tag()));
    };
    list_box_loading_indicators.selected_item("Default");
    
    loading_indicator_panel.parent(*this);
    loading_indicator_panel.border_style(border_style::fixed_3d);
    loading_indicator_panel.back_color(drawing::system_colors::window());
    loading_indicator_panel.bounds({190, 20, 150, 200});
    loading_indicator_panel.anchor(anchor_styles::top | anchor_styles::left | anchor_styles::bottom | anchor_styles::right);
  }
  
private:
  list_box list_box_loading_indicators;
  panel loading_indicator_panel;
};
 
auto main() -> int {
  application::run(form1 {});
}

Examples

circular_form.cpp.

Public Fields
static cursor	none
	Represent none cursor.

Public Constructors
	cursor ()
	Initializes a new instance of the cursor class.
	cursor (intptr handle)
	Initializes a new instance of the Cursor class from the specified Windows handle.

Public Properties
intptr	handle () const noexcept
	Gets the handle of the cursor.
drawing::point	hot_spot () const noexcept
	Gets the cursor hot spot.
drawing::size	size () const noexcept
	Gets the size of the cursor object.
std::any	tag () const noexcept
	Gets the object that contains data about the control.
void	tag (std::any tag)
	Sets the object that contains data about the control.

Methodds
intptr	copy_handle () const
	Copies the handle of this cursor.
bool	equals (const cursor &value) const noexcept override
xtd::string	to_string () const noexcept override
	Returns a string containing the name of the cursor.
virtual bool	equals (const object &obj) const noexcept
	Determines whether the specified object is equal to the current object.
template<typename object_a_t , typename object_b_t >
static bool	equals (const object_a_t &object_a, const object_b_t &object_b) noexcept
	Determines whether the specified object instances are considered equal.

Public Static Properties
static xtd::forms::cursor	current ()
	Gets a cursor object that represents the mouse cursor.
static void	current (const xtd::forms::cursor &cursor)
	Sets a cursor object that represents the mouse cursor.
static drawing::point	position ()
	Gets the cursor's position.
static void	position (const drawing::point &position)
	Sets the cursor's position.

Static methodds
static cursor	from_bitmap (const xtd::drawing::bitmap &bitmap, const xtd::drawing::point &hot_spot)
	Create a cursor form a specified bitmap with specified hot spot.
static cursor	from_bitmap (const xtd::drawing::bitmap &bitmap)
	Create a cursor form a specified bitmap.
static void	hide ()
	Hides the cursor.
static void	show ()
	Displays the cursor.

Additional Inherited Members
Public Member Functions inherited from xtd::object
	object ()=default
	Create a new instance of the ultimate base class object.
virtual size_t	get_hash_code () const noexcept
	Serves as a hash function for a particular type.
virtual type_object	get_type () const noexcept
	Gets the type of the current instance.
template<typename object_t >
xtd::uptr< object_t >	memberwise_clone () const
	Creates a shallow copy of the current object.
Public Member Functions inherited from xtd::iequatable< cursor >
virtual bool	equals (const cursor &) const noexcept=0
	Indicates whether the current object is equal to another object of the same type.
Static Public Member Functions inherited from xtd::object
template<typename object_a_t , typename object_b_t >
static bool	equals (const object_a_t &object_a, const object_b_t &object_b) noexcept
	Determines whether the specified object instances are considered equal.
template<typename object_a_t , typename object_b_t >
static bool	reference_equals (const object_a_t &object_a, const object_b_t &object_b) noexcept
	Determines whether the specified object instances are the same instance.

Constructor & Destructor Documentation

cursor() [1/2]

xtd::forms::cursor::cursor

(

)

Initializes a new instance of the cursor class.

cursor() [2/2]

xtd::forms::cursor::cursor ( intptr  handle )

explicit

Initializes a new instance of the Cursor class from the specified Windows handle.

Parameters

handle

An IntPtr that represents the Windows handle of the cursor to create.

Remarks

You must free the cursor handle when you are done with it.

Member Function Documentation

handle()

intptr xtd::forms::cursor::handle ( ) const

noexcept

Gets the handle of the cursor.

Returns

An intptr that represents the cursor's handle.

Remarks

This is not a copy of the handle; do not destroy it.

hot_spot()

drawing::point xtd::forms::cursor::hot_spot ( ) const

noexcept

Gets the cursor hot spot.

Returns

A point representing the cursor hot spot.

Remarks

The hot_spot is the point in the cursor that interacts with other elements on the screen.

size()

drawing::size xtd::forms::cursor::size ( ) const

noexcept

Gets the size of the cursor object.

Returns

A size that represents the width and height of the cursor.

tag() [1/2]

std::any xtd::forms::cursor::tag ( ) const

noexcept

Gets the object that contains data about the control.

Returns

A std::any that contains data about the control. The default is empty.

Remarks

Any type of class can be assigned to this property.

tag() [2/2]

void xtd::forms::cursor::tag

(

std::any

tag

)

Sets the object that contains data about the control.

Parameters

tag	A std::any that contains data about the control. The default is empty.

Remarks

Any type of class can be assigned to this property.

current() [1/2]

static xtd::forms::cursor xtd::forms::cursor::current ( )

static

Gets a cursor object that represents the mouse cursor.

Returns

A cursor that represents the mouse cursor. The default is cursor::none.

Remarks

Setting the current property changes the cursor currently displayed. The application may or may not continue to listen for mouse events. To signal that the application should not respond to mouse events during a long-running operation, use the application::use_wait_cursor property. In most cases, however, it's better to use a background thread to manage a long-running operation, and leave your user interface accessible to the user.

current() [2/2]

static void xtd::forms::cursor::current ( const xtd::forms::cursor &  cursor )

static

Sets a cursor object that represents the mouse cursor.

Parameters

cursor

A cursor that represents the mouse cursor. The default is cursor::none.

Remarks

Setting the current property changes the cursor currently displayed. The application may or may not continue to listen for mouse events. To signal that the application should not respond to mouse events during a long-running operation, use the application::use_wait_cursor property. In most cases, however, it's better to use a background thread to manage a long-running operation, and leave your user interface accessible to the user.

position() [1/2]

static drawing::point xtd::forms::cursor::position ( )

static

Gets the cursor's position.

Returns

A point that represents the cursor's position in screen coordinates.

Remarks

The position property is identical to the control::mouse_position property.

position() [2/2]

static void xtd::forms::cursor::position ( const drawing::point &  position )

static

Sets the cursor's position.

Parameters

position

A point that represents the cursor's position in screen coordinates.

Remarks

The position property is identical to the control::mouse_position property.

copy_handle()

intptr xtd::forms::cursor::copy_handle

(

)

const

Copies the handle of this cursor.

Returns

An intptr that represents the cursor's handle.

Remarks

The handle created as a result of calling this method must be deleted of when you are done with it.

to_string()

xtd::string xtd::forms::cursor::to_string ( ) const

overridevirtualnoexcept

Returns a string containing the name of the cursor.

Returns

A string containing the name of the cursor.

Reimplemented from xtd::object.

from_bitmap() [1/2]

static cursor xtd::forms::cursor::from_bitmap ( const xtd::drawing::bitmap &  bitmap, const xtd::drawing::point &  hot_spot  )

static

Create a cursor form a specified bitmap with specified hot spot.

Parameters

bitmap	A xtd::drawing::bitmap image will be use by cursor.
hot_spot	A xtd::drawing::point hot spot location.

Returns

A new cursor instance.

from_bitmap() [2/2]

static cursor xtd::forms::cursor::from_bitmap ( const xtd::drawing::bitmap &  bitmap )

static

Create a cursor form a specified bitmap.

Parameters

bitmap

A xtd::drawing::bitmap image will be use by cursor.

Returns

A new cursor instance.

Remarks

The hot spot location is top left (0, 0).

hide()

static void xtd::forms::cursor::hide ( )

static

Hides the cursor.

The show and hide method calls must be balanced. For every call to the hide method there must be a corresponding call to the show method.

show()

static void xtd::forms::cursor::show ( )

static

Displays the cursor.

The show and hide method calls must be balanced. For every call to the hide method there must be a corresponding call to the show method.

equals() [1/2]

virtual bool xtd::object::equals ( const object &  obj ) const

virtualnoexcept

Determines whether the specified object is equal to the current object.

Parameters

obj	The object to compare with the current object.

Returns

true if the specified object is equal to the current object. otherwise, false.

Examples

The following code example compares the current instance with another object.

#include <xtd/console>
 
using namespace xtd;
 
auto main() -> int {
  auto object1 = new_ptr<object>();
  auto object2 = new_ptr<object>();
  
  auto object3 = object2;
  console::write_line(object1->equals(*object3));
  console::write_line(*object1 == *object3);
  object3 = object1;
  console::write_line(object1->equals(*object3));
  console::write_line(*object1 == *object3);
}
 
// This code produces the following output :
//
// false
// false
// true
// true

Reimplemented from xtd::object.

equals() [2/2]

template<typename object_a_t , typename object_b_t >

static bool xtd::object::equals ( const object_a_t &  object_a, const object_b_t &  object_b  )

inlinestaticnoexcept

Determines whether the specified object instances are considered equal.

Parameters

object_a	The first object to compare.
object_b	The second object to compare.

Returns

true if object_a is the same instance as object_b or if both are null references or if object_a(object_b) returns true. otherwise, false.

Examples

The following code example compares different objects.

#include <xtd/console>
 
using namespace xtd;
 
auto main() -> int {
  string s1 = "Tom";
  string s2 = "Carol";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
  
  s1 = "Tom";
  s2 = "Tom";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
  
  s1 = "";
  s2 = "Tom";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
  
  s1 = "Carol";
  s2 = "";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
  
  s1 = "";
  s2 = "";
  console::write_line("object::equals(\"{0}\", \"{1}\") => {2}", s1, s2, object::equals(s1, s2));
}
 
// This code produces the following output :
//
// object::equals("Tom", "Carol") => false
// object::equals("Tom", "Tom") => true
// object::equals("", "Tom") => false
// object::equals("Carol", "") => false
// object::equals("", "") => true

Member Data Documentation

none

cursor xtd::forms::cursor::none

static

Represent none cursor.

---

The documentation for this class was generated from the following file:

• xtd.forms/include/xtd/forms/cursor.h