xtd 0.2.0
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◆ mouse_enter

event<control, event_handler> xtd::forms::control::mouse_enter

Occurs when the mouse pointer enters the xtd::forms::control.

Remarks
Mouse events occur in the following order:
  1. xtd::forms::control::mouse_enter
  2. xtd::forms::control::mouse_move
  3. xtd::forms::control::mouse_hover / xtd::forms::control::mouse_down / xtd::forms::control::mouse_wheel / xtd::forms::control::mouse_horizontal_wheel
  4. xtd::forms::control::mouse_up
  5. xtd::forms::control::mouse_leave
Note
The following events are not raised for the tab_control class unless there is at least one tab_page in the tab_control::tab_pages collection: xtd::forms::control::click, xtd::forms::control::double_click, xtd::forms::control::mouse_down, xtd::forms::control::mouse_up, xtd::forms::control::mouse_hover, xtd::forms::control::mouse_enter, xtd::forms::control::mouse_leave and xtd::forms::control::mouse_move. If there is at least one tab_page in the collection, and the user interacts with the tab control's header (where the tab_page names appear), the tab_control raises the appropriate event. However, if the user interaction is within the client area of the tab page, the tab_page raises the appropriate event.
Examples
The following code example demonstrates the use of control mouse events.
#define TRACE
#include <xtd/forms/application>
#include <xtd/forms/form>
#include <xtd/forms/trace_form>
#include <xtd/diagnostics/trace>
using namespace xtd;
using namespace xtd::forms;
class form1 : public form {
public:
form1() {
text("Mouse events example");
click += [&] {
};
double_click += [&] {
};
mouse_click += [&](object & sender, const mouse_event_args & e) {
xtd::diagnostics::trace::write_line("mouse_click={{button={}, clicks={}, delta={}, location=[{}], modifier_keys=[{}]}}", e.button(), e.clicks(), e.delta(), e.location(), modifier_keys());
};
mouse_double_click += [&](object & sender, const mouse_event_args & e) {
xtd::diagnostics::trace::write_line("mouse_double_click={{button={}, clicks={}, delta={}, location=[{}], modifier_keys=[{}]}}", e.button(), e.clicks(), e.delta(), e.location(), modifier_keys());
};
mouse_down += [&](object & sender, const mouse_event_args & e) {
xtd::diagnostics::trace::write_line("mouse_down={{button={}, clicks={}, delta={}, location=[{}], modifier_keys=[{}]}}", e.button(), e.clicks(), e.delta(), e.location(), modifier_keys());
};
mouse_enter += [&] {
};
mouse_horizontal_wheel += [&](object & sender, const mouse_event_args & e) {
xtd::diagnostics::trace::write_line("mouse_horizontal_wheel={{button={}, clicks={}, delta={}, location=[{}], modifier_keys=[{}]}}", e.button(), e.clicks(), e.delta(), e.location(), modifier_keys());
};
mouse_leave += [&] {
};
mouse_move += [&](object & sender, const mouse_event_args & e) {
xtd::diagnostics::trace::write_line("mouse_move={{button={}, clicks={}, delta={}, location=[{}], modifier_keys=[{}]}}", e.button(), e.clicks(), e.delta(), e.location(), modifier_keys());
};
mouse_up += [&](object & sender, const mouse_event_args & e) {
xtd::diagnostics::trace::write_line("mouse_up={{button={}, clicks={}, delta={}, location=[{}], modifier_keys=[{}]}}", e.button(), e.clicks(), e.delta(), e.location(), modifier_keys());
};
mouse_wheel += [&](object & sender, const mouse_event_args & e) {
xtd::diagnostics::trace::write_line("mouse_wheel={{button={}, clicks={}, delta={}, location=[{}], modifier_keys=[{}]}}", e.button(), e.clicks(), e.delta(), e.location(), modifier_keys());
};
}
};
auto main() -> int {
application::run(form1 {});
}
static void write_line()
Writes a line terminator to the trace listeners in the listeners collection.
Definition trace.h:358
static void run()
Begins running a standard application message loop on the current thread, without a form.
Represents a window or dialog box that makes up an application's user interface.
Definition form.h:54
Provides data for the xtd::forms::control::mouse_up, xtd::forms::control::mouse_down,...
Definition mouse_event_args.h:34
Represents a form that displays trace form. This class cannot be inherited.
Definition trace_form.h:36
@ e
The E key.
@ text
The xtd::forms::status_bar_panel displays text in the standard font.
The xtd::forms namespace contains classes for creating Windows-based applications that take full adva...
Definition xtd_about_box.h:12
The xtd namespace contains all fundamental classes to access Hardware, Os, System,...
Definition xtd_about_box.h:10
Remarks
For more information about handling events, see Handling and Raising Events.