nana::gui::drawing
Description
The nana::gui::drawing provides a method to draw something on the widget. It specifies a drawing method and everytime the widget refreshes, the drawing method will be employed.
Model
of
None
Public base classes
None
Typedefs
|
draw_fn_t |
A function object type, wappers a function to draw.
prototype is void(nana::paint::graphics&) |
|
diehard_t |
A handle to a drawing method |
Members
|
drawing(nana::gui::widget& widget) |
Create a drawing object for a
widget |
|
~drawing() |
Destruction |
|
void bitblt(int x, int y, unsigned width, unsigned height, const nana::paint::graphics&
graph, int srcx, int srcy) |
Copy a buffer from graph begin(srcx, srcy) to the position(x, y). |
|
void clear() |
Erases all. |
|
void draw(const draw_fn_t&) |
Draws things that are defined by the object of draw_fn_t. |
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diehard_t draw_diehard(const draw_fn_t&) |
Draws things that are defined by the object of draw_fn_t. The drawing methods defined by the object of draw_fn_t are not deleted when clear() is called. |
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void erase(diehard_t) |
Erases a diehard drawing method. |
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bool empty() const |
Returns true if the drawing object is invalid. |
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void line(int x, int y, int x2, int y2, unsigned color) |
Draws a line from point(x, y) to point(x2, y2) with color. |
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void string(int x, int y, unsigned color, const nana::char_t* text) |
Draws a string of text at (x, y) with specified color. |
|
void rectangle(int x, int y, unsigned width, unsigned height, unsigned color, bool
solid) |
Draws a rectangle. |
C++11 Members
|
void draw(draw_fn_t&&) |
Draws things that are defined by the object of draw_fn_t. |
|
diehard_t draw_diehard(draw_fn_t&&) |
Draws things that are defined by the object of draw_fn_t. The drawing methods defined by the object of draw_fn_t are not deleted when clear() is called. |
Example
Draw a 10 X 10 red rectangle at the point(5, 5).
C++03
#include <nana/gui/wvl.hpp>
void draw_method(nana::paint::graphics& graph)
{
graph.rectangle(nana::rectangle(5, 5, 10, 10), 0xFF0000, true);
}
int main()
{
using namespace nana::gui;
form fm;
drawing dw(fm);
dw.draw(draw_method);
dw.update();
fm.show();
exec();
}
C++11
#include <nana/gui/wvl.hpp>
int main()
{
using namespace nana::gui;
form fm;
drawing dw(fm);
dw.draw([](nana::paint::graphics& graph)
{
graph.rectangle(nana::rectangle(5, 5, 10, 10), 0xFF0000, true);
});
dw.update();
fm.show();
exec();
}
File
nana/gui/wvl.hpp
Notes
None.
See also
None.
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