[英]How to create custom shape control in win32 C++
I would like to create a edit box with rounded edges.I cannt use standard edit box control since it would draw rectangular edit box. 我想创建一个带有圆角的编辑框。我不能使用标准的编辑框控件,因为它会绘制矩形的编辑框。
Any suggestions or pointers how to do that? 有什么建议或指示怎么做?
You have a couple of options:- 您有两种选择:
UPDATE 更新
After messing around with a sample program, it gradually dawned on me that sub-classing edit controls doesn't really work and checking on-line confirms this (thankyou MS for being so consistent!). 在弄乱了示例程序之后,我逐渐意识到子类化编辑控件并没有真正起作用,并且在线检查证实了这一点(感谢MS如此一致!)。
So that just leaves option 1 and option 3 (just thought of it): 这样就只剩下选项1和选项3(只需考虑一下):
Here's an example of method 1: 这是方法1的示例:
#include <windows.h>
LRESULT __stdcall EditboxProc (HWND window, unsigned message, WPARAM w_param, LPARAM l_param)
{
bool
use_default = true;
LRESULT
result = 0;
switch (message)
{
case WM_CREATE:
{
RECT
client;
GetClientRect (window, &client);
HWND
edit = CreateWindowEx (0,
TEXT ("Edit"),
0,
WS_VISIBLE | WS_CHILD,
10,
10,
client.right - 20,
client.bottom - 20,
window,
0,
GetModuleHandle (0),
0);
SetWindowLongPtr (window, GWLP_USERDATA, static_cast <LONG> (reinterpret_cast <LONG_PTR> (edit)));
}
break;
case WM_SIZE:
{
RECT
client;
GetClientRect (window, &client);
SetWindowPos (reinterpret_cast <HWND> (static_cast <LONG_PTR> (GetWindowLongPtr (window, GWLP_USERDATA))), 0, 10, 10, client.right - 20, client.bottom - 20, SWP_NOZORDER | SWP_NOOWNERZORDER);
use_default = false;
}
break;
}
return use_default ? DefWindowProc (window, message, w_param, l_param) : result;
}
LRESULT __stdcall WindowProc (HWND window, unsigned message, WPARAM w_param, LPARAM l_param)
{
bool
use_default = true;
LRESULT
result = 0;
switch (message)
{
case WM_CREATE:
{
RECT
client;
GetClientRect (window, &client);
CreateWindowEx (0,
TEXT ("EditboxClass"),
0,
WS_VISIBLE | WS_CHILD,
client.right / 4,
client.bottom / 2 - 20,
client.right / 2,
40,
window,
0,
GetModuleHandle (0),
0);
}
break;
}
return use_default ? DefWindowProc (window, message, w_param, l_param) : result;
}
int __stdcall WinMain (HINSTANCE instance, HINSTANCE prev_instance, LPSTR command_line, int show)
{
WNDCLASSEX
window_class =
{
sizeof window_class,
0,
WindowProc,
0,
0,
instance,
0,
0,
reinterpret_cast <HBRUSH> (static_cast <int> (COLOR_WINDOW) + 1),
0,
TEXT ("WindowClass"),
0
},
editbox_class =
{
sizeof editbox_class,
0,
EditboxProc,
0,
0,
instance,
0,
0,
reinterpret_cast <HBRUSH> (static_cast <int> (COLOR_BTNFACE) + 1),
0,
TEXT ("EditboxClass"),
0
};
if (RegisterClassEx (&window_class) && RegisterClassEx (&editbox_class))
{
HWND
window = CreateWindowEx (0,
TEXT ("WindowClass"),
TEXT ("Demo"),
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
0,
0,
instance,
0);
if (window)
{
MSG
message;
bool
quit = false;
while (!quit)
{
switch (GetMessage (&message, window, 0, 0))
{
case -1:
case 0:
quit = true;
break;
default:
TranslateMessage (&message);
DispatchMessage (&message);
break;
}
}
}
}
return 0;
}
It's a bit bare-bones but should give you some idea about how to do what you want. 这有点毛骨悚然,但是应该让您对如何做自己想要的事情有所了解。 It won't work with dialogs defined using resource scripts (I think, it's been a while since I hand coded a resource) as it uses a custom control for the parent of the edit box (the thing that renders the frame).
它不适用于使用资源脚本定义的对话框(我认为,自从我手工编码资源以来已经有一段时间了),因为它使用了自定义控件作为编辑框的父控件(渲染框架的东西)。 You will probably want to add handlers to EditboxProc to handle pass message to and from the edit control (like WM_NOTIFY, WM_COMMAND, WM_GETTEXT, etc) and to render the rounded corners (WM_PAINT, WM_ERASEBKGND).
您可能想要向EditboxProc添加处理程序,以处理与编辑控件之间的传递消息(例如WM_NOTIFY,WM_COMMAND,WM_GETTEXT等),并渲染圆角(WM_PAINT,WM_ERASEBKGND)。
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