libui/zOLD_windows/colorbutton.cpp

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// 16 may 2016
#include "uipriv_windows.hpp"
struct uiColorButton {
uiWindowsControl c;
HWND hwnd;
double r;
double g;
double b;
double a;
void (*onChanged)(uiColorButton *, void *);
void *onChangedData;
};
static void uiColorButtonDestroy(uiControl *c)
{
uiColorButton *b = uiColorButton(c);
uiWindowsUnregisterWM_COMMANDHandler(b->hwnd);
uiWindowsUnregisterWM_NOTIFYHandler(b->hwnd);
uiWindowsEnsureDestroyWindow(b->hwnd);
uiFreeControl(uiControl(b));
}
static BOOL onWM_COMMAND(uiControl *c, HWND hwnd, WORD code, LRESULT *lResult)
{
uiColorButton *b = uiColorButton(c);
HWND parent;
struct colorDialogRGBA rgba;
if (code != BN_CLICKED)
return FALSE;
parent = parentToplevel(b->hwnd);
rgba.r = b->r;
rgba.g = b->g;
rgba.b = b->b;
rgba.a = b->a;
if (showColorDialog(parent, &rgba)) {
b->r = rgba.r;
b->g = rgba.g;
b->b = rgba.b;
b->a = rgba.a;
invalidateRect(b->hwnd, NULL, TRUE);
(*(b->onChanged))(b, b->onChangedData);
}
*lResult = 0;
return TRUE;
}
static BOOL onWM_NOTIFY(uiControl *c, HWND hwnd, NMHDR *nmhdr, LRESULT *lResult)
{
uiColorButton *b = uiColorButton(c);
NMCUSTOMDRAW *nm = (NMCUSTOMDRAW *) nmhdr;
RECT client;
ID2D1DCRenderTarget *rt;
D2D1_RECT_F r;
D2D1_COLOR_F color;
D2D1_BRUSH_PROPERTIES bprop;
ID2D1SolidColorBrush *brush;
uiWindowsSizing sizing;
int x, y;
HRESULT hr;
if (nmhdr->code != NM_CUSTOMDRAW)
return FALSE;
// and allow the button to draw its background
if (nm->dwDrawStage != CDDS_PREPAINT)
return FALSE;
uiWindowsEnsureGetClientRect(b->hwnd, &client);
rt = makeHDCRenderTarget(nm->hdc, &client);
rt->BeginDraw();
uiWindowsGetSizing(b->hwnd, &sizing);
x = 3; // should be enough
y = 3;
uiWindowsSizingDlgUnitsToPixels(&sizing, &x, &y);
r.left = client.left + x;
r.top = client.top + y;
r.right = client.right - x;
r.bottom = client.bottom - y;
color.r = b->r;
color.g = b->g;
color.b = b->b;
color.a = b->a;
ZeroMemory(&bprop, sizeof (D2D1_BRUSH_PROPERTIES));
bprop.opacity = 1.0;
bprop.transform._11 = 1;
bprop.transform._22 = 1;
hr = rt->CreateSolidColorBrush(&color, &bprop, &brush);
if (hr != S_OK)
logHRESULT(L"error creating brush for color button", hr);
rt->FillRectangle(&r, brush);
brush->Release();
hr = rt->EndDraw(NULL, NULL);
if (hr != S_OK)
logHRESULT(L"error drawing color on color button", hr);
rt->Release();
// skip default processing (don't draw text)
*lResult = CDRF_SKIPDEFAULT;
return TRUE;
}
uiWindowsControlAllDefaultsExceptDestroy(uiColorButton)
// from http://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
#define buttonHeight 14
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// TODO check widths
static void uiColorButtonMinimumSize(uiWindowsControl *c, int *width, int *height)
{
uiColorButton *b = uiColorButton(c);
SIZE size;
uiWindowsSizing sizing;
int y;
// try the comctl32 version 6 way
size.cx = 0; // explicitly ask for ideal size
size.cy = 0;
if (SendMessageW(b->hwnd, BCM_GETIDEALSIZE, 0, (LPARAM) (&size)) != FALSE) {
*width = size.cx;
*height = size.cy;
return;
}
// that didn't work; fall back to using Microsoft's metrics
// Microsoft says to use a fixed width for all buttons; this isn't good enough
// use the text width instead, with some edge padding
*width = uiWindowsWindowTextWidth(b->hwnd) + (2 * GetSystemMetrics(SM_CXEDGE));
y = buttonHeight;
uiWindowsGetSizing(b->hwnd, &sizing);
uiWindowsSizingDlgUnitsToPixels(&sizing, NULL, &y);
*height = y;
}
static void defaultOnChanged(uiColorButton *b, void *data)
{
// do nothing
}
void uiColorButtonColor(uiColorButton *b, double *r, double *g, double *bl, double *a)
{
*r = b->r;
*g = b->g;
*bl = b->b;
*a = b->a;
}
void uiColorButtonSetColor(uiColorButton *b, double r, double g, double bl, double a)
{
b->r = r;
b->g = g;
b->b = bl;
b->a = a;
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invalidateRect(b->hwnd, NULL, TRUE);
}
void uiColorButtonOnChanged(uiColorButton *b, void (*f)(uiColorButton *, void *), void *data)
{
b->onChanged = f;
b->onChangedData = data;
}
uiColorButton *uiNewColorButton(void)
{
uiColorButton *b;
uiWindowsNewControl(uiColorButton, b);
// initial color is black
b->r = 0.0;
b->g = 0.0;
b->b = 0.0;
b->a = 1.0;
b->hwnd = uiWindowsEnsureCreateControlHWND(0,
L"button", L" ", // TODO; can't use "" TODO
BS_PUSHBUTTON | WS_TABSTOP,
hInstance, NULL,
TRUE);
uiWindowsRegisterWM_COMMANDHandler(b->hwnd, onWM_COMMAND, uiControl(b));
uiWindowsRegisterWM_NOTIFYHandler(b->hwnd, onWM_NOTIFY, uiControl(b));
uiColorButtonOnChanged(b, defaultOnChanged, NULL);
return b;
}