Started drawing the SV chooser part of the Windows color dialog.
This commit is contained in:
Pietro Gagliardi
parent
2c160bb5eb
commit
3128e58c5b
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@ -22,8 +22,6 @@ static void uiColorButtonDestroy(uiControl *c)
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uiFreeControl(uiControl(b));
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}
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static INT_PTR TODO(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam){return uMsg == WM_INITDIALOG;}
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static BOOL onWM_COMMAND(uiControl *c, HWND hwnd, WORD code, LRESULT *lResult)
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{
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uiColorButton *b = uiColorButton(c);
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@ -46,8 +44,6 @@ static BOOL onWM_COMMAND(uiControl *c, HWND hwnd, WORD code, LRESULT *lResult)
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(*(b->onChanged))(b, b->onChangedData);
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}
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DialogBox(hInstance, MAKEINTRESOURCE(rcColorDialog), GetAncestor(b->hwnd, GA_ROOT), TODO);
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*lResult = 0;
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return TRUE;
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}
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@ -23,28 +23,194 @@ struct colorDialog {
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struct colorDialogRGBA *out;
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};
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static void endColorDialog(struct colorDialog *c, INT_PTR code)
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// both of these are from the wiki
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static void rgb2HSV(double r, double g, double b, double *h, double *s, double *v)
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{
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if (EndDialog(c->hwnd, code) == 0)
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logLastError(L"error ending color dialog");
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uiFree(c);
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}
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double M, m;
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int whichmax;
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double c;
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static BOOL tryFinishDialog(struct colorDialog *c, WPARAM wParam)
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{
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// cancelling
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if (LOWORD(wParam) != IDOK) {
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endColorDialog(c, 1);
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return TRUE;
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M = r;
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whichmax = 0;
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if (M < g) {
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M = g;
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whichmax = 1;
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}
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if (M < b) {
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M = b;
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whichmax = 2;
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}
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m = r;
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if (m > g)
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m = g;
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if (m > b)
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m = b;
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c = M - m;
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if (c == 0)
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*h = 0;
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else {
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switch (whichmax) {
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case 0:
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*h = ((g - b) / c);
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if (*h > 6)
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*h -= 6;
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break;
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case 1:
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*h = ((b - r) / c) + 2;
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break;
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case 2:
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*h = ((r - g) / c) + 4;
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break;
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}
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*h /= 6; // put in range [0,1)
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}
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// OK
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c->out->r = c->r;
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c->out->g = c->g;
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c->out->b = c->b;
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c->out->a = c->a;
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endColorDialog(c, 2);
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return TRUE;
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*v = M;
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if (c == 0)
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*s = 0;
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else
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*s = c / *v;
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}
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static void hsv2RGB(double h, double s, double v, double *r, double *g, double *b)
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{
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double c;
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int hPrime;
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double x;
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double m;
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double c1, c2;
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c = v * s;
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hPrime = (int) (h * 6); // equivalent to splitting into 60° chunks
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x = c * (1 - abs(hPrime % 2 - 1));
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m = v - c;
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switch (hPrime) {
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case 0:
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*r = c + m;
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*g = x + m;
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*b = m;
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return;
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case 1:
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*r = x + m;
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*g = c + m;
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*b = m;
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return;
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case 2:
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*r = m;
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*g = c + m;
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*b = x + m;
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return;
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case 3:
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*r = m;
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*g = x + m;
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*b = c + m;
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return;
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case 4:
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*r = x + m;
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*g = m;
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*b = c + m;
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return;
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case 5:
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*r = c + m;
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*g = m;
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*b = x + m;
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return;
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}
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// TODO
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}
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// this interesting approach comes from xxxx
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static void drawSVChooser(struct colorDialog *c, ID2D1RenderTarget *rt)
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{
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D2D1_SIZE_F size;
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D2D1_RECT_F rect;
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double h, s, v;
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double rTop, gTop, bTop;
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D2D1_GRADIENT_STOP stops[2];
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ID2D1GradientStopCollection *collection;
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D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES lprop;
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D2D1_BRUSH_PROPERTIES bprop;
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ID2D1LinearGradientBrush *brush;
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HRESULT hr;
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size = rt->GetSize();
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rect.left = 0;
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rect.top = 0;
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rect.right = size.width;
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rect.bottom = size.height;
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// TODO draw checkerboard
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// first, draw a vertical gradient from the current hue at max S/V to black
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// the source example draws it upside down; let's do so too just to be safe
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rgb2HSV(c->r, c->g, c->b, &h, &s, &v);
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hsv2RGB(h, 1.0, 1.0, &rTop, &gTop, &bTop);
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stops[0].position = 0;
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stops[0].color.r = 0.0;
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stops[0].color.g = 0.0;
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stops[0].color.b = 0.0;
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stops[0].color.a = 1.0;
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stops[1].position = 1;
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stops[1].color.r = rTop;
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stops[1].color.g = gTop;
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stops[1].color.b = bTop;
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stops[1].color.a = 1.0;
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hr = rt->CreateGradientStopCollection(stops, 2,
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D2D1_GAMMA_2_2, D2D1_EXTEND_MODE_CLAMP,
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&collection);
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if (hr != S_OK)
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logHRESULT(L"error making gradient stop collection for first gradient in SV chooser", hr);
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ZeroMemory(&lprop, sizeof (D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES));
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lprop.startPoint.x = size.width / 2;
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lprop.startPoint.y = size.height;
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lprop.endPoint.x = size.width / 2;
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lprop.endPoint.y = 0;
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ZeroMemory(&bprop, sizeof (D2D1_BRUSH_PROPERTIES));
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bprop.opacity = 1.0;
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bprop.transform._11 = 1;
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bprop.transform._22 = 1;
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hr = rt->CreateLinearGradientBrush(&lprop, &bprop,
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collection, &brush);
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if (hr != S_OK)
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logHRESULT(L"error making gradient brush for first gradient in SV chooser", hr);
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rt->FillRectangle(&rect, brush);
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brush->Release();
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collection->Release();
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}
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static LRESULT CALLBACK svChooserSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)
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{
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ID2D1RenderTarget *rt;
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struct colorDialog *c;
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switch (uMsg) {
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case msgD2DScratchPaint:
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rt = (ID2D1RenderTarget *) lParam;
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c = (struct colorDialog *) dwRefData;
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drawSVChooser(c, rt);
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return 0;
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case WM_NCDESTROY:
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if (RemoveWindowSubclass(hwnd, svChooserSubProc, uIdSubclass) == FALSE)
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logLastError(L"error removing color dialog SV chooser subclass");
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break;
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}
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return DefSubclassProc(hwnd, uMsg, wParam, lParam);
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}
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// TODO extract into d2dscratch.cpp, use in font dialog
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HWND replaceWithD2DScratch(HWND parent, int id, SUBCLASSPROC subproc, void *data)
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{
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HWND replace;
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RECT r;
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replace = getDlgItem(parent, id);
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uiWindowsEnsureGetWindowRect(replace, &r);
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mapWindowRect(NULL, parent, &r);
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uiWindowsEnsureDestroyWindow(replace);
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return newD2DScratch(parent, &r, (HMENU) id, subproc, (DWORD_PTR) data);
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// TODO preserve Z-order
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}
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// a few issues:
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@ -145,6 +311,7 @@ static struct colorDialog *beginColorDialog(HWND hwnd, LPARAM lParam)
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// TODO set up d2dscratches
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// TODO prefix all these with rcColor instead of just rc
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c->editH = getDlgItem(c->hwnd, rcH);
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c->editS = getDlgItem(c->hwnd, rcS);
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c->editV = getDlgItem(c->hwnd, rcV);
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@ -158,11 +325,37 @@ static struct colorDialog *beginColorDialog(HWND hwnd, LPARAM lParam)
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c->editAInt = getDlgItem(c->hwnd, rcAInt);
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c->editHex = getDlgItem(c->hwnd, rcHex);
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c->svChooser = replaceWithD2DScratch(c->hwnd, rcColorSVChooser, svChooserSubProc, c);
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fixupControlPositions(c);
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return c;
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}
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static void endColorDialog(struct colorDialog *c, INT_PTR code)
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{
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if (EndDialog(c->hwnd, code) == 0)
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logLastError(L"error ending color dialog");
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uiFree(c);
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}
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static BOOL tryFinishDialog(struct colorDialog *c, WPARAM wParam)
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{
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// cancelling
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if (LOWORD(wParam) != IDOK) {
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endColorDialog(c, 1);
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return TRUE;
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}
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// OK
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c->out->r = c->r;
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c->out->g = c->g;
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c->out->b = c->b;
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c->out->a = c->a;
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endColorDialog(c, 2);
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return TRUE;
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}
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static INT_PTR CALLBACK colorDialogDlgProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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struct colorDialog *c;
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