使用soui4实现一个拾色器

拾色器类

#pragma once
class CClrPickerCtrl : public SWindow
{DEF_SOBJECT(SWindow, L"clrpicker")
public:CClrPickerCtrl(void);~CClrPickerCtrl(void);//跟solider控件设置色调void SetSliderPos(int nPos);//获取选取位置的颜色COLORREF GetColor();
protected:LRESULT OnCreate(LPVOID);void OnPaint(IRenderTarget* pRT);void OnLButtonDown(UINT nFlags, SOUI::CPoint pt);void OnLButtonUp(UINT nFlags, SOUI::CPoint pt);void OnMouseMove(UINT nFlags, SOUI::CPoint point);SOUI_MSG_MAP_BEGIN()MSG_WM_CREATE(OnCreate)MSG_WM_PAINT_EX(OnPaint)MSG_WM_LBUTTONDOWN(OnLButtonDown)MSG_WM_LBUTTONUP(OnLButtonUp)MSG_WM_MOUSEMOVE(OnMouseMove)SOUI_MSG_MAP_END()SOUI_ATTRS_BEGIN()SOUI_ATTRS_END()protected://将HSV色彩模型转为RGB颜色值COLORREF HSV2RGB(const double hsv[3]);private:SOUI::CPoint m_point;int	m_nSoliderPos;COLORREF m_clrSelect;
};

#include "stdafx.h"
#include "CClrPickerCtrl.h"CClrPickerCtrl::CClrPickerCtrl()
{m_nSoliderPos = 0;
}CClrPickerCtrl::~CClrPickerCtrl()
{
}LRESULT CClrPickerCtrl::OnCreate(LPVOID)
{SetMsgHandled(FALSE);return __super::OnCreate(NULL);
}
COLORREF CClrPickerCtrl::HSV2RGB(const double hsv[3])
{//RGB的0.0-1.0表示double r = 0.0;double g = 0.0;double b = 0.0;int h_i = (int)abs(hsv[0] / 60.0);double f = hsv[0] / 60.0 - h_i;double p = hsv[2] * (1 - hsv[1]);double q = hsv[2] * (1 - f * hsv[1]);double t = hsv[2] * (1 - (1 - f) * hsv[1]);switch (h_i) {case 0:r = hsv[2]; g = t; b = p;break;case 1:r = q; g = hsv[2]; b = p;break;case 2:r = p; g = hsv[2]; b = t;break;case 3:r = p; g = q; b = hsv[2];break;case 4:r = t; g = p; b = hsv[2];break;case 5:r = hsv[2]; g = p; b = q;break;}//转换成0-255int R = (int)(r * 255 + 0.5);int G = (int)(g * 255 + 0.5);int B = (int)(b * 255 + 0.5);return RGBA(R, G, B, 255);
}
void CClrPickerCtrl::OnPaint(IRenderTarget* pRT)
{SetMsgHandled(FALSE);pRT->SetAntiAlias(TRUE);CRect rcClient = GetWindowRect();int nStep = rcClient.Width() / 100;for (int i = 0; i < 100; i++){double hsv[3] = { m_nSoliderPos, (double)i / 100, 1};COLORREF crUp = HSV2RGB(hsv);COLORREF crDown = RGBA(0, 0, 0, 255);CRect rcDraw = { rcClient.left + nStep * i,	rcClient.top, rcClient.left + nStep * (i + 1), rcClient.bottom };GradientItem gradients[2] = { crUp, 0.0f, crDown, 1.0f };pRT->DrawGradientRect(rcDraw, TRUE, CPoint(), gradients, 2, 0xff);}m_clrSelect = pRT->GetPixel(m_point.x, m_point.y);//绘制鼠标选中区域CAutoRefPtr<IPen> pen, oldpen;COLORREF clrBorder = GETCOLOR(L"RGBA(255,255,255,255)");pRT->CreatePen(PS_SOLID | PS_ENDCAP_SQUARE, clrBorder, 2, &pen);pRT->SelectObject(pen, (IRenderObj**)&oldpen);CRect rcClrArea;rcClrArea.top = m_point.y;rcClrArea.left = m_point.x;rcClrArea.right = m_point.x + 6;rcClrArea.bottom = m_point.y + 6;pRT->DrawRectangle(rcClrArea);pRT->SelectObject(oldpen, NULL);
}
void CClrPickerCtrl::OnLButtonDown(UINT nFlags, SOUI::CPoint pt)
{SetMsgHandled(FALSE);m_point = pt;Invalidate();
}
void CClrPickerCtrl::OnLButtonUp(UINT nFlags, SOUI::CPoint pt)
{SetMsgHandled(FALSE);//将颜色通过事件传递至上层Invalidate();
}
void CClrPickerCtrl::OnMouseMove(UINT nFlags, SOUI::CPoint point)
{SetMsgHandled(FALSE);CRect rcClient = GetClientRect();if ((nFlags & MK_LBUTTON)){m_point = point;if (point.x < rcClient.left) m_point.x = rcClient.left;else if (point.x > rcClient.right) m_point.x = rcClient.right;if (point.y < rcClient.top) m_point.y = rcClient.top;else if (point.y > rcClient.bottom) m_point.y = rcClient.bottom;}Invalidate();
}
void CClrPickerCtrl::SetSliderPos(int nPos)
{m_nSoliderPos = 359 - nPos;Invalidate();
}
COLORREF CClrPickerCtrl::GetColor()
{return m_clrSelect;
}

控件使用：
1、注册控件

m_theApp->RegisterWindowClass<CClrPickerCtrl>();

2、在布局中使用

<clrpicker name="clrpick" pos="100,[10,@450,@250" colorBkgnd="#FFFFFF" />
<sliderbar name ="sliderbar" vertical="1" thumbInRail="1" pos="[-30,{0,@16,@250" thumbSkin="skin_color_pick_thum" posSkin="skin_null" bkgndSkin="skin_color_pick_bk" min="0" max="359"/>

3、效果


在solider控件更改滑块位置时需要通知拾色器控件

//函数定义
void OnSilderChange(EventArgs* pEvt);//事件关联
EVENT_NAME_HANDLER(L"sliderbar", EventSliderPos::EventID, OnSilderChange)//函数实现
void CMainDlg::OnSilderChange(EventArgs* pEvt)
{EventSliderPos* evt = (EventSliderPos*)pEvt;if (evt){SSliderBar* pSliderbar = FindChildByName2<SSliderBar>(L"sliderbar");CClrPickerCtrl* pClrPick = FindChildByName2<CClrPickerCtrl>(L"clrpick");SASSERT(pClrPick);pClrPick->SetSliderPos(evt->nPos);pClrPick->Invalidate();}
}