CMFCColorPickerCtrl Class

Articolo
07/24/2011

The CMFCColorPickerCtrl class provides functionality for a control that is used to select colors.

class CMFCColorPickerCtrl : public CButton

Members

Public Constructors

Name	Description
CMFCColorPickerCtrl::CMFCColorPickerCtrl	Constructs a CMFCColorPickerCtrl object.

Public Methods

Name	Description
CMFCColorPickerCtrl::GetColor	Retrieves the color that the user selects.
CMFCColorPickerCtrl::GetHLS	Retrieves the hue, luminance and saturation values of the color that the user selects.
CMFCColorPickerCtrl::GetHue	Retrieves the hue component of the color that the user selects.
CMFCColorPickerCtrl::GetLuminance	Retrieves the luminance component of the color that the user selects.
CMFCColorPickerCtrl::GetSaturation	Retrieves the saturation component of the color that the user selects.
CMFCColorPickerCtrl::SelectCellHexagon	Sets the current color to the color defined by the specified RGB color components or the specified cell hexagon.
CMFCColorPickerCtrl::SetColor	Sets the current color to the specified RGB color value.
CMFCColorPickerCtrl::SetHLS	Sets the current color to the specified HLS color value.
CMFCColorPickerCtrl::SetHue	Changes the hue component of the currently selected color.
CMFCColorPickerCtrl::SetLuminance	Changes the luminance component of the currently selected color.
CMFCColorPickerCtrl::SetLuminanceBarWidth	Sets the width of the luminance bar in the color picker control.
CMFCColorPickerCtrl::SetOriginalColor	Sets the initial selected color.
CMFCColorPickerCtrl::SetPalette	Sets the current color palette.
CMFCColorPickerCtrl::SetSaturation	Changes the saturation component of the currently selected color.
CMFCColorPickerCtrl::SetType	Sets the type of color picker control to display.

Protected Methods

Name	Description
CMFCColorPickerCtrl::DrawCursor	Called by the framework before a cursor that points to the selected color is displayed.

Remarks

Standard colors are selected from a hexagonal color palette, and custom colors are selected from a luminance bar where colors are specified using either red/green/blue notation or hue/satuaration/luminance notation.

The following illustration depicts several CMFCColorPickerCtrl objects.

CMFCColorPickerCtrl dialog box

The CMFCColorPickerCtrl supports two pairs of styles. The HEX and HEX_GREYSCALE styles are appropriate for standard color selection. The PICKER and LUMINANCE styles are appropriate for custom color selection.

Perform the following steps to incorporate the CMFCColorPickerCtrl control into your dialog box:

If you use the ClassWizard, insert a new button control into your dialog box template (because the CMFCColorPickerCtrl class is inherited from the CButton class).
Insert a member variable that is associated with the new button control into your dialog box class. Then change the variable type from CButton to CMFCColorPickerCtrl.
Insert the WM_INITDIALOG message handler for the dialog box class. In the handler, set the type, palette, and initial selected color of the CMFCColorPickerCtrl control.

Example

The following example demonstrates how to configure a CMFCColorPickerCtrl object by using various methods in the CMFCColorPickerCtrl class. The example demonstrates how to set the type of the picker control, and how to set its color, hue, luminance, and saturation. The example is part of the New Controls sample.

    CMFCColorPickerCtrl m_wndLum;


...


    // CPalette m_palSys
    // set the type of the color picker control
    m_wndLum.SetType(CMFCColorPickerCtrl::LUMINANCE);
    m_wndLum.SetPalette(&m_palSys);
    // set the color, hue, luminance and saturation of the color picker control
    m_wndLum.SetColor(RGB(0, 255, 0));
    m_wndLum.SetHue(0.5);
    m_wndLum.SetLuminance(2.5);
    m_wndLum.SetLuminanceBarWidth(10);
    m_wndLum.SetSaturation(0.5);