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NxWidget::CImage: Now supports helper methods to align images in the widget region

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This commit is contained in:
Gregory Nutt 2014-07-14 20:37:39 -06:00
parent 636e61b639
commit 322a3df832
2 changed files with 159 additions and 2 deletions
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66
libnxwidgets/include/cimage.hxx
View File

@ -232,6 +232,39 @@ namespace NXWidgets
void setImageLeft(nxgl_coord_t column);
/**
* Align the image at the left of the widget region.
*
* NOTE: The CImage widget does not support any persistent alignment
* attribute (at least not at the moment). As a result, this alignment
* can be lost if the image is changed or if the widget is resized.
*/
inline void alignHorizontalLeft(void)
{
setImageLeft(0);
}
/**
* Align the image at the left of the widget region.
*
* NOTE: The CImage widget does not support any persistent alignment
* attribute (at least not at the moment). As a result, this alignment
* can be lost if the image is changed or if the widget is resized.
*/
void alignHorizontalCenter(void);
/**
* Align the image at the left of the widget region.
*
* NOTE: The CImage widget does not support any persistent alignment
* attribute (at least not at the moment). As a result, this alignment
* can be lost if the image is changed or if the widget is resized.
*/
void alignHorizontalRight(void);
/**
* Set the vertical position of the bitmap. Zero is the top edge
* of the bitmap and values >0 will move the bit map down.
@ -241,6 +274,39 @@ namespace NXWidgets
void setImageTop(nxgl_coord_t row);
/**
* Align the image at the top of the widget region.
*
* NOTE: The CImage widget does not support any persistent alignment
* attribute (at least not at the moment). As a result, this alignment
* can be lost if the image is changed or if the widget is resized.
*/
inline void alignVerticalTop(void)
{
setImageTop(0);
}
/**
* Align the image at the middle of the widget region.
*
* NOTE: The CImage widget does not support any persistent alignment
* attribute (at least not at the moment). As a result, this alignment
* can be lost if the image is changed or if the widget is resized.
*/
void alignVerticalCenter(void);
/**
* Align the image at the left of the widget region.
*
* NOTE: The CImage widget does not support any persistent alignment
* attribute (at least not at the moment). As a result, this alignment
* can be lost if the image is changed or if the widget is resized.
*/
void alignVerticalBottom(void);
/**
* Control the highlight state.
*

95
libnxwidgets/src/cimage.cxx
View File

@ -455,12 +455,57 @@ void CImage::onReleaseOutside(nxgl_coord_t x, nxgl_coord_t y)
void CImage::setImageLeft(nxgl_coord_t column)
{
if (m_bitmap && column >= 0 && column < getWidth())
// Get the the drawable region
CRect rect;
getRect(rect);
if (m_bitmap && column >= 0 && column < rect.getWidth())
{
m_origin.x = column;
}
}
/**
* Align the image at the left of the widget region.
*
* NOTE: The CImage widget does not support any persistent alignment
* attribute (at least not at the moment). As a result, this alignment
* can be lost if the image is changed or if the widget is resized.
*/
void CImage::alignHorizontalCenter(void)
{
// Get the the drawable region
CRect rect;
getRect(rect);
// Center the image
setImageLeft((rect.getWidth() - m_bitmap->getWidth()) >> 1);
}
/**
* Align the image at the left of the widget region.
*
* NOTE: The CImage widget does not support any persistent alignment
* attribute (at least not at the moment). As a result, this alignment
* can be lost if the image is changed or if the widget is resized.
*/
void CImage::alignHorizontalRight(void)
{
// Get the the drawable region
CRect rect;
getRect(rect);
// Position the image at the right of the widget region
setImageLeft(rect.getWidth() - m_bitmap->getWidth());
}
/**
* Set the vertical position of the bitmap. Zero is the top edge
* of the bitmap and values >0 will move the bit map down.
@ -472,9 +517,55 @@ void CImage::setImageLeft(nxgl_coord_t column)
void CImage::setImageTop(nxgl_coord_t row)
{
if (m_bitmap && row >= 0 && row < getHeight())
// Get the the drawable region
CRect rect;
getRect(rect);
// Check the attempted Y position
if (m_bitmap && row >= 0 && row < rect.getHeight())
{
m_origin.y = row;
}
}
/**
* Align the image at the middle of the widget region.
*
* NOTE: The CImage widget does not support any persistent alignment
* attribute (at least not at the moment). As a result, this alignment
* can be lost if the image is changed or if the widget is resized.
*/
void CImage::alignVerticalCenter(void)
{
// Get the the drawable region
CRect rect;
getRect(rect);
// Center the image
setImageTop((rect.getHeight() - m_bitmap->getHeight()) >> 1);
}
/**
* Align the image at the left of the widget region.
*
* NOTE: The CImage widget does not support any persistent alignment
* attribute (at least not at the moment). As a result, this alignment
* can be lost if the image is changed or if the widget is resized.
*/
void CImage::alignVerticalBottom(void)
{
// Get the the drawable region
CRect rect;
getRect(rect);
// Position the image at the bottom of the widget region
setImageTop(rect.getHeight() - m_bitmap->getHeight());
}