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added Set/GetLineHeight().

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This commit is contained in:
michaelp%netscape.com 1999-03-20 01:25:37 +00:00
parent f9909200eb
commit 7269559974
3 changed files with 64 additions and 2 deletions
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15
view/public/nsIScrollableView.h
View File

@ -169,6 +169,21 @@ public:
*/
NS_IMETHOD GetScrollProperties(PRUint32 *aProperties) = 0;
/**
* Set the height of a line used for line scrolling.
* @param aHeight new line height in app units. the default
* height is 12 points.
* @return error status
*/
NS_IMETHOD SetLineHeight(nscoord aHeight) = 0;
/**
* Get the height of a line used for line scrolling.
* @param aHeight out parameter for line height
* @return error status
*/
NS_IMETHOD GetLineHeight(nscoord *aHeight) = 0;
/**
* Scroll the view up or down by aNumLines lines. positive
* values move down in the view. Prevents scrolling off the

43
view/src/nsScrollingView.cpp
View File

@ -390,6 +390,7 @@ nsScrollingView :: nsScrollingView()
mCornerView = nsnull;
mScrollPref = nsScrollPreference_kAuto;
mScrollingTimer = nsnull;
mLineHeight = 240;
}
nsScrollingView :: ~nsScrollingView()
@ -442,6 +443,32 @@ nsrefcnt nsScrollingView :: Release()
return 1;
}
NS_IMETHODIMP nsScrollingView :: Init(nsIViewManager* aManager,
const nsRect &aBounds,
const nsIView *aParent,
const nsViewClip *aClip,
nsViewVisibility aVisibilityFlag)
{
nsIDeviceContext *dx = nsnull;
aManager->GetDeviceContext(dx);
if (dx)
{
float t2d, d2a;
dx->GetTwipsToDevUnits(t2d);
dx->GetDevUnitsToAppUnits(d2a);
mLineHeight = NSToCoordRound(240.0f * t2d * d2a);
NS_RELEASE(dx);
}
return nsView::Init(aManager, aBounds, aParent, aClip, aVisibilityFlag);
}
NS_IMETHODIMP nsScrollingView :: SetDimensions(nscoord width, nscoord height, PRBool aPaint)
{
nsIDeviceContext *dx;
@ -1047,7 +1074,7 @@ NS_IMETHODIMP nsScrollingView :: ComputeScrollOffsets(PRBool aAdjustWidgets)
dy = NSTwipsToIntPixels((offy - mOffsetY), scale);
scrollv->SetParameters(mSizeY, availheight,
mOffsetY, NSIntPointsToTwips(12));
mOffsetY, mLineHeight);
}
else
{
@ -1126,7 +1153,7 @@ NS_IMETHODIMP nsScrollingView :: ComputeScrollOffsets(PRBool aAdjustWidgets)
dx = NSTwipsToIntPixels((offx - mOffsetX), scale);
scrollh->SetParameters(mSizeX, availwidth,
mOffsetX, NSIntPointsToTwips(12));
mOffsetX, mLineHeight);
}
else
{
@ -1568,6 +1595,18 @@ NS_IMETHODIMP nsScrollingView :: GetScrollProperties(PRUint32 *aProperties)
return NS_OK;
}
NS_IMETHODIMP nsScrollingView :: SetLineHeight(nscoord aHeight)
{
mLineHeight = aHeight;
return NS_OK;
}
NS_IMETHODIMP nsScrollingView :: GetLineHeight(nscoord *aHeight)
{
*aHeight = mLineHeight;
return NS_OK;
}
NS_IMETHODIMP nsScrollingView :: ScrollByLines(PRInt32 aNumLines)
{
nsIScrollbar *scrollv = nsnull;

8
view/src/nsScrollingView.h
View File

@ -36,6 +36,11 @@ public:
void** aInstancePtr);
//overrides
NS_IMETHOD Init(nsIViewManager* aManager,
const nsRect &aBounds,
const nsIView *aParent,
const nsViewClip *aClip = nsnull,
nsViewVisibility aVisibilityFlag = nsViewVisibility_kShow);
NS_IMETHOD SetDimensions(nscoord width, nscoord height, PRBool aPaint = PR_TRUE);
NS_IMETHOD SetPosition(nscoord aX, nscoord aY);
NS_IMETHOD HandleEvent(nsGUIEvent *aEvent, PRUint32 aEventFlags, nsEventStatus &aStatus);
@ -64,6 +69,8 @@ public:
PRBool *aHorizontalVisible) const;
NS_IMETHOD SetScrollProperties(PRUint32 aProperties);
NS_IMETHOD GetScrollProperties(PRUint32 *aProperties);
NS_IMETHOD SetLineHeight(nscoord aHeight);
NS_IMETHOD GetLineHeight(nscoord *aHeight);
NS_IMETHOD ScrollByLines(PRInt32 aNumLines);
NS_IMETHOD ScrollByPages(PRInt32 aNumPages);
@ -98,6 +105,7 @@ protected:
nsITimer *mScrollingTimer;
nscoord mScrollingDelta;
PRUint32 mScrollProperties;
nscoord mLineHeight;
};
#endif