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Added code for hit detection. (Can now detect a hit on the trigger and tell

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which row/column was hit.)
This commit is contained in:
hyatt%netscape.com 1998-12-16 23:02:30 +00:00
parent f4e91e426d
commit 9dba4a3edb
4 changed files with 170 additions and 51 deletions
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8
widget/src/xpwidgets/nsHTTreeItem.h
View File

@ -64,6 +64,11 @@ public:
virtual void GetTextForColumn(nsTreeColumn* pColumn, nsString& nodeText) const;
virtual void GetTreeItemRectangle(nsRect& rect) const { rect = mRowRectangle; };
virtual void SetTreeItemRectangle(const nsRect& rect) { mRowRectangle = rect; };
virtual void GetTriggerRectangle(nsRect& rect) const { rect = mTriggerRectangle; };
virtual void SetTriggerRectangle(const nsRect& rect) { mTriggerRectangle = rect; };
protected:
nsIImageRequest* RequestImage(nsString& reqUrl) const; // Helper to kick off the image load.
nsIImage* GetTriggerImage() const;
@ -76,6 +81,9 @@ protected:
nsIImageRequest* mClosedTriggerRequest; // Closed trigger image
nsIImageRequest* mOpenTriggerRequest; // Open trigger image
nsIImageRequest* mBackgroundRequest; // The background image
nsRect mRowRectangle; // A cached copy of our position within the tree view.
nsRect mTriggerRectangle; // A cached copy of our trigger rectangle
};
#endif /* nsHTTreeItem_h___ */

4
widget/src/xpwidgets/nsTreeItem.h
View File

@ -48,6 +48,10 @@ public:
virtual void GetTextForColumn(nsTreeColumn* pColumn, nsString& nodeText) const = 0;
virtual void GetTreeItemRectangle(nsRect& rect) const = 0;
virtual void SetTreeItemRectangle(const nsRect& rect) = 0;
virtual void GetTriggerRectangle(nsRect& rect) const = 0;
virtual void SetTriggerRectangle(const nsRect& rect) = 0;
};
#endif /* nsTreeItem_h___ */

203
widget/src/xpwidgets/nsTreeView.cpp
View File

@ -178,54 +178,7 @@ nsEventStatus nsTreeView::HandleEvent(nsGUIEvent *aEvent)
}
else if (aEvent->message == NS_MOUSE_LEFT_BUTTON_UP)
{
if (mMouseDown)
{
mCachedMovePoint.x = aEvent->point.x;
mCachedMovePoint.y = aEvent->point.y;
mMouseDown = PR_FALSE;
mMouseDragging = PR_FALSE;
if (mDraggingColumnEdge)
{
// Finish up.
DragColumnEdge(mCachedMovePoint.x);
RecomputeColumnPercentages();
mDraggingColumnEdge = PR_FALSE;
}
if (mColumnBarRect.Contains(mCachedMovePoint.x, mCachedMovePoint.y))
{
int currentPosition = 0;
int remainingSpace = mColumnBarRect.width;
int totalSpace = mColumnBarRect.width;
PRUint32 count = mDataModel->GetVisibleColumnCount();
// The user boinked a column or a pusher. Figure out which.
for (PRUint32 n = 0; n < count; n++)
{
// Fetch each column.
nsTreeColumn* pColumn = mDataModel->GetNthColumn(n);
int pixelWidth = pColumn->GetPixelWidth();
remainingSpace -= pixelWidth;
currentPosition += pixelWidth;
// TODO: See if we hit this column header
if (mCachedMovePoint.x < currentPosition)
{
// We hit this column header.
return nsEventStatus_eIgnore;
}
}
// Must have hit a pusher
if (mCachedMovePoint.x < (currentPosition + (remainingSpace / 2)))
ShowColumn(); // Hit the left pusher
else HideColumn(); // Hit the right pusher
}
}
HandleMouseUp(aEvent);
}
return nsEventStatus_eIgnore;
}
@ -295,6 +248,141 @@ void nsTreeView::HandleMouseMove(nsGUIEvent* aEvent)
}
}
void nsTreeView::HandleMouseUp(nsGUIEvent* aEvent)
{
if (mMouseDown)
{
mCachedMovePoint.x = aEvent->point.x;
mCachedMovePoint.y = aEvent->point.y;
mMouseDown = PR_FALSE;
mMouseDragging = PR_FALSE;
if (mDraggingColumnEdge)
{
// Finish up.
DragColumnEdge(mCachedMovePoint.x);
RecomputeColumnPercentages();
mDraggingColumnEdge = PR_FALSE;
}
if (mColumnBarRect.Contains(mCachedMovePoint.x, mCachedMovePoint.y) &&
mColumnBarRect.Contains(mCachedDownPoint.x, mCachedDownPoint.y))
{
int currentPosition = 0;
int remainingSpace = mColumnBarRect.width;
int totalSpace = mColumnBarRect.width;
PRUint32 count = mDataModel->GetVisibleColumnCount();
// The user boinked a column or a pusher. Figure out which.
for (PRUint32 n = 0; n < count; n++)
{
// Fetch each column.
nsTreeColumn* pColumn = mDataModel->GetNthColumn(n);
int pixelWidth = pColumn->GetPixelWidth();
remainingSpace -= pixelWidth;
currentPosition += pixelWidth;
// TODO: See if we hit this column header
if (mCachedMovePoint.x < currentPosition)
{
// We hit this column header.
return;
}
}
// Must have hit a pusher
if (mCachedMovePoint.x < (currentPosition + (remainingSpace / 2)))
ShowColumn(); // Hit the left pusher
else HideColumn(); // Hit the right pusher
}
else if (mTreeRect.Contains(mCachedMovePoint.x, mCachedMovePoint.y) &&
mTreeRect.Contains(mCachedDownPoint.x, mCachedDownPoint.y))
{
// The user clicked on a location in the tree.
// Determine the click location. Can be one of three things:
// The background of the tree view, the trigger for a node,
// or the text in a specific column.
PRUint32 row, column;
DetermineHitLocation(mCachedMovePoint, row, column, type);
// If the user boinked the trigger, then we need to open or close the node.
if (type == eTriggerHit)
{
}
else if (type == eContentHit)
{
// The user boinked content (a text or icon). Select it.
}
else
{
// The user clicked on the background. Deselect all items.
}
}
}
}
void nsTreeView::DetermineHitLocation(const nsPoint& point,
PRUint32& row, PRUint32& column, nsHitLocation& location)
{
int yPosition = mTreeRect.y;
PRUint32 n = mDataModel->GetFirstVisibleItemIndex();
nsTreeItem* pItem = (nsTreeItem*)mDataModel->GetNthItem(n);
while (pItem && yPosition < mTreeRect.y + mTreeRect.height)
{
// Retrieve our cached rectangle data for the item.
nsRect rowRect, triggerRect;
pItem->GetTreeItemRectangle(rowRect);
pItem->GetTriggerRectangle(triggerRect);
if (rowRect.Contains(point.x, point.y))
{
row = n;
// Determine which column we hit.
PRUint32 count = mDataModel->GetVisibleColumnCount();
int currentPosition = 0;
for (PRUint32 m = 0; m < count; m++)
{
// Fetch each column.
nsTreeColumn* pColumn = mDataModel->GetNthColumn(m);
if (pColumn)
{
// Retrieve the column's current pixel width.
int pixelWidth = pColumn->GetPixelWidth();
if (point.x >= currentPosition && point.x < currentPosition+pixelWidth)
{
// The user hit this column.
column = m;
// Now we need to determine what the user clicked on.
if (triggerRect.Contains(point.x, point.y))
{
location = eTriggerHit;
}
else
{
// See if we hit the text rectangle.
location = eBackgroundHit;
}
return;
}
// Augment our current position
currentPosition += pixelWidth;
}
}
}
n++;
pItem = (nsTreeItem*)mDataModel->GetNthItem(n);
}
}
void nsTreeView::PaintTitleBar(nsIRenderingContext* drawCtx,
nsRect& rect)
{
@ -708,9 +796,9 @@ void nsTreeView::PaintTreeRow(nsIRenderingContext* drawCtx, nsTreeItem* pItem, i
PRBool leftJustifyTrigger = styleInfo.leftJustifyTrigger;
PRBool showIcon = styleInfo.showIcon;
if (pTriggerImage)
if (pTriggerImage && showTrigger)
triggerHeight = pTriggerImage->GetHeight();
if (pIconImage)
if (pIconImage && showIcon)
iconHeight = pIconImage->GetHeight();
lineHeight = fontWithPadding + 1;
@ -725,6 +813,9 @@ void nsTreeView::PaintTreeRow(nsIRenderingContext* drawCtx, nsTreeItem* pItem, i
nsRect lineRect(0, yPosition, mColumnBarRect.width, lineHeight);
yPosition += lineHeight;
// Cache our line rect with the tree item to make hit testing easier.
pItem->SetTreeItemRectangle(lineRect);
// Fill the rect with our BGColor. TODO: Fetch properties etc.
drawCtx->SetColor(styleInfo.backgroundColor);
drawCtx->FillRect(lineRect);
@ -775,10 +866,20 @@ void nsTreeView::PaintTreeRow(nsIRenderingContext* drawCtx, nsTreeItem* pItem, i
iconStart = triggerStart + triggerWidth + cIconMargin;
}
// Cache our trigger rect to make hit testing easier.
nsRect triggerRect(0,0,0,0);
if (pTriggerImage && showTrigger)
{
triggerRect = nsRect(triggerStart-1, lineRect.y - 1 + (lineHeight-1-triggerHeight)/2,
triggerWidth+2, triggerHeight+2);
}
pItem->SetTriggerRectangle(triggerRect);
// Paint the trigger and icon
if (pTriggerImage && showTrigger)
drawCtx->DrawImage(pTriggerImage, triggerStart,
lineRect.y + (lineHeight-1-triggerHeight)/2);
if (pIconImage)
if (pIconImage && showIcon)
drawCtx->DrawImage(pIconImage, iconStart,
lineRect.y + (lineHeight-1-iconHeight)/2);

6
widget/src/xpwidgets/nsTreeView.h
View File

@ -115,6 +115,12 @@ protected:
// Event handlers for specific mouse actions
void HandleMouseMove(nsGUIEvent* aEvent);
void HandleMouseUp(nsGUIEvent* aEvent);
// Helper for determining hit locations.
enum nsHitLocation { eTriggerHit, eContentHit, eBackgroundHit };
void DetermineHitLocation(const nsPoint& point,
PRUint32& row, PRUint32& column, nsHitLocation& location);
protected:
// Data members (*** these should both be smart pointers***)