зеркало из https://github.com/mozilla/pjs.git
Added static method for getting the absolute rect in twips and pixels
moved from nsComboboxControlFrame.cpp r=dcone b=18895
This commit is contained in:
rods%netscape.com
Родитель
563ef43b98
Коммит
817c3a16ba
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@ -59,6 +59,7 @@
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#include "nsIDOMHTMLLegendElement.h"
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#include "nsIDOMHTMLButtonElement.h"
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#include "nsIEventStateManager.h"
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#include "nsIScrollableView.h"
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#ifdef DEBUG_evaughan
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//#define DEBUG_rods
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@ -968,3 +969,81 @@ nsFormControlFrame::GetScreenHeight(nsIPresContext* aPresContext, nscoord& aHeig
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return NS_ERROR_FAILURE;
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}
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// Calculate a frame's position in screen coordinates
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nsresult
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nsFormControlFrame::GetAbsoluteFramePosition(nsIPresContext* aPresContext,
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nsIFrame *aFrame,
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nsRect& aAbsoluteTwipsRect,
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nsRect& aAbsolutePixelRect)
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{
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//XXX: This code needs to take the view's offset into account when calculating
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//the absolute coordinate of the frame.
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nsresult rv = NS_OK;
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aFrame->GetRect(aAbsoluteTwipsRect);
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// zero these out,
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// because the GetOffsetFromView figures them out
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aAbsoluteTwipsRect.x = 0;
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aAbsoluteTwipsRect.y = 0;
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// Get conversions between twips and pixels
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float t2p;
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float p2t;
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aPresContext->GetTwipsToPixels(&t2p);
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aPresContext->GetPixelsToTwips(&p2t);
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// Add in frame's offset from it it's containing view
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nsIView *containingView = nsnull;
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nsPoint offset;
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rv = aFrame->GetOffsetFromView(aPresContext, offset, &containingView);
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if (NS_SUCCEEDED(rv) && (nsnull != containingView)) {
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aAbsoluteTwipsRect.x += offset.x;
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aAbsoluteTwipsRect.y += offset.y;
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nsPoint viewOffset;
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containingView->GetPosition(&viewOffset.x, &viewOffset.y);
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nsIView * parent;
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containingView->GetParent(parent);
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while (nsnull != parent) {
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nsPoint po;
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parent->GetPosition(&po.x, &po.y);
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viewOffset.x += po.x;
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viewOffset.y += po.y;
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nsIScrollableView * scrollView;
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if (NS_OK == containingView->QueryInterface(NS_GET_IID(nsIScrollableView), (void **)&scrollView)) {
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nscoord x;
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nscoord y;
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scrollView->GetScrollPosition(x, y);
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viewOffset.x -= x;
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viewOffset.y -= y;
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}
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nsIWidget * widget;
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parent->GetWidget(widget);
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if (nsnull != widget) {
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// Add in the absolute offset of the widget.
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nsRect absBounds;
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nsRect lc;
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widget->WidgetToScreen(lc, absBounds);
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// Convert widget coordinates to twips
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aAbsoluteTwipsRect.x += NSIntPixelsToTwips(absBounds.x, p2t);
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aAbsoluteTwipsRect.y += NSIntPixelsToTwips(absBounds.y, p2t);
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NS_RELEASE(widget);
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break;
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}
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parent->GetParent(parent);
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}
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aAbsoluteTwipsRect.x += viewOffset.x;
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aAbsoluteTwipsRect.y += viewOffset.y;
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}
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// convert to pixel coordinates
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if (NS_SUCCEEDED(rv)) {
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aAbsolutePixelRect.x = NSTwipsToIntPixels(aAbsoluteTwipsRect.x, t2p);
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aAbsolutePixelRect.y = NSTwipsToIntPixels(aAbsoluteTwipsRect.y, t2p);
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aAbsolutePixelRect.width = NSTwipsToIntPixels(aAbsoluteTwipsRect.width, t2p);
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aAbsolutePixelRect.height = NSTwipsToIntPixels(aAbsoluteTwipsRect.height, t2p);
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}
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return rv;
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}
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@ -243,8 +243,20 @@ public:
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const nsRect& aDirtyRect,
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const nsRect& aRect);
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/**
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* Helper routine to that returns the height of the screen
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*
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*/
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static nsresult GetScreenHeight(nsIPresContext* aPresContext, nscoord& aHeight);
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/**
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* Helper method to get the absolute position of a frame
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*
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*/
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static nsresult GetAbsoluteFramePosition(nsIPresContext* aPresContext,
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nsIFrame *aFrame,
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nsRect& aAbsoluteTwipsRect,
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nsRect& aAbsolutePixelRect);
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protected:
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virtual ~nsFormControlFrame();
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@ -59,6 +59,7 @@
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#include "nsIDOMHTMLLegendElement.h"
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#include "nsIDOMHTMLButtonElement.h"
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#include "nsIEventStateManager.h"
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#include "nsIScrollableView.h"
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#ifdef DEBUG_evaughan
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//#define DEBUG_rods
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@ -968,3 +969,81 @@ nsFormControlFrame::GetScreenHeight(nsIPresContext* aPresContext, nscoord& aHeig
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return NS_ERROR_FAILURE;
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}
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// Calculate a frame's position in screen coordinates
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nsresult
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nsFormControlFrame::GetAbsoluteFramePosition(nsIPresContext* aPresContext,
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nsIFrame *aFrame,
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nsRect& aAbsoluteTwipsRect,
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nsRect& aAbsolutePixelRect)
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{
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//XXX: This code needs to take the view's offset into account when calculating
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//the absolute coordinate of the frame.
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nsresult rv = NS_OK;
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aFrame->GetRect(aAbsoluteTwipsRect);
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// zero these out,
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// because the GetOffsetFromView figures them out
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aAbsoluteTwipsRect.x = 0;
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aAbsoluteTwipsRect.y = 0;
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// Get conversions between twips and pixels
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float t2p;
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float p2t;
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aPresContext->GetTwipsToPixels(&t2p);
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aPresContext->GetPixelsToTwips(&p2t);
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// Add in frame's offset from it it's containing view
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nsIView *containingView = nsnull;
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nsPoint offset;
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rv = aFrame->GetOffsetFromView(aPresContext, offset, &containingView);
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if (NS_SUCCEEDED(rv) && (nsnull != containingView)) {
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aAbsoluteTwipsRect.x += offset.x;
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aAbsoluteTwipsRect.y += offset.y;
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nsPoint viewOffset;
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containingView->GetPosition(&viewOffset.x, &viewOffset.y);
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nsIView * parent;
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containingView->GetParent(parent);
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while (nsnull != parent) {
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nsPoint po;
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parent->GetPosition(&po.x, &po.y);
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viewOffset.x += po.x;
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viewOffset.y += po.y;
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nsIScrollableView * scrollView;
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if (NS_OK == containingView->QueryInterface(NS_GET_IID(nsIScrollableView), (void **)&scrollView)) {
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nscoord x;
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nscoord y;
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scrollView->GetScrollPosition(x, y);
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viewOffset.x -= x;
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viewOffset.y -= y;
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}
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nsIWidget * widget;
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parent->GetWidget(widget);
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if (nsnull != widget) {
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// Add in the absolute offset of the widget.
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nsRect absBounds;
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nsRect lc;
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widget->WidgetToScreen(lc, absBounds);
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// Convert widget coordinates to twips
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aAbsoluteTwipsRect.x += NSIntPixelsToTwips(absBounds.x, p2t);
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aAbsoluteTwipsRect.y += NSIntPixelsToTwips(absBounds.y, p2t);
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NS_RELEASE(widget);
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break;
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}
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parent->GetParent(parent);
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}
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aAbsoluteTwipsRect.x += viewOffset.x;
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aAbsoluteTwipsRect.y += viewOffset.y;
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}
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// convert to pixel coordinates
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if (NS_SUCCEEDED(rv)) {
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aAbsolutePixelRect.x = NSTwipsToIntPixels(aAbsoluteTwipsRect.x, t2p);
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aAbsolutePixelRect.y = NSTwipsToIntPixels(aAbsoluteTwipsRect.y, t2p);
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aAbsolutePixelRect.width = NSTwipsToIntPixels(aAbsoluteTwipsRect.width, t2p);
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aAbsolutePixelRect.height = NSTwipsToIntPixels(aAbsoluteTwipsRect.height, t2p);
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}
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return rv;
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}
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@ -243,8 +243,20 @@ public:
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const nsRect& aDirtyRect,
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const nsRect& aRect);
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/**
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* Helper routine to that returns the height of the screen
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*
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*/
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static nsresult GetScreenHeight(nsIPresContext* aPresContext, nscoord& aHeight);
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/**
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* Helper method to get the absolute position of a frame
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*
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*/
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static nsresult GetAbsoluteFramePosition(nsIPresContext* aPresContext,
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nsIFrame *aFrame,
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nsRect& aAbsoluteTwipsRect,
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nsRect& aAbsolutePixelRect);
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protected:
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virtual ~nsFormControlFrame();
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