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61 lines
2 KiB
C++
61 lines
2 KiB
C++
#include "RasterThumbsCtrl.h"
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#include "RasterCtrl.h"
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// Scale factor between pane size and thumbs sizes
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const int THUMBS_HSIZE_MUL = 9;
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const int THUMBS_HSIZE_DIV = 10;
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///////////////////////////////////////////////////////////////////////////////////////////////
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// constructor
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RasterThumbsCtrl::RasterThumbsCtrl(RasterCtrl *t) : RasterBaseCtrl(t, false, true)
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{
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} // END constructor class RasterThumbsCtrl
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///////////////////////////////////////////////////////////////////////////////////////////////
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// destructor
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RasterThumbsCtrl::~RasterThumbsCtrl()
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{
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} // END destructor class RasterThumbsCtrl
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///////////////////////////////////////////////////////////////////////////////////////////////
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// calculates image scale factor
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int RasterThumbsCtrl::CalcScale(int imScale, int rasterWidth, int maxPageHeight)
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{
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// calculates scale factor based on max thumb width
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// slightly smaller than ctrl width
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int maxScaledWidth = iscale(GetSize().cx, THUMBS_HSIZE_MUL, THUMBS_HSIZE_DIV);
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return iscale(maxScaledWidth, 1000, rasterWidth);
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} // END RasterThumbsCtrl::CalcScale()
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///////////////////////////////////////////////////////////////////////////////////////////////
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// left click handler --> shows requested page in viewer
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void RasterThumbsCtrl::LeftDown(Point p, dword keyflags)
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{
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// gets point position in raster coordinates
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int clickPos = vScrollBar.Get() + iscale(p.y, vScrollBar.GetPage(), GetView().GetHeight());
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clickPos = iscale(clickPos, 1000, imageScale);
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// gets gap size between pages
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int gapSize = iscale(10, 1000, imageScale);
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// gets the page array
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Array<MemoryRaster> &pages = rasterCtrl->GetPages();
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// iterates through page positions to find the requested one
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int top = 0;
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for(int iPage = 0; iPage < pages.GetCount(); iPage++)
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{
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MemoryRaster &page = pages[iPage];
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int bottom = top + page.GetHeight();
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if(clickPos >= top && clickPos <= bottom)
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{
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rasterCtrl->SetPage(iPage);
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break;
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}
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top += page.GetHeight() + gapSize;
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}
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} // END RasterThumbsCtrl::LeftDown()
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