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yay, proper scrolling! \o/

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This commit is contained in:
Erik Faye-Lund 2007-12-04 01:29:38 +00:00
parent 18bb1b5566
commit 13628d094d
2 changed files with 123 additions and 79 deletions
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199
trackview.cpp
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@ -15,16 +15,18 @@ static const int tracks = 16;
int TrackView::getScreenY(int line)
{
return topMarginHeight + (line - scrollPosY) * fontHeight;
return topMarginHeight + (line * fontHeight) - scrollPosY;
}
void TrackView::onCreate(HWND hwnd)
{
scrollPosX = 0;
scrollPosY = 0;
windowWidth = -1;
windowHeight = -1;
editLine = 0;
setupScrollBars(hwnd);
}
@ -55,25 +57,29 @@ void TrackView::paintTracks(HDC hdc, RECT rcTracks)
{
TCHAR temp[256];
int firstLine = scrollPosY + max((rcTracks.top - topMarginHeight) / fontHeight, 0);
int lastLine = scrollPosY + min(((rcTracks.bottom - topMarginHeight) + (fontHeight - 1)) / fontHeight, lines - 1);
int firstLine = 0; // scrollPosY + max((rcTracks.top - topMarginHeight) / fontHeight, 0);
int lastLine = lines; // scrollPosY + min(((rcTracks.bottom - topMarginHeight) + (fontHeight - 1)) / fontHeight, lines - 1);
int editLine = firstLine + (lastLine - firstLine) / 2;
// int editLine = firstLine + (lastLine - firstLine) / 2;
HBRUSH editBrush = CreateSolidBrush(RGB(255, 255, 0));
// HBRUSH editBrush = CreateSolidBrush(RGB(255, 255, 0));
lastLine = min(lastLine, lines);
lastLine = min(lastLine, lines) - 1;
/*
RECT topLeftCorner;
topLeftCorner.top = 0;
topLeftCorner.bottom = topMarginHeight;
topLeftCorner.left = 0;
topLeftCorner.right = leftMarginWidth;
FillRect(hdc, &topLeftCorner, (HBRUSH)GetStockObject(GRAY_BRUSH));
RECT fillRect = topLeftCorner;
DrawEdge(hdc, &fillRect, BDR_RAISEDINNER | BDR_RAISEDOUTER, BF_ADJUST | BF_BOTTOM);
FillRect(hdc, &fillRect, (HBRUSH)GetStockObject(LTGRAY_BRUSH));
ExcludeClipRect(hdc, topLeftCorner.left, topLeftCorner.top, topLeftCorner.right, topLeftCorner.bottom);
*/
SetBkMode(hdc, TRANSPARENT);
// SetBkMode(hdc, OPAQUE);
for (int line = firstLine; line < lastLine; ++line)
for (int line = firstLine; line <= lastLine; ++line)
{
RECT leftMargin;
leftMargin.left = 0;
@ -81,9 +87,8 @@ void TrackView::paintTracks(HDC hdc, RECT rcTracks)
leftMargin.top = getScreenY(line);
leftMargin.bottom = leftMargin.top + fontHeight;
// if (y == editLine) FillRect(hdc, &leftMargin, editBrush);
// else
FillRect(hdc, &leftMargin, (HBRUSH)GetStockObject(LTGRAY_BRUSH));
if (line == editLine) FillRect(hdc, &leftMargin, editBrush);
else FillRect(hdc, &leftMargin, (HBRUSH)GetStockObject(LTGRAY_BRUSH));
DrawEdge(hdc, &leftMargin, BDR_RAISEDINNER | BDR_RAISEDOUTER, BF_RIGHT | BF_BOTTOM | BF_TOP);
// Rectangle( hdc, leftMargin.left, leftMargin.top, leftMargin.right, leftMargin.bottom + 1);
@ -129,18 +134,21 @@ void TrackView::paintTracks(HDC hdc, RECT rcTracks)
ExcludeClipRect(hdc, topMargin.left, topMargin.top, topMargin.right, topMargin.bottom);
// SetBkColor(hdc, RGB(255, 0, 0));
for (int line = firstLine; line < lastLine; ++line)
for (int line = firstLine; line <= lastLine; ++line)
{
RECT patternDataRect;
patternDataRect.left = trackLeft;
patternDataRect.right = trackLeft + trackWidth;
patternDataRect.top = getScreenY(line);
patternDataRect.bottom = patternDataRect.top + fontHeight;
if (line % 8 == 0) FillRect( hdc, &patternDataRect, (HBRUSH)GetStockObject(LTGRAY_BRUSH));
else FillRect( hdc, &patternDataRect, (HBRUSH)GetStockObject(WHITE_BRUSH));
// if (y % 8 == 0) DrawEdge(hdc, &patternDataRect, BDR_RAISEDINNER | BDR_SUNKENOUTER, BF_TOP | BF_BOTTOM | BF_FLAT);
HBRUSH bgBrush = (HBRUSH)GetStockObject(WHITE_BRUSH);
if (line % 8 == 0) bgBrush = (HBRUSH)GetStockObject(LTGRAY_BRUSH);
if (line == editLine) bgBrush = editBrush;
RECT fillRect = patternDataRect;
if (line == editLine && x == 1) DrawEdge(hdc, &fillRect, BDR_RAISEDINNER | BDR_SUNKENOUTER, BF_ADJUST | BF_TOP | BF_BOTTOM | BF_LEFT | BF_RIGHT);
FillRect( hdc, &fillRect, bgBrush);
bool key = (line % 8 == 0);
float val = (float(line) / 16);
@ -153,7 +161,7 @@ void TrackView::paintTracks(HDC hdc, RECT rcTracks)
temp, int(_tcslen(temp))
);
}
/*
RECT bottomMargin;
bottomMargin.top = getScreenY(lines);
bottomMargin.bottom = rcTracks.bottom;
@ -161,7 +169,7 @@ void TrackView::paintTracks(HDC hdc, RECT rcTracks)
bottomMargin.right = trackLeft + trackWidth;
DrawEdge(hdc, &bottomMargin, BDR_SUNKENINNER | BDR_RAISEDOUTER, BF_ADJUST | BF_TOP);
FillRect(hdc, &bottomMargin, (HBRUSH)GetStockObject(WHITE_BRUSH));
*/
trackLeft += trackWidth;
}
@ -174,23 +182,28 @@ void TrackView::paintTracks(HDC hdc, RECT rcTracks)
DrawEdge(hdc, &topMargin, BDR_SUNKENINNER | BDR_RAISEDOUTER, BF_ADJUST | BF_LEFT);
FillRect(hdc, &topMargin, (HBRUSH)GetStockObject(LTGRAY_BRUSH));
/* pad left margin to the left edge */
RECT leftMargin;
leftMargin.top = getScreenY(lines);
leftMargin.bottom = rcTracks.bottom;
leftMargin.left = 0;
leftMargin.right = leftMarginWidth;
DrawEdge(hdc, &leftMargin, BDR_SUNKENINNER | BDR_RAISEDOUTER, BF_ADJUST | BF_RIGHT);
FillRect(hdc, &leftMargin, (HBRUSH)GetStockObject(GRAY_BRUSH));
/* right margin */
RECT rightMargin;
rightMargin.top = topMarginHeight;
rightMargin.bottom = rcTracks.bottom;
rightMargin.top = getScreenY(0);
rightMargin.bottom = getScreenY(lines);
rightMargin.left = trackLeft;
rightMargin.right = rcTracks.right;
DrawEdge(hdc, &rightMargin, BDR_SUNKENINNER | BDR_RAISEDOUTER, BF_ADJUST | BF_LEFT);
FillRect( hdc, &rightMargin, (HBRUSH)GetStockObject(LTGRAY_BRUSH));
FillRect( hdc, &rightMargin, (HBRUSH)GetStockObject(GRAY_BRUSH));
RECT bottomPadding;
bottomPadding.top = getScreenY(lines);
bottomPadding.bottom = rcTracks.bottom;
bottomPadding.left = rcTracks.left;
bottomPadding.right = rcTracks.right;
FillRect(hdc, &bottomPadding, (HBRUSH)GetStockObject(GRAY_BRUSH));
RECT topPadding;
topPadding.top = rcTracks.top;
topPadding.bottom = getScreenY(0);
topPadding.left = rcTracks.left;
topPadding.right = rcTracks.right;
FillRect(hdc, &topPadding, (HBRUSH)GetStockObject(GRAY_BRUSH));
DeleteObject(editBrush);
}
@ -199,60 +212,87 @@ void TrackView::setupScrollBars(HWND hwnd)
{
SCROLLINFO si = { sizeof(si) };
si.fMask = SIF_POS | SIF_PAGE | SIF_RANGE | SIF_DISABLENOSCROLL;
si.nPos = scrollPosY;
si.nPos = editLine;
si.nPage = windowLines;
si.nMin = 0;
si.nMax = lines - 1;
si.nMax = lines - 1 + windowLines - 1;
SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
si.fMask = SIF_POS | SIF_PAGE | SIF_RANGE | SIF_DISABLENOSCROLL;
si.nPos = scrollPosX;
si.nPage = windowWidth;
si.nPage = windowWidth / 2;
si.nMin = 0;
si.nMax = windowWidth * 2; // 0x80;
SetScrollInfo(hwnd, SB_HORZ, &si, TRUE);
}
void TrackView::scrollWindow(HWND hwnd, int scrollX, int scrollY)
{
RECT clip;
GetClientRect(hwnd, &clip);
if (scrollX == 0) clip.top = topMarginHeight; /* don't scroll the top line */
if (scrollY == 0) clip.left = leftMarginWidth; /* don't scroll the top line */
ScrollWindowEx(
hwnd,
scrollX,
scrollY,
NULL,
&clip,
NULL,
NULL,
SW_INVALIDATE
);
}
void TrackView::setScrollPos(HWND hwnd, int newScrollPosX, int newScrollPosY)
{
const int oldScrollPosX = scrollPosX;
const int oldScrollPosY = scrollPosY;
// update scrollPos
scrollPosX = newScrollPosX;
scrollPosY = newScrollPosY;
// clamp scrollPos
scrollPosX = max(scrollPosX, 0);
scrollPosY = max(scrollPosY, 0);
scrollPosY = min(scrollPosY, (lines) - windowLines);
if (oldScrollPosX != scrollPosX || oldScrollPosY != scrollPosY)
// clamp newscrollPosX
newScrollPosX = max(scrollPosX, 0);
if (newScrollPosX != scrollPosX || newScrollPosY != scrollPosY)
{
int scrollX = oldScrollPosX - scrollPosX;
int scrollY = (oldScrollPosY - scrollPosY) * fontHeight;
int scrollX = scrollPosX - newScrollPosX;
int scrollY = scrollPosY - newScrollPosY;
RECT clip;
GetClientRect(hwnd, &clip);
// update scrollPos
scrollPosX = newScrollPosX;
scrollPosY = newScrollPosY;
if (scrollX == 0) clip.top = topMarginHeight; /* don't scroll the top line */
if (scrollY == 0) clip.left = leftMarginWidth; /* don't scroll the top line */
ScrollWindowEx(
hwnd,
scrollX,
scrollY,
NULL,
&clip,
NULL,
NULL,
SW_INVALIDATE
);
scrollWindow(hwnd, scrollX, scrollY);
setupScrollBars(hwnd);
}
}
void TrackView::setEditLine(HWND hwnd, int newEditLine)
{
int oldEditLine = editLine;
editLine = newEditLine;
// clamp to document
editLine = max(editLine, 0);
editLine = min(editLine, lines - 1);
RECT clientRect;
GetClientRect(hwnd, &clientRect);
RECT lineRect;
lineRect.left = clientRect.left;
lineRect.right = clientRect.right;
lineRect.top = getScreenY(oldEditLine);
lineRect.bottom = lineRect.top + fontHeight;
InvalidateRect(hwnd, &lineRect, TRUE);
lineRect.top = getScreenY(editLine);
lineRect.bottom = lineRect.top + fontHeight;
InvalidateRect(hwnd, &lineRect, TRUE);
setScrollPos(hwnd, scrollPosX, ((editLine + 1) * fontHeight) - (windowHeight / 2));
}
static int getScrollPos(HWND hwnd, int bar)
{
SCROLLINFO si = { sizeof(si), SIF_TRACKPOS };
@ -265,28 +305,28 @@ void TrackView::onVScroll(HWND hwnd, UINT sbCode, int newPos)
switch (sbCode)
{
case SB_TOP:
setScrollPos(hwnd, scrollPosX, 0);
setEditLine(hwnd, 0);
break;
case SB_LINEUP:
setScrollPos(hwnd, scrollPosX, scrollPosY - 1);
setEditLine(hwnd, editLine - 1);
break;
case SB_LINEDOWN:
setScrollPos(hwnd, scrollPosX, scrollPosY + 1);
setEditLine(hwnd, editLine + 1);
break;
case SB_PAGEUP:
setScrollPos(hwnd, scrollPosX, scrollPosY - windowLines);
setEditLine(hwnd, editLine - windowLines / 2);
break;
case SB_PAGEDOWN:
setScrollPos(hwnd, scrollPosX, scrollPosY + windowLines);
setEditLine(hwnd, editLine + windowLines / 2);
break;
case SB_THUMBPOSITION:
case SB_THUMBTRACK:
setScrollPos(hwnd, scrollPosX, getScrollPos(hwnd, SB_VERT));
setEditLine(hwnd, getScrollPos(hwnd, SB_VERT));
break;
}
}
@ -327,11 +367,11 @@ void TrackView::onKeyDown(HWND hwnd, UINT keyCode, UINT flags)
{
switch (keyCode)
{
case VK_UP: setScrollPos(hwnd, scrollPosX, scrollPosY - 1); break;
case VK_DOWN: setScrollPos(hwnd, scrollPosX, scrollPosY + 1); break;
case VK_UP: setEditLine(hwnd, editLine - 1); break;
case VK_DOWN: setEditLine(hwnd, editLine + 1); break;
case VK_PRIOR: setScrollPos(hwnd, scrollPosX, scrollPosY - windowLines); break;
case VK_NEXT: setScrollPos(hwnd, scrollPosX, scrollPosY + windowLines); break;
case VK_PRIOR: setEditLine(hwnd, editLine - windowLines / 2); break;
case VK_NEXT: setEditLine(hwnd, editLine + windowLines / 2); break;
}
}
@ -344,7 +384,8 @@ void TrackView::onSize(HWND hwnd, int width, int height)
windowHeight = height;
windowLines = (height - topMarginHeight) / fontHeight;
// windowLines = min((height - topMarginHeight) / fontHeight, lines);
setEditLine(hwnd, editLine);
setupScrollBars(hwnd);
}

3
trackview.h
View File

@ -18,9 +18,12 @@ public:
void setupScrollBars(HWND hwnd);
void setScrollPos(HWND hwnd, int newScrollPosX, int newScrollPosY);
void setEditLine(HWND hwnd, int newEditLine);
void scrollWindow(HWND hwnd, int newScrollPosX, int newScrollPosY);
int getScreenY(int line);
int editLine;
int scrollPosX, scrollPosY;
int windowWidth, windowHeight;
int windowLines;