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huge scroll

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This commit is contained in:
Erik Faye-Lund 2007-12-06 23:20:16 +00:00
parent c1ccc8d4ac
commit bb3aabf667
2 changed files with 110 additions and 80 deletions
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181
trackview.cpp
View File

@ -12,8 +12,8 @@ static const int fontWidth = 6;
static const int trackWidth = fontWidth * 16;
static const int lines = 0x20;
static const int tracks = 16;
static const int lines = 0x80;
static const int tracks = 32;
TrackView::TrackView(HWND hwnd)
{
@ -60,31 +60,84 @@ void TrackView::onPaint()
EndPaint(hwnd, &ps);
}
void TrackView::paintTopMargin(HDC hdc, RECT rcTracks)
{
RECT fillRect;
RECT topLeftMargin;
topLeftMargin.top = 0;
topLeftMargin.bottom = topMarginHeight;
topLeftMargin.left = 0;
topLeftMargin.right = leftMarginWidth;
fillRect = topLeftMargin;
DrawEdge(hdc, &fillRect, BDR_RAISEDINNER | BDR_RAISEDOUTER, BF_ADJUST | BF_BOTTOM);
FillRect(hdc, &fillRect, (HBRUSH)GetStockObject(LTGRAY_BRUSH));
ExcludeClipRect(hdc, topLeftMargin.left, topLeftMargin.top, topLeftMargin.right, topLeftMargin.bottom);
int firstTrack = min(max(scrollPosX / trackWidth, 0), tracks - 1);
int lastTrack = min(max(firstTrack + windowTracks + 1, 0), tracks - 1);
for (int track = firstTrack; track <= lastTrack; ++track)
{
char temp[256];
RECT topMargin;
topMargin.top = 0;
topMargin.bottom = topMarginHeight;
topMargin.left = getScreenX(track);
topMargin.right = topMargin.left + trackWidth;
if (!RectVisible(hdc, &topMargin)) continue;
RECT fillRect = topMargin;
HBRUSH bgBrush = (HBRUSH)GetStockObject(LTGRAY_BRUSH);
if (track == editTrack) bgBrush = editBrush;
DrawEdge(hdc, &fillRect, BDR_RAISEDINNER | BDR_RAISEDOUTER, BF_ADJUST | BF_LEFT | BF_RIGHT | BF_BOTTOM);
FillRect(hdc, &fillRect, bgBrush);
/* format the text */
_sntprintf_s(temp, 256, _T("track %d"), track);
TextOut(hdc,
fillRect.left, 0,
temp, int(_tcslen(temp))
);
ExcludeClipRect(hdc, topMargin.left, topMargin.top, topMargin.right, topMargin.bottom);
}
RECT topRightMargin;
topRightMargin.top = 0;
topRightMargin.bottom = topMarginHeight;
topRightMargin.left = getScreenX(tracks);
topRightMargin.right = rcTracks.right;
fillRect = topRightMargin;
DrawEdge(hdc, &fillRect, BDR_RAISEDINNER | BDR_RAISEDOUTER, BF_ADJUST | BF_BOTTOM);
FillRect(hdc, &fillRect, (HBRUSH)GetStockObject(LTGRAY_BRUSH));
ExcludeClipRect(hdc, topRightMargin.left, topRightMargin.top, topRightMargin.right, topRightMargin.bottom);
}
void TrackView::paintTracks(HDC hdc, RECT rcTracks)
{
TCHAR temp[256];
int firstTrack = min(max(scrollPosX / trackWidth, 0), tracks - 1);
int lastTrack = min(max(firstTrack + windowTracks + 1, 0), tracks - 1);
int firstLine = editLine - windowLines / 2 - 1;
int lastLine = editLine + windowLines / 2 + 1;
/* clamp first & last line */
firstLine = min(max(firstLine, 0), lines - 1);
lastLine = min(max(lastLine, 0), lines - 1);
// printf("%d %d\n", firstLine, lastLine);
SetBkMode(hdc, TRANSPARENT);
SelectObject(hdc, editBrush);
RECT topLeftCorner;
topLeftCorner.top = 0;
topLeftCorner.bottom = topMarginHeight;
topLeftCorner.left = 0;
topLeftCorner.right = leftMarginWidth;
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);
paintTopMargin(hdc, rcTracks);
for (int line = firstLine; line <= lastLine; ++line)
{
@ -94,6 +147,8 @@ void TrackView::paintTracks(HDC hdc, RECT rcTracks)
leftMargin.top = getScreenY(line);
leftMargin.bottom = leftMargin.top + fontHeight;
if (!RectVisible(hdc, &leftMargin)) continue;
if (line == editLine) FillRect(hdc, &leftMargin, editBrush);
else FillRect(hdc, &leftMargin, (HBRUSH)GetStockObject(LTGRAY_BRUSH));
@ -115,33 +170,8 @@ void TrackView::paintTracks(HDC hdc, RECT rcTracks)
SetTextColor(hdc, RGB(0, 0, 0));
for (int track = 0; track < tracks; ++track)
for (int track = firstTrack; track <= lastTrack; ++track)
{
RECT topMargin;
topMargin.top = 0;
topMargin.bottom = topMarginHeight;
topMargin.left = getScreenX(track);
topMargin.right = topMargin.left + trackWidth;
RECT fillRect = topMargin;
HBRUSH bgBrush = (HBRUSH)GetStockObject(LTGRAY_BRUSH);
if (track == editTrack) bgBrush = editBrush;
DrawEdge(hdc, &fillRect, BDR_RAISEDINNER | BDR_RAISEDOUTER, BF_ADJUST | BF_LEFT | BF_RIGHT | BF_BOTTOM);
FillRect(hdc, &fillRect, bgBrush);
/* format the text */
_sntprintf_s(temp, 256, _T("track %d"), track);
TextOut(hdc,
fillRect.left, 0,
temp, int(_tcslen(temp))
);
ExcludeClipRect(hdc, topMargin.left, topMargin.top, topMargin.right, topMargin.bottom);
// SetBkColor(hdc, RGB(255, 0, 0));
for (int line = firstLine; line <= lastLine; ++line)
{
RECT patternDataRect;
@ -150,6 +180,8 @@ void TrackView::paintTracks(HDC hdc, RECT rcTracks)
patternDataRect.top = getScreenY(line);
patternDataRect.bottom = patternDataRect.top + fontHeight;
if (!RectVisible(hdc, &patternDataRect)) continue;
HBRUSH bgBrush = (HBRUSH)GetStockObject(WHITE_BRUSH);
if (line % 8 == 0) bgBrush = (HBRUSH)GetStockObject(LTGRAY_BRUSH);
if (line == editLine) bgBrush = editBrush;
@ -176,36 +208,33 @@ void TrackView::paintTracks(HDC hdc, RECT rcTracks)
}
}
/* pad top margin to the left edge */
RECT topMargin;
topMargin.top = 0;
topMargin.bottom = topMarginHeight;
topMargin.left = getScreenX(tracks);
topMargin.right = rcTracks.right;
DrawEdge(hdc, &topMargin, BDR_SUNKENINNER | BDR_RAISEDOUTER, BF_ADJUST | BF_LEFT);
FillRect(hdc, &topMargin, (HBRUSH)GetStockObject(LTGRAY_BRUSH));
/* right margin */
RECT rightMargin;
rightMargin.top = getScreenY(0);
rightMargin.bottom = getScreenY(lines);
rightMargin.left = getScreenX(tracks);
rightMargin.right = rcTracks.right;
FillRect( hdc, &rightMargin, (HBRUSH)GetStockObject(GRAY_BRUSH));
{
RECT rightMargin;
rightMargin.top = getScreenY(0);
rightMargin.bottom = getScreenY(lines);
rightMargin.left = getScreenX(tracks);
rightMargin.right = rcTracks.right;
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 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));
{
RECT topPadding;
topPadding.top = max(rcTracks.top, topMarginHeight);
topPadding.bottom = getScreenY(0);
topPadding.left = rcTracks.left;
topPadding.right = rcTracks.right;
FillRect(hdc, &topPadding, (HBRUSH)GetStockObject(GRAY_BRUSH));
}
}
void TrackView::setupScrollBars()
@ -327,15 +356,13 @@ void TrackView::setEditTrack(int newEditTrack)
trackRect.right = trackRect.left + trackWidth;
InvalidateRect(hwnd, &trackRect, TRUE);
if (getScreenX(editTrack) < 0)
{
setScrollPos(scrollPosX - trackWidth, scrollPosY);
}
else if (getScreenX(editTrack) + trackWidth > windowWidth)
{
setScrollPos(scrollPosX + trackWidth, scrollPosY);
}
else setupScrollBars();
int firstTrack = scrollPosX / trackWidth;
int lastTrack = firstTrack + windowTracks;
int newFirstTrack = firstTrack;
if (editTrack >= lastTrack) newFirstTrack = editTrack - (lastTrack - firstTrack - 1);
if (editTrack < firstTrack) newFirstTrack = editTrack;
setScrollPos(newFirstTrack * trackWidth, scrollPosY);
}
static int getScrollPos(HWND hwnd, int bar)
@ -435,7 +462,7 @@ void TrackView::onSize(int width, int height)
windowHeight = height;
windowLines = (height - topMarginHeight) / fontHeight;
windowTracks = (width - leftMarginWidth) / trackWidth;
windowTracks = (width - leftMarginWidth) / trackWidth;
setEditLine(editLine);
setupScrollBars();
@ -485,7 +512,7 @@ LRESULT TrackView::windowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
return FALSE;
}
LRESULT CALLBACK trackViewWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
static LRESULT CALLBACK trackViewWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
// Get the TrackView instance (if any)
#pragma warning(suppress:4312) /* remove a pointless warning */

9
trackview.h
View File

@ -6,6 +6,11 @@ public:
TrackView(HWND hwnd);
~TrackView();
private:
// some nasty hackery to forward the window messages
friend static LRESULT CALLBACK trackViewWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
LRESULT windowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
// events
void onCreate();
void onPaint();
@ -15,9 +20,9 @@ public:
void onKeyDown(UINT keyCode, UINT flags);
// the window procedure
LRESULT windowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
void paintTracks(HDC hdc, RECT rcTracks);
void paintTopMargin(HDC hdc, RECT rcTracks);
void setupScrollBars();
void setScrollPos(int newScrollPosX, int newScrollPosY);
@ -37,9 +42,7 @@ public:
int windowLines, windowTracks;
HWND hwnd;
HBRUSH editBrush;
};
ATOM registerTrackViewWindowClass(HINSTANCE hInstance);