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top-margin support

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This commit is contained in:
Erik Faye-Lund 2007-11-22 20:33:47 +00:00
parent 1b91475b6c
commit b6f05fa0a6
1 changed files with 104 additions and 36 deletions
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140
synctracker2.cpp
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@ -6,6 +6,8 @@
const _TCHAR g_szClassName[] = _T("myWindowClass");
const int topMarginHeight = 20;
const int fontHeight = 16;
const int fontWidth = 12;
int scrollPosX;
@ -26,14 +28,14 @@ void setupScrollBars(HWND hwnd)
SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
}
void scroll(HWND hwnd, int dx, int dy)
void setScrollPos(HWND hwnd, int newScrollPosX, int newScrollPosY)
{
const int oldScrollPosX = scrollPosX;
const int oldScrollPosY = scrollPosY;
// update scrollPos
scrollPosX += dx;
scrollPosY += dy;
scrollPosX = newScrollPosX;
scrollPosY = newScrollPosY;
// clamp scrollPos
scrollPosX = max(scrollPosX, 0);
@ -41,12 +43,20 @@ void scroll(HWND hwnd, int dx, int dy)
if (oldScrollPosX != scrollPosX || oldScrollPosY != scrollPosY)
{
int scrollX = oldScrollPosX - scrollPosX;
int scrollY = (oldScrollPosY - scrollPosY) * fontHeight;
RECT clip;
GetClientRect(hwnd, &clip);
clip.top = topMarginHeight; /* don't scroll the top line */
ScrollWindowEx(
hwnd,
oldScrollPosX - scrollPosX,
(oldScrollPosY - scrollPosY) * fontHeight,
NULL,
scrollX,
scrollY,
NULL,
&clip,
NULL,
NULL,
SW_INVALIDATE
@ -55,6 +65,57 @@ void scroll(HWND hwnd, int dx, int dy)
}
}
void paintTracks(HDC hdc, RECT rcTracks)
{
char temp[256];
int firstLine = scrollPosY / fontHeight;
int lastLine = scrollPosY + (rcTracks.bottom + fontHeight - 1) / fontHeight;
int trackLeft = -scrollPosX;
for (int x = 0; x < 10; ++x)
{
int trackWidth = fontWidth * 5;
RECT topMargin;
topMargin.top = 0;
topMargin.bottom = topMarginHeight;
topMargin.left = trackLeft;
topMargin.right = trackLeft + trackWidth;
FillRect( hdc, &topMargin, (HBRUSH)GetStockObject(LTGRAY_BRUSH));
/* format the text */
_snprintf_s(temp, 256, "track %d", x);
SetBkMode(hdc, TRANSPARENT);
TextOut(hdc,
trackLeft, 0,
temp, int(strlen(temp))
);
// PaintRect(hdc, &topMargin, GetColour(TXC_BACKGROUND));
// ExcludeClipRect(hdc, rcTracks.left, rcTracks.top, rcTracks.right, topMarginHeight);
SetBkMode(hdc, OPAQUE);
// SetBkColor(hdc, RGB(255, 0, 0));
for (int y = firstLine; y < lastLine; ++y)
{
int val = y | (x << 8);
/* format the text */
_snprintf_s(temp, 256, "%04X ", val);
TextOut(hdc,
trackLeft,
topMarginHeight + (y - scrollPosY) * fontHeight,
temp, int(strlen(temp))
);
}
trackLeft += trackWidth;
}
}
void paintWindow(HWND hwnd)
{
PAINTSTRUCT ps;
@ -62,22 +123,19 @@ void paintWindow(HWND hwnd)
SetBkMode(hdc, OPAQUE);
// SetBkColor(hdc, RGB(255, 0, 0));
/*
RECT margin = rect;
margin.left = 0;
margin.right = LeftMarginWidth();
rect.left += LeftMarginWidth();
PaintMargin(hdc, nLineNo, &margin);
*/
paintTracks(hdc, ps.rcPaint);
int firstLine = scrollPosY + ps.rcPaint.top / fontHeight;
int lastLine = scrollPosY + (ps.rcPaint.bottom + fontHeight - 1) / fontHeight;
for (int x = 0; x < 10; ++x)
{
for (int y = firstLine; y < lastLine; ++y)
{
int val = y | (x << 8);
/* format the text */
char temp[256];
_snprintf_s(temp, 256, "%04X ", val);
TextOut(hdc, x * fontWidth * 5 - scrollPosX, (y - scrollPosY) * fontHeight, temp, int(strlen(temp)));
}
}
EndPaint(hwnd, &ps);
}
@ -90,24 +148,40 @@ void onCreate(HWND hwnd)
setupScrollBars(hwnd);
}
int getScrollPos(HWND hwnd, int bar)
{
SCROLLINFO si = { sizeof(si), SIF_TRACKPOS };
GetScrollInfo(hwnd, bar, &si);
return int(si.nTrackPos);
}
void onScroll(HWND hwnd, UINT sbCode, int newPos)
{
switch (sbCode)
{
case SB_TOP:
setScrollPos(hwnd, scrollPosX, 0);
break;
case SB_LINEUP:
scroll(hwnd, 0, -1);
setScrollPos(hwnd, scrollPosX, scrollPosY - 1);
break;
case SB_LINEDOWN:
scroll(hwnd, 0, 1);
setScrollPos(hwnd, scrollPosX, scrollPosY + 1);
break;
case SB_PAGEUP:
scroll(hwnd, 0, -windowLines);
setScrollPos(hwnd, scrollPosX, scrollPosY - windowLines);
break;
case SB_PAGEDOWN:
scroll(hwnd, 0, windowLines);
setScrollPos(hwnd, scrollPosX, scrollPosY + windowLines);
break;
case SB_THUMBPOSITION:
case SB_THUMBTRACK:
setScrollPos(hwnd, scrollPosX, getScrollPos(hwnd, SB_VERT));
break;
}
}
@ -150,14 +224,7 @@ void onPaint(HWND hwnd)
paintWindow(hwnd);
}
int getScrollPos(HWND hwnd, int bar)
{
SCROLLINFO si = { sizeof(si), SIF_TRACKPOS };
GetScrollInfo(hwnd, bar, &si);
return int(si.nTrackPos);
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
LRESULT CALLBACK windowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
@ -201,7 +268,7 @@ int _tmain(int argc, _TCHAR* argv[])
//Step 1: Registering the Window Class
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = 0;
wc.lpfnWndProc = WndProc;
wc.lpfnWndProc = windowProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
@ -222,9 +289,10 @@ int _tmain(int argc, _TCHAR* argv[])
hwnd = CreateWindowEx(
WS_EX_CLIENTEDGE,
g_szClassName,
_T("The title of my window"),
_T("SyncTracker 3000"),
WS_VSCROLL | WS_HSCROLL | WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 240, 120,
CW_USEDEFAULT, CW_USEDEFAULT, // x, y
CW_USEDEFAULT, CW_USEDEFAULT, // width, height
NULL, NULL, hInstance, NULL
);