static LRESULT CALLBACK
WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
int redraw = 0;
switch (message) {
case WM_CHAR: {
switch (wparam) {
case '+':
the_scale *= 1.2f;
redraw = 1;
break;
case '-':
the_scale /= 1.2f;
redraw = 1;
break;
case 'f':
case 'F': {
float wscale, hscale;
wscale = win_width / (float)the_width;
hscale = win_height / (float)the_height;
the_scale *= wscale > hscale ? hscale : wscale;
redraw = 1;
break;
}
case '1':
the_scale = 1.0;
redraw = 1;
break;
case 'q':
case 'Q':
finish = 1;
break;
}
break;
}
case WM_PAINT: {
HFONT font;
BeginPaint(hwnd, &the_output.ps);
font = CreateFont(fontsize, 0, 0, 0, 0, FALSE, FALSE, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH, NULL);
SelectObject(the_output.ps.hdc, (HGDIOBJ) font);
windows_box(&the_output, 0xff, 0xff, 0xff, 0, 0, win_width, 0, win_height);
the_output.max_x = 0;
the_output.max_y = 0;
output_draw(&the_output.loutput);
the_width = the_output.max_x;
the_height = the_output.max_y;
DeleteObject(font);
EndPaint(hwnd, &the_output.ps);
break;
}
case WM_LBUTTONDOWN:
state = 1;
x = GET_X_LPARAM(lparam);
y = GET_Y_LPARAM(lparam);
break;
case WM_LBUTTONUP:
state = 0;
break;
case WM_MOUSEMOVE:
if (!(wparam & MK_LBUTTON))
state = 0;
if (state) {
int new_x = GET_X_LPARAM(lparam);
int new_y = GET_Y_LPARAM(lparam);
x_delta -= new_x - x;
y_delta -= new_y - y;
x = new_x;
y = new_y;
redraw = 1;
}
break;
case WM_KEYDOWN:
switch (wparam) {
case VK_ESCAPE:
finish = 1;
break;
case VK_LEFT:
x_delta -= win_width/10;
redraw = 1;
break;
case VK_RIGHT:
x_delta += win_width/10;
redraw = 1;
break;
case VK_UP:
y_delta -= win_height/10;
redraw = 1;
break;
case VK_DOWN:
y_delta += win_height/10;
redraw = 1;
break;
case VK_PRIOR:
if (control) {
x_delta -= win_width;
redraw = 1;
} else {
y_delta -= win_height;
redraw = 1;
}
break;
case VK_NEXT:
if (control) {
x_delta += win_width;
redraw = 1;
} else {
y_delta += win_height;
redraw = 1;
}
break;
case VK_HOME:
x_delta = 0;
y_delta = 0;
redraw = 1;
break;
case VK_END:
x_delta = INT_MAX;
y_delta = INT_MAX;
redraw = 1;
break;
case VK_CONTROL:
control = 1;
break;
}
break;
case WM_KEYUP:
switch (wparam) {
case VK_CONTROL:
control = 0;
break;
}
break;
case WM_DESTROY:
/* only kill the program if closing the actual toplevel, not the fake one */
if (hwnd == the_output.toplevel)
PostQuitMessage(0);
return 0;
case WM_SIZE: {
float wscale, hscale;
win_width = LOWORD(lparam);
win_height = HIWORD(lparam);
wscale = win_width / (float)the_width;
hscale = win_height / (float)the_height;
the_scale *= wscale > hscale ? hscale : wscale;
if (the_scale < 1.0f)
the_scale = 1.0f;
redraw = 1;
break;
}
}
if (redraw) {
if (x_delta > the_width - win_width)
x_delta = the_width - win_width;
if (y_delta > the_height - win_height)
y_delta = the_height - win_height;
if (x_delta < 0)
x_delta = 0;
if (y_delta < 0)
y_delta = 0;
fontsize = (unsigned)(the_fontsize * the_scale);
gridsize = (unsigned)(the_gridsize * the_scale);
RedrawWindow(hwnd, NULL, NULL, RDW_INVALIDATE);
}
return DefWindowProc(hwnd, message, wparam, lparam);
}
static LRESULT CALLBACK
WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
int redraw = 0;
switch (message) {
case WM_PAINT: {
HDC hdc;
PAINTSTRUCT ps;
hdc = BeginPaint(hwnd, &ps);
windows_box(&ps, 0xff, 0xff, 0xff, 0, 0, win_width, 0, win_height);
output_draw(&windows_draw_methods, the_logical, the_legend, the_topology, &ps);
EndPaint(hwnd, &ps);
break;
}
case WM_LBUTTONDOWN:
state = 1;
x = GET_X_LPARAM(lparam);
y = GET_Y_LPARAM(lparam);
break;
case WM_LBUTTONUP:
state = 0;
break;
case WM_MOUSEMOVE:
if (!(wparam & MK_LBUTTON))
state = 0;
if (state) {
int new_x = GET_X_LPARAM(lparam);
int new_y = GET_Y_LPARAM(lparam);
x_delta -= new_x - x;
y_delta -= new_y - y;
x = new_x;
y = new_y;
redraw = 1;
}
break;
case WM_KEYDOWN:
switch (wparam) {
case 'q':
case 'Q':
case VK_ESCAPE:
finish = 1;
break;
case VK_LEFT:
x_delta -= win_width/10;
redraw = 1;
break;
case VK_RIGHT:
x_delta += win_width/10;
redraw = 1;
break;
case VK_UP:
y_delta -= win_height/10;
redraw = 1;
break;
case VK_DOWN:
y_delta += win_height/10;
redraw = 1;
break;
case VK_PRIOR:
if (control) {
x_delta -= win_width;
redraw = 1;
} else {
y_delta -= win_height;
redraw = 1;
}
break;
case VK_NEXT:
if (control) {
x_delta += win_width;
redraw = 1;
} else {
y_delta += win_height;
redraw = 1;
}
break;
case VK_HOME:
x_delta = 0;
y_delta = 0;
redraw = 1;
break;
case VK_END:
x_delta = INT_MAX;
y_delta = INT_MAX;
redraw = 1;
break;
case VK_CONTROL:
control = 1;
break;
}
break;
case WM_KEYUP:
switch (wparam) {
case VK_CONTROL:
control = 0;
break;
}
break;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
case WM_SIZE:
win_width = LOWORD(lparam);
win_height = HIWORD(lparam);
redraw = 1;
break;
}
if (redraw) {
if (x_delta > the_width - win_width)
x_delta = the_width - win_width;
if (y_delta > the_height - win_height)
y_delta = the_height - win_height;
if (x_delta < 0)
x_delta = 0;
if (y_delta < 0)
y_delta = 0;
if (win_width > the_width && win_height > the_height) {
fontsize = the_fontsize;
gridsize = the_gridsize;
if (win_width > the_width) {
fontsize = the_fontsize * win_width / the_width;
gridsize = the_gridsize * win_width / the_width;
}
if (win_height > the_height) {
unsigned int new_fontsize = the_fontsize * win_height / the_height;
unsigned int new_gridsize = the_gridsize * win_height / the_height;
if (new_fontsize < fontsize)
fontsize = new_fontsize;
if (new_gridsize < gridsize)
gridsize = new_gridsize;
}
}
RedrawWindow(hwnd, NULL, NULL, RDW_INVALIDATE);
}
return DefWindowProc(hwnd, message, wparam, lparam);
}