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(svn r16519) -Add: Prevent hiding of a window titlebar behind the status bar.

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alberth 2009-06-05 07:25:26 +00:00
parent 69d86f0b11
commit ec5db12adc
1 changed files with 53 additions and 27 deletions
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80
src/window.cpp
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@ -1468,6 +1468,56 @@ void ResizeWindow(Window *w, int delta_x, int delta_y)
w->SetDirty();
}
/** The minimum number of pixels of the title bar must be visible in both the X or Y direction */
static const int MIN_VISIBLE_TITLE_BAR = 13;
/** Direction for moving the window. */
enum PreventHideDirection {
PHD_UP, ///< Above v is a safe position.
PHD_DOWN, ///< Below v is a safe position.
};
/**
* Do not allow hiding of the rectangle with base coordinates \a nx and \a ny behind window \a v.
* If needed, move the window base coordinates to keep it visible.
* @param nx Base horizontal coordinate of the rectangle.
* @param ny Base vertical coordinate of the rectangle.
* @param rect Rectangle that must stay visible for #MIN_VISIBLE_TITLE_BAR pixels (horizontally, vertically, or both)
* @param v Window lying in front of the rectangle.
* @param px Previous horizontal base coordinate.
* @param dir If no room horizontally, move the rectangle to the indicated position.
*/
void PreventHiding(int *nx, int *ny, const Rect &rect, const Window *v, int px, PreventHideDirection dir)
{
if (v == NULL) return;
int v_bottom = v->top + v->height;
int v_right = v->left + v->width;
int safe_y = (dir == PHD_UP) ? (v->top - MIN_VISIBLE_TITLE_BAR - rect.top) : (v_bottom + MIN_VISIBLE_TITLE_BAR - rect.bottom); // Compute safe vertical position.
if (*ny + rect.top <= v->top - MIN_VISIBLE_TITLE_BAR) return; // Above v is enough space
if (*ny + rect.bottom >= v_bottom + MIN_VISIBLE_TITLE_BAR) return; // Below v is enough space
/* Vertically, the rectangle is hidden behind v. */
if (*nx + rect.left + MIN_VISIBLE_TITLE_BAR < v->left) { // At left of v.
if (v->left < MIN_VISIBLE_TITLE_BAR) *ny = safe_y; // But enough room, force it to a safe position.
return;
}
if (*nx + rect.right - MIN_VISIBLE_TITLE_BAR > v_right) { // At right of v.
if (v_right > _screen.width - MIN_VISIBLE_TITLE_BAR) *ny = safe_y; // Not enough room, force it to a safe position.
return;
}
/* Horizontally also hidden, force movement to a safe area. */
if (px + rect.left < v->left && v->left >= MIN_VISIBLE_TITLE_BAR) { // Coming from the left, and enough room there.
*nx = v->left - MIN_VISIBLE_TITLE_BAR - rect.left;
} else if (px + rect.right > v_right && v_right <= _screen.width - MIN_VISIBLE_TITLE_BAR) { // Coming from the right, and enough room there.
*nx = v_right + MIN_VISIBLE_TITLE_BAR - rect.right;
} else {
*ny = safe_y;
}
}
static bool _dragging_window; ///< A window is being dragged or resized.
static bool HandleWindowDragging()
@ -1587,37 +1637,13 @@ static bool HandleWindowDragging()
caption_rect.bottom = caption->pos_y + caption->current_y;
}
/* The minimum number of pixels of the title bar must be visible
* in both the X or Y direction */
static const int MIN_VISIBLE_TITLE_BAR = 13;
/* Make sure the window doesn't leave the screen */
nx = Clamp(nx, MIN_VISIBLE_TITLE_BAR - caption_rect.right, _screen.width - MIN_VISIBLE_TITLE_BAR - caption_rect.left);
ny = Clamp(ny, 0, _screen.height - MIN_VISIBLE_TITLE_BAR);
/* Make sure the title bar isn't hidden by behind the main tool bar */
Window *v = FindWindowById(WC_MAIN_TOOLBAR, 0);
if (v != NULL) {
int v_bottom = v->top + v->height;
int v_right = v->left + v->width;
if (ny + caption_rect.top >= v->top && ny + caption_rect.top < v_bottom) {
if ((v->left < MIN_VISIBLE_TITLE_BAR && nx + caption_rect.left < v->left) ||
(v_right > _screen.width - MIN_VISIBLE_TITLE_BAR && nx + caption_rect.right > v_right)) {
ny = v_bottom;
} else {
if (nx + caption_rect.left > v->left - MIN_VISIBLE_TITLE_BAR &&
nx + caption_rect.right < v_right + MIN_VISIBLE_TITLE_BAR) {
if (w->top >= v_bottom) {
ny = v_bottom;
} else if (w->left < nx) {
nx = v->left - MIN_VISIBLE_TITLE_BAR - caption_rect.left;
} else {
nx = v_right + MIN_VISIBLE_TITLE_BAR - caption_rect.right;
}
}
}
}
}
/* Make sure the title bar isn't hidden behind the main tool bar or the status bar. */
PreventHiding(&nx, &ny, caption_rect, FindWindowById(WC_MAIN_TOOLBAR, 0), w->left, PHD_DOWN);
PreventHiding(&nx, &ny, caption_rect, FindWindowById(WC_STATUS_BAR, 0), w->left, PHD_UP);
if (w->viewport != NULL) {
w->viewport->left += nx - w->left;