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Codechange: Add ability to allocate PIP-space dynamically by ratio.

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This can be used to space out, centre, start-align, or end-align widgets without additional spacers.
This commit is contained in:
Peter Nelson
2023-10-27 20:01:54 +01:00
committed by Peter Nelson
parent ac54bd7e58
commit 6317967dba
2 changed files with 102 additions and 6 deletions
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83
src/widget.cpp
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@@ -1498,6 +1498,22 @@ void NWidgetPIPContainer::SetPIP(uint8_t pip_pre, uint8_t pip_inter, uint8_t pip
this->pip_post = ScaleGUITrad(this->uz_pip_post);
}
/**
* Set additional pre/inter/post space for the container.
*
* @param pip_ratio_pre Ratio of additional space in front of the first child widget (above
* for the vertical container, at the left for the horizontal container).
* @param pip_ratio_inter Ratio of additional space between two child widgets.
* @param pip_ratio_post Ratio of additional space after the last child widget (below for the
* vertical container, at the right for the horizontal container).
*/
void NWidgetPIPContainer::SetPIPRatio(uint8_t pip_ratio_pre, uint8_t pip_ratio_inter, uint8_t pip_ratio_post)
{
this->pip_ratio_pre = pip_ratio_pre;
this->pip_ratio_inter = pip_ratio_inter;
this->pip_ratio_post = pip_ratio_post;
}
/** Horizontal container widget. */
NWidgetHorizontal::NWidgetHorizontal(NWidContainerFlags flags) : NWidgetPIPContainer(NWID_HORIZONTAL, flags)
{
@@ -1562,6 +1578,7 @@ void NWidgetHorizontal::SetupSmallestSize(Window *w, bool init_array)
}
this->resize_y = LeastCommonMultiple(this->resize_y, child_wid->resize_y);
}
if (this->fill_x == 0 && this->pip_ratio_pre + this->pip_ratio_inter + this->pip_ratio_post > 0) this->fill_x = 1;
/* 4. Increase by required PIP space. */
this->smallest_x += this->pip_pre + this->gaps * this->pip_inter + this->pip_post;
}
@@ -1572,7 +1589,7 @@ void NWidgetHorizontal::AssignSizePosition(SizingType sizing, int x, int y, uint
/* Compute additional width given to us. */
uint additional_length = given_width;
if (sizing == ST_SMALLEST && (this->flags & NC_EQUALSIZE)) {
if (this->pip_ratio_pre + this->pip_ratio_inter + this->pip_ratio_post != 0 || (sizing == ST_SMALLEST && (this->flags & NC_EQUALSIZE))) {
/* For EQUALSIZE containers this does not sum to smallest_x during initialisation */
additional_length -= this->pip_pre + this->gaps * this->pip_inter + this->pip_post;
for (NWidgetBase *child_wid = this->head; child_wid != nullptr; child_wid = child_wid->next) {
@@ -1653,8 +1670,21 @@ void NWidgetHorizontal::AssignSizePosition(SizingType sizing, int x, int y, uint
}
assert(num_changing_childs == 0);
uint pre = this->pip_pre;
uint inter = this->pip_inter;
if (additional_length > 0) {
/* Allocate remaining space by pip ratios. If this doesn't round exactly, the unused space will fall into pip_post
* which is never explicitly needed. */
int r = this->pip_ratio_pre + this->gaps * this->pip_ratio_inter + this->pip_ratio_post;
if (r > 0) {
pre += this->pip_ratio_pre * additional_length / r;
if (this->gaps > 0) inter += this->pip_ratio_inter * additional_length / r;
}
}
/* Third loop: Compute position and call the child. */
uint position = rtl ? this->current_x - this->pip_pre : this->pip_pre; // Place to put next child relative to origin of the container.
uint position = rtl ? this->current_x - pre : pre; // Place to put next child relative to origin of the container.
NWidgetBase *child_wid = this->head;
while (child_wid != nullptr) {
uint child_width = child_wid->current_x;
@@ -1662,7 +1692,7 @@ void NWidgetHorizontal::AssignSizePosition(SizingType sizing, int x, int y, uint
uint child_y = y + child_wid->padding.top;
child_wid->AssignSizePosition(sizing, child_x, child_y, child_width, child_wid->current_y, rtl);
uint padded_child_width = child_width + child_wid->padding.Horizontal() + this->pip_inter;
uint padded_child_width = child_width + child_wid->padding.Horizontal() + inter;
position = rtl ? position - padded_child_width : position + padded_child_width;
child_wid = child_wid->next;
@@ -1744,6 +1774,7 @@ void NWidgetVertical::SetupSmallestSize(Window *w, bool init_array)
}
this->resize_x = LeastCommonMultiple(this->resize_x, child_wid->resize_x);
}
if (this->fill_y == 0 && this->pip_ratio_pre + this->pip_ratio_inter + this->pip_ratio_post > 0) this->fill_y = 1;
/* 4. Increase by required PIP space. */
this->smallest_y += this->pip_pre + this->gaps * this->pip_inter + this->pip_post;
}
@@ -1754,7 +1785,7 @@ void NWidgetVertical::AssignSizePosition(SizingType sizing, int x, int y, uint g
/* Compute additional height given to us. */
uint additional_length = given_height;
if (sizing == ST_SMALLEST && (this->flags & NC_EQUALSIZE)) {
if (this->pip_ratio_pre + this->pip_ratio_inter + this->pip_ratio_post != 0 || (sizing == ST_SMALLEST && (this->flags & NC_EQUALSIZE))) {
/* For EQUALSIZE containers this does not sum to smallest_y during initialisation */
additional_length -= this->pip_pre + this->gaps * this->pip_inter + this->pip_post;
for (NWidgetBase *child_wid = this->head; child_wid != nullptr; child_wid = child_wid->next) {
@@ -1826,14 +1857,27 @@ void NWidgetVertical::AssignSizePosition(SizingType sizing, int x, int y, uint g
}
assert(num_changing_childs == 0);
uint pre = this->pip_pre;
uint inter = this->pip_inter;
if (additional_length > 0) {
/* Allocate remaining space by pip ratios. If this doesn't round exactly, the unused space will fall into pip_post
* which is never explicitly needed. */
int r = this->pip_ratio_pre + this->gaps * this->pip_ratio_inter + this->pip_ratio_post;
if (r > 0) {
pre += this->pip_ratio_pre * additional_length / r;
if (this->gaps > 0) inter += this->pip_ratio_inter * additional_length / r;
}
}
/* Third loop: Compute position and call the child. */
uint position = this->pip_pre; // Place to put next child relative to origin of the container.
uint position = pre; // Place to put next child relative to origin of the container.
for (NWidgetBase *child_wid = this->head; child_wid != nullptr; child_wid = child_wid->next) {
uint child_x = x + (rtl ? child_wid->padding.right : child_wid->padding.left);
uint child_height = child_wid->current_y;
child_wid->AssignSizePosition(sizing, child_x, y + position + child_wid->padding.top, child_wid->current_x, child_height, rtl);
position += child_height + child_wid->padding.Vertical() + this->pip_inter;
position += child_height + child_wid->padding.Vertical() + inter;
}
}
@@ -2170,6 +2214,24 @@ void NWidgetBackground::SetPIP(uint8_t pip_pre, uint8_t pip_inter, uint8_t pip_p
this->child->SetPIP(pip_pre, pip_inter, pip_post);
}
/**
* Set additional pre/inter/post space ratios for the background widget.
*
* @param pip_ratio_pre Ratio of additional space in front of the first child widget (above
* for the vertical container, at the left for the horizontal container).
* @param pip_ratio_inter Ratio of additional space between two child widgets.
* @param pip_ratio_post Ratio of additional space after the last child widget (below for the
* vertical container, at the right for the horizontal container).
* @note Using this function implies that the widget has (or will have) child widgets.
*/
void NWidgetBackground::SetPIPRatio(uint8_t pip_ratio_pre, uint8_t pip_ratio_inter, uint8_t pip_ratio_post)
{
if (this->child == nullptr) {
this->child = new NWidgetVertical();
}
this->child->SetPIPRatio(pip_ratio_pre, pip_ratio_inter, pip_ratio_post);
}
void NWidgetBackground::AdjustPaddingForZoom()
{
if (child != nullptr) child->AdjustPaddingForZoom();
@@ -3178,6 +3240,15 @@ static const NWidgetPart *MakeNWidget(const NWidgetPart *nwid_begin, const NWidg
break;
}
case WPT_PIPRATIO: {
NWidgetPIPContainer *nwc = dynamic_cast<NWidgetPIPContainer *>(*dest);
if (nwc != nullptr) nwc->SetPIPRatio(nwid_begin->u.pip.pre, nwid_begin->u.pip.inter, nwid_begin->u.pip.post);
NWidgetBackground *nwb = dynamic_cast<NWidgetBackground *>(*dest);
if (nwb != nullptr) nwb->SetPIPRatio(nwid_begin->u.pip.pre, nwid_begin->u.pip.inter, nwid_begin->u.pip.post);
break;
}
case WPT_SCROLLBAR: {
NWidgetCore *nwc = dynamic_cast<NWidgetCore *>(*dest);
if (unlikely(nwc == nullptr)) throw std::runtime_error("WPT_SCROLLBAR requires NWidgetCore");