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Make empty columns automatically expand in GridContainer

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Michael Alexsander Silva Dias 2019-09-08 02:20:34 -03:00
parent b0f0e0e2fc
commit 24ed6b58e1
2 changed files with 21 additions and 17 deletions
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3
doc/classes/GridContainer.xml
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@ -4,7 +4,8 @@
Grid container used to arrange elements in a grid like layout.
</brief_description>
<description>
Grid container will arrange its children in a grid like structure, the grid columns are specified using the [member columns] property and the number of rows will be equal to the number of children in the container divided by the number of columns. For example, if the container has 5 children, and 2 columns, there will be 3 rows in the container. Notice that grid layout will preserve the columns and rows for every size of the container.
Grid container will arrange its children in a grid like structure, the grid columns are specified using the [member columns] property and the number of rows will be equal to the number of children in the container divided by the number of columns. For example, if the container has 5 children, and 2 columns, there will be 3 rows in the container.
Notice that grid layout will preserve the columns and rows for every size of the container, and that empty columns will be expanded automatically.
</description>
<tutorials>
</tutorials>

35
scene/gui/grid_container.cpp
View file

@ -36,20 +36,18 @@ void GridContainer::_notification(int p_what) {
case NOTIFICATION_SORT_CHILDREN: {
int valid_controls_index;
Map<int, int> col_minw; // max of min_width of all controls in each col (indexed by col)
Map<int, int> row_minh; // max of min_height of all controls in each row (indexed by row)
Set<int> col_expanded; // columns which have the SIZE_EXPAND flag set
Set<int> row_expanded; // rows which have the SIZE_EXPAND flag set
Map<int, int> col_minw; // Max of min_width of all controls in each col (indexed by col).
Map<int, int> row_minh; // Max of min_height of all controls in each row (indexed by row).
Set<int> col_expanded; // Columns which have the SIZE_EXPAND flag set.
Set<int> row_expanded; // Rows which have the SIZE_EXPAND flag set.
int hsep = get_constant("hseparation");
int vsep = get_constant("vseparation");
int max_col = MIN(get_child_count(), columns);
int max_row = get_child_count() / columns;
// Compute the per-column/per-row data
valid_controls_index = 0;
// Compute the per-column/per-row data.
int valid_controls_index = 0;
for (int i = 0; i < get_child_count(); i++) {
Control *c = Object::cast_to<Control>(get_child(i));
if (!c || !c->is_visible_in_tree())
@ -77,7 +75,12 @@ void GridContainer::_notification(int p_what) {
}
}
// Evaluate the remaining space for expanded columns/rows
// Consider all empty columns expanded.
for (int i = valid_controls_index; i < columns; i++) {
col_expanded.insert(i);
}
// Evaluate the remaining space for expanded columns/rows.
Size2 remaining_space = get_size();
for (Map<int, int>::Element *E = col_minw.front(); E; E = E->next()) {
if (!col_expanded.has(E->key()))
@ -93,7 +96,7 @@ void GridContainer::_notification(int p_what) {
bool can_fit = false;
while (!can_fit && col_expanded.size() > 0) {
// Check if all minwidth constraints are ok if we use the remaining space
// Check if all minwidth constraints are OK if we use the remaining space.
can_fit = true;
int max_index = col_expanded.front()->get();
for (Set<int>::Element *E = col_expanded.front(); E; E = E->next()) {
@ -105,7 +108,7 @@ void GridContainer::_notification(int p_what) {
}
}
// If not, the column with maximum minwidth is not expanded
// If not, the column with maximum minwidth is not expanded.
if (!can_fit) {
col_expanded.erase(max_index);
remaining_space.width -= col_minw[max_index];
@ -114,7 +117,7 @@ void GridContainer::_notification(int p_what) {
can_fit = false;
while (!can_fit && row_expanded.size() > 0) {
// Check if all minwidth constraints are ok if we use the remaining space
// Check if all minheight constraints are OK if we use the remaining space.
can_fit = true;
int max_index = row_expanded.front()->get();
for (Set<int>::Element *E = row_expanded.front(); E; E = E->next()) {
@ -126,14 +129,14 @@ void GridContainer::_notification(int p_what) {
}
}
// If not, the row with maximum minwidth is not expanded
// If not, the row with maximum minheight is not expanded.
if (!can_fit) {
row_expanded.erase(max_index);
remaining_space.height -= row_minh[max_index];
}
}
// Finally, fit the nodes
// Finally, fit the nodes.
int col_expand = col_expanded.size() > 0 ? remaining_space.width / col_expanded.size() : 0;
int row_expand = row_expanded.size() > 0 ? remaining_space.height / row_expanded.size() : 0;
@ -152,11 +155,11 @@ void GridContainer::_notification(int p_what) {
if (col == 0) {
col_ofs = 0;
if (row > 0)
row_ofs += ((row_expanded.has(row - 1)) ? row_expand : row_minh[row - 1]) + vsep;
row_ofs += (row_expanded.has(row - 1) ? row_expand : row_minh[row - 1]) + vsep;
}
Point2 p(col_ofs, row_ofs);
Size2 s((col_expanded.has(col)) ? col_expand : col_minw[col], (row_expanded.has(row)) ? row_expand : row_minh[row]);
Size2 s(col_expanded.has(col) ? col_expand : col_minw[col], row_expanded.has(row) ? row_expand : row_minh[row]);
fit_child_in_rect(c, Rect2(p, s));