cpp/openttd-patchpack/source Changeset - r25206:136702761466

Changeset - r25206:136702761466

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Rubidium - 4 years ago 2021-04-18 18:29:46
rubidium@openttd.org

Codechange: merge duplicated logic to scroll in lists by key into a single function

5 files changed with 67 insertions and 95 deletions:

src/network/network_content_gui.cpp

src/network/network_gui.cpp

src/newgrf_gui.cpp

src/widget.cpp

src/widget_type.h

0 comments (0 inline, 0 general)

src/network/network_content_gui.cpp

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@@ @@ -863,32 +863,8 @@ public: @@
 	EventState OnKeyPress(WChar key, uint16 keycode) override
+	{
 		if (this->vscroll->UpdateListPositionOnKeyPress(this->list_pos, keycode) == ES_NOT_HANDLED) {
 		switch (keycode) {
 			case WKC_UP:
 				/* scroll up by one */
 				if (this->list_pos > 0) this->list_pos--;
 				break;
 			case WKC_DOWN:
 				/* scroll down by one */
 				if (this->list_pos < (int)this->content.size() - 1) this->list_pos++;
 				break;
 			case WKC_PAGEUP:
 				/* scroll up a page */
 				this->list_pos = (this->list_pos < this->vscroll->GetCapacity()) ? 0 : this->list_pos - this->vscroll->GetCapacity();
 				break;
 			case WKC_PAGEDOWN:
 				/* scroll down a page */
 				this->list_pos = std::min(this->list_pos + this->vscroll->GetCapacity(), (int)this->content.size() - 1);
 				break;
 			case WKC_HOME:
 				/* jump to beginning */
 				this->list_pos = 0;
 				break;
 			case WKC_END:
 				/* jump to end */
 				this->list_pos = (int)this->content.size() - 1;
 				break;
 			case WKC_SPACE:
 			case WKC_RETURN:
 				if (keycode == WKC_RETURN || !IsWidgetFocused(WID_NCL_FILTER)) {
@@ @@ -909,9 +885,9 @@ public: @@
 			default:
 				return ES_NOT_HANDLED;
+		}
+		}
 		if (this->content.size() == 0) {
 			this->list_pos = 0; // above stuff may result in "-1".
 			if (this->UpdateFilterState()) {
 				this->content.ForceRebuild();
 				this->InvalidateData();

src/network/network_gui.cpp

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@@ @@ -66,8 +66,8 @@ void UpdateNetworkGameWindow() @@
+}
 typedef GUIList<NetworkGameList*, StringFilter&> GUIGameServerList;
 typedef uint16 ServerListPosition;
 static const ServerListPosition SLP_INVALID = 0xFFFF;
 typedef int ServerListPosition;
 static const ServerListPosition SLP_INVALID = -1;
 /** Full blown container to make it behave exactly as we want :) */
 class NWidgetServerListHeader : public NWidgetContainer {
@@ @@ -771,39 +771,8 @@ public: @@
 		EventState state = ES_NOT_HANDLED;
 		/* handle up, down, pageup, pagedown, home and end */
 		if (keycode == WKC_UP || keycode == WKC_DOWN || keycode == WKC_PAGEUP || keycode == WKC_PAGEDOWN || keycode == WKC_HOME || keycode == WKC_END) {
 			if (this->servers.size() == 0) return ES_HANDLED;
 			switch (keycode) {
 				case WKC_UP:
 					/* scroll up by one */
 					if (this->list_pos == SLP_INVALID) return ES_HANDLED;
 					if (this->list_pos > 0) this->list_pos--;
 					break;
 				case WKC_DOWN:
 					/* scroll down by one */
 					if (this->list_pos == SLP_INVALID) return ES_HANDLED;
 					if (this->list_pos < this->servers.size() - 1) this->list_pos++;
 					break;
 				case WKC_PAGEUP:
 					/* scroll up a page */
 		if (this->vscroll->UpdateListPositionOnKeyPress(this->list_pos, keycode) == ES_HANDLED) {
 					if (this->list_pos == SLP_INVALID) return ES_HANDLED;
 					this->list_pos = (this->list_pos < this->vscroll->GetCapacity()) ? 0 : this->list_pos - this->vscroll->GetCapacity();
 					break;
 				case WKC_PAGEDOWN:
 					/* scroll down a page */
 					if (this->list_pos == SLP_INVALID) return ES_HANDLED;
 					this->list_pos = std::min(this->list_pos + this->vscroll->GetCapacity(), (int)this->servers.size() - 1);
 					break;
 				case WKC_HOME:
 					/* jump to beginning */
 					this->list_pos = 0;
 					break;
 				case WKC_END:
 					/* jump to end */
 					this->list_pos = (ServerListPosition)this->servers.size() - 1;
 					break;
 				default: NOT_REACHED();
+			}
 			this->server = this->servers[this->list_pos];

src/newgrf_gui.cpp

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@@ @@ -1318,42 +1318,8 @@ struct NewGRFWindow : public Window, New @@
+	{
 		if (!this->editable) return ES_NOT_HANDLED;
 		switch (keycode) {
 			case WKC_UP:
 				/* scroll up by one */
 				if (this->avail_pos > 0) this->avail_pos--;
 				break;
 			case WKC_DOWN:
 				/* scroll down by one */
 				if (this->avail_pos < (int)this->avails.size() - 1) this->avail_pos++;
 				break;
 			case WKC_PAGEUP:
 				/* scroll up a page */
 				this->avail_pos = (this->avail_pos < this->vscroll2->GetCapacity()) ? 0 : this->avail_pos - this->vscroll2->GetCapacity();
 				break;
 		if (this->vscroll2->UpdateListPositionOnKeyPress(this->avail_pos, keycode) == ES_NOT_HANDLED) return ES_NOT_HANDLED;
 			case WKC_PAGEDOWN:
 				/* scroll down a page */
 				this->avail_pos = std::min(this->avail_pos + this->vscroll2->GetCapacity(), (int)this->avails.size() - 1);
 				break;
 			case WKC_HOME:
 				/* jump to beginning */
 				this->avail_pos = 0;
 				break;
 			case WKC_END:
 				/* jump to end */
 				this->avail_pos = (uint)this->avails.size() - 1;
 				break;
 			default:
 				return ES_NOT_HANDLED;
+		}
 		if (this->avails.size() == 0) this->avail_pos = -1;
 		if (this->avail_pos >= 0) {
 			this->active_sel = nullptr;
 			DeleteWindowByClass(WC_GRF_PARAMETERS);

src/widget.cpp

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@@ @@ -1975,6 +1975,66 @@ int Scrollbar::GetScrolledRowFromWidget( @@
+}
 /**
  * Update the given list position as if it were on this scroll bar when the given keycode was pressed.
  * This does not update the actual position of this scroll bar, that is left to the caller. It does,
  * however use the capacity and count of the scroll bar for the bounds and amount to scroll.
+ *
  * When the count is 0 or the return is ES_NOT_HANDLED, then the position is not updated.
  * With WKC_UP and WKC_DOWN the position goes one up or down respectively.
  * With WKC_PAGEUP and WKC_PAGEDOWN the position goes one capacity up or down respectively.
  * With WKC_HOME the first position is selected and with WKC_END the last position is selected.
  * This function ensures that pos is in the range [0..count).
  * @param list_position The current position in the list.
  * @param key_code      The pressed key code.
  * @return ES_NOT_HANDLED when another key than the 6 specific keys was pressed, otherwise ES_HANDLED.
  */
 EventState Scrollbar::UpdateListPositionOnKeyPress(int &list_position, uint16 keycode) const
+{
 	int new_pos = list_position;
 	switch (keycode) {
 		case WKC_UP:
 			/* scroll up by one */
 			new_pos--;
 			break;
 		case WKC_DOWN:
 			/* scroll down by one */
 			new_pos++;
 			break;
 		case WKC_PAGEUP:
 			/* scroll up a page */
 			new_pos -= this->GetCapacity();
 			break;
 		case WKC_PAGEDOWN:
 			/* scroll down a page */
 			new_pos += this->GetCapacity();
 			break;
 		case WKC_HOME:
 			/* jump to beginning */
 			new_pos = 0;
 			break;
 		case WKC_END:
 			/* jump to end */
 			new_pos = this->GetCount() - 1;
 			break;
 		default:
 			return ES_NOT_HANDLED;
+	}
 	/* If there are no elements, there is nothing to scroll/update. */
 	if (this->GetCount() != 0) {
 		list_position = Clamp(new_pos, 0, this->GetCount() - 1);
+	}
 	return ES_HANDLED;
+}
 /**
  * Set capacity of visible elements from the size and resize properties of a widget.
  * @param w       Window.
  * @param widget  Widget with size and resize properties.

src/widget_type.h

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@@ @@ -749,6 +749,7 @@ public: @@
+	}
 	int GetScrolledRowFromWidget(int clickpos, const Window * const w, int widget, int padding = 0, int line_height = -1) const;
 	EventState UpdateListPositionOnKeyPress(int &list_position, uint16 keycode) const;
 };
 /**

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