Method UpdateMode

src/tree_gui.cpp:97–127

* Update the GUI and enable/disable planting to reflect selected options. */

	 * Update the GUI and enable/disable planting to reflect selected options.
	 */
	void UpdateMode()
	{
		this->RaiseButtons();

		const int current_tree = this->tree_to_plant;

		if (this->tree_to_plant >= 0) {
			/* Activate placement */
			SndConfirmBeep();
			SetObjectToPlace(SPR_CURSOR_TREE, PAL_NONE, HT_RECT | HT_DIAGONAL, this->window_class, this->window_number);
			this->tree_to_plant = current_tree; // SetObjectToPlace may call ResetObjectToPlace which may reset tree_to_plant to -1
		} else {
			/* Deactivate placement */
			ResetObjectToPlace();
		}

		if (this->tree_to_plant == TREE_INVALID) {
			this->LowerWidget(WID_BT_TYPE_RANDOM);
		} else if (this->tree_to_plant >= 0) {
			this->LowerWidget(WID_BT_TYPE_BUTTON_FIRST + this->tree_to_plant);
		}

		switch (this->mode) {
			case PM_NORMAL: this->LowerWidget(WID_BT_MODE_NORMAL); break;
			case PM_FOREST_SM: this->LowerWidget(WID_BT_MODE_FOREST_SM); break;
			case PM_FOREST_LG: this->LowerWidget(WID_BT_MODE_FOREST_LG); break;
			default: NOT_REACHED();
		}

		this->SetDirty();
	}

	void DoPlantForest(TileIndex tile)
	{